241. Amphora hyalina Kütz. (Pl. 1, Fig. 15.)

Kütz., 1844, 108, 30, 18.

Boyer, 1927b, 264.

Hend., 1951, 70, xv, 5.

Cleve-Euler, 1953b, 100, 693.

Cells solitary; frustules in girdle view sub-rectangular, with rounded corners; valves with convex dorsal margin; ventral margin nearly straight; fine longitudinal striae. Length, 50μ.

Distribution. Estuarine-neritic; marine; epontic on algae and sea grasses, and on fouling test plates, also planktonic, rarely benthic (probably adventitious). Australia: Moreton Bay, Lake Macquarie, Port Jackson, Botany Bay, Port Hacking. New Zealand: Wellington.

242. Amphora robusta Greg. (Pl. 7, Fig. 93.)

Greg., 1857, 516, 79.

Boyer, 1916, 65, 15, 1.

Cleve-Euler, 1953b, 92, 672.

Cells solitary; frustule in girdle view broad by oval with truncate extremities; valves arcuate, ventral margin straight or concave; raphe biarcuate; surface striate, striae transverse, moniliform; ventral side with broad band of striae along median line. Length, 50–70μ.

Distribution. Estuarine; marine; benthic and epontic, chiefly on fouling test plates, less commonly on weeds. Australia: Port Hacking, Botany Bay. New Zealand: Lyall Bay (Petit 1877).

243. Amphora proteus Greg. (Pl. 7, Fig. 94.)

Greg., 1857, 518, 81.

Boyer, 1916, 65, 15, 5, 6, 19.

Cleve-Euler, 1953b, 92, 673.

Cells solitary; frustules variable—in girdle view elliptic to oblong, bairel-shaped, broad, long and narrow, etc., with rounded ends; valves lunate, acute, sometimes arcuate, with straight ventral margin; raphe biarcuate, no central area in our specimens; striae transverse, moniliform, radial towards extremities; ventral side striate towards ends. Length, 40–95μ.

Distribution. Estuarine; epiphytic and benthic. Australia: Moreton Bay, Port Hacking. Recorded from Australia by A. S. (1875, 39) and from Lyall Bay, New Zealand, by Petit (1877).

244. Amphora egregia A. S. (Pl. 7, Fig. 95.)

A. S., 1875, 28, 13–15.

Boyer, 1927b, 257.

Cleve-Euler, 1953b, 95.

Cells solitary; in girdle view elliptic with truncate ends; valves lunate with rounded ends, ventral margin biarcuate, swollen at central area; raphe biarcuate; surface with series of marked transverse striae, ventral side with a row of strong radial ribs without puncta in between; girdle with 2 to 4 longitudinal rows of rounded areolae. Length, 50μ.

Distribution. Estuarine, epiphytic. Australia: Port Hacking; rare.

245. Amphora lineolata (Ehr.) Kütz. (Pl. 7, Fig. 96.)

Kütz., 1844, 107, 5, 36.

Boyer, 1916, 66, 15, 9, 10.

Cleve-Euler, 1953b, 100, 694.

Navicula lineolata Ehr., 1838, 14, 4.

Cells solitary; frustules lightly siliceous, in girdle view linear-elliptic with rostrate extremities, in valve view slender sickle-shaped without central area or central nodule; intercalary bands numerous, girdle zone finely striate. Length, 40–60μ.

Distribution. Fresh and brackish water; benthic. Australia: Port Hacking; rare.

246. Amphora ostrearia Breb. (Pl. 7, Fig. 97.)

In Kütz., 1849, 94.

Boyer, 1927, 265.

Amphora quadrata Breb. in Kütz., fide Boyer, 1927b, 265.

Amphora membranacea W. Sm., 20, 1853, fide Boyer, 1927, 265.

Cells solitary; frustules very thin-walled, and lightly silicified, elliptical-oblong with rounded ends in girdle view; in valve view with arcuate dorsal and straight ventral margin and acute ends; girdle zone with numerous longitudinal striac; central nodule dilated to a transverse stauros; chromatophores numerous, rounded. Length, 50–70μ.

Distribution. Estuarine; mesohaline; benthic; epontic on fouling test plates, and algae and sea grasses. Australia: Moreton Bay, Lake Macquarie, Botany Bay, Port Hacking, Port Phillip.

247. Amphora gigantea Grun. in A.S. (Pl. 7, Fig. 98a, b.)

A. S., 1875, 27, 16, 46.

Boyer, 1927b, 255.

Cleve-Euler, 1953b, 102, 699.

Cells solitary, epiphytic; frustule in girdle view broadly elliptic with rounded extremities; in valve view lunate with straight ventral margin and transverse moniliform striae; dorsally with fine longitudinal lines, ventrally hyaline except along median line and at ends, which are obliquely striate. Length, 80–120μ.

Distribution. Estuarine, marine; epontic and benthic; very common from algae and Zostera, fouling test plates, rocks and surface muds. Australia: Moreton Bay, Lake Macquarie, Port Jackson, Botany Bay, Port Hacking.

248. Amphora angusta Greg. var. typica Cl. (Pl. 7, Fig. 99a, b.)

Greg., 1857, 510, 12, 66.

Cleve, 1894–5, 135.

Cleve-Euler, 1953b, 103, 705a, b.

Cells solitary; frustules in girdle view, linear-elliptic, in valve view semi-elliptic with more or less straight raphe nearer to ventral wall, and clear axial area; striae transverse, marginal striae more distinct. Length, 40–60μ.

Distribution. Estuarine, brackish water. Australia: Lake Conjola, Lake Coila; common in these localities, but has not been found elsewhere.

249. Amphora granulata Greg. (Pl. 7, Fig. 100.)

Greg., 1857, 21, 525.

Boyer, 1927, 263.

Cells solitary; frustules in girdle view linear-elliptic, with broad, rostrate, truncate ends; in valve view, arcuate on dorsal side, straight or slightly concave on ventral side; median line straight, close to ventral margin. Length, 50μ.

Distribution. Australia: Lake Macquarie and east coast estuaries.

250. Amphora mexicana A.S. (Pl. 7, Fig. 101.)

A. S., 1875, 27, 46, 48.

Boyer, 1927, 255.

Cells solitary; frustules elliptical, truncate in girdle view; in valve view lunate with straight ventral margin; median line biarcuate; axial area not distinct; longitudinal line near dorsal margin on dorsal side. Length, 150μ.

Distribution. Australia: Lake Conjola, Mallacoota. New Zealand: Lyall Bay (Petit 1877).

251. Amphora spectabilis Greg. (Pl. 7, Fig. 102.)

Greg., 1857, 516.

Boyer, 1927, 269.

Cells solitary; frustules in girdle view oblong with rounded ends, girdle zone with numerous striated divisions; in valve view, arcuate, ends rounded on dorsal side, margin sinuate on ventral side. Median line biarcuate; striate frequently furcate, finer on ventral side, curved. Length, 80–100μ.

Distribution. Australia: Heron Island and east coast estuaries.

252. Amphora rhombi Kitton. (Pl. 7, Fig. 103).

Kitt. in A. S., 1875, 40, 39.

Boyer, 1927b, 266.

Cells solitary; frustules semi-rhombic with sharply acute, slightly incurved ends, in valve view obtusely triangular, ventral margin slightly incurved near apices and in centre; median line biarcuate; striae fine; puncta in undulating, longitudinal lines. Length, 200–250μ.

Distribution. Australia: Port Hacking.

253. Amphora hendeyi n. sp. (Pl. 7, Fig. 104).

Valves with slightly undulate ventral margin; dorsal margin almost straight in middle, then sharply and evenly curved at ends; large apical nodules, and characteristically large central nodule; raphe arcuate at each side of, and closely approaching or reaching, ventral margin of central nodule; striae fine, parallel to transverse axis. Length, 35–40μ.

Distribution. Fresh water. Australia: Lake Dobson; common.

254. Amphora arcta A. S. (Pl. 7, Fig. 105).

A. S., 1875, 26, 63.

Frustule elongate, tapering slightly from centre to poles, with rounded ends; valves with arcuate dorsal, almost straight ventral margins, narrow, elongate; raphe almost straight Length, 70–80μ.

Distribution Epontic, and on fouling plates. Australia: Port Hacking. New Zealand: Auckland Harbour; type locality, Port Lincoln, South Australia.

The following species of Amphora have been recorded previously:—

• A. acuta Greg., 1857. (Petit, 1877, 18.) Foveaux Strait.

• A. aponina Kütz., (is A. coffaeiformis) (Petit, 1877, 19.) Lyall Bay.

• A. aspera Petit, 1877. (Petit, 1877, 19.) Lyall Bay, Foveaux Strait (type loc.), Campbell Is.

• A. berggrenii Cleve, 1881. (Cleve, 1881.) Arthur's Pass. N.Z.

• A. bigibba Grun. in A.S., 1875. (Petit, 1877, 17.) Lyall Bay.

• A. cingulata Cl., 1878 (is A. ocellata Donk., 1861) (Gr. & St., 1886, 322.) Oamaru.

• A. coffaeiformis (Agh.) Kütz., 1844. (Petit, 1877.) Lyall Bay.

• A. contracta Grun. (is A. janischii A. S., 1875 (Gr. & St, 1887, 131.) Lyall Bay.

• A. crass Greg., 1857. (Petit, 1877, 17; Gr. & St., 1886, 322.) Foveaux Strait, Oamaru.

• A. cristat Petit (Petit, 1877, 18.) Foveaux Strait.

• A. cymbifera Greg., 1857 (Petit, 1877, 19.) Lyall Bay.

• A. eulensteinii Grun. var. A. S., 1875. (Petit, 1877, 18.) Foveaux Strait.

• A. furcata Leud.-Fort. (is A. spectabilis Greg., 1857). (Gr. & St., 1887, 72.) Oamaru.

• A. flexuosa Grev., 1863 c. (Curtis Island, type loc.)

• A. gracilis Ehr. (Ralfs in Pritch., 1861.) Australia.

• A. graeffei Grun. in A. S., 1875, 25. (Petit, 1877, 18.) Foveaux Strait.

• A. interlineata Gr. & St. (Gr. & St., 1887, 131.) Oamaru.

• A. janischi A.S., 1875. Recorded as A. contracta.

• A. labuensis Cl., 1878. (Gr. & St., 1886.) Oamaru.

• A. lineata Greg., 1857 (is A. coffaeiformis) (Petit, 1877)

  .

• A. marina W. Sm., 1853. (Petit, 1877, 19.) Lyall Bay.

• A. mexicana A.S, 1875, 27. (Petit, 1877. 16.) Lyall Bay.

• A. obtusa Greg., 1857. (Gr. & St., 1887, 131.) Oamaru.

• A. ocellata Donk, 1861. Recorded as A. cingulata.

• A. proboscidea (Greg.?) Cl., 1894–5. (Petit, 1877, 18.) Foveaux Strait.

• A. pulchra Grev., 1863 c. Curtis Island (type loc.).

• A. schmidtii Grun. in A. S., 1875. (Petit, 1877, 17) Foveaux Strait.