![Thumbnail: [Volume 76, 1946-47 page 543]](/journals/rsnz/images/rsnz_76/thumbnails/rsnz_76_04_0683_0543_ac_02.gif)
Ectocarpus Lyngb.
This large and cosmopolitan genus requires thorough revision so far as New Zealand is concerned. Little attempt has hitherto been made to segregate the various species, and but one endemic species has as yet been described. A tentative list only can be given. May (1939) questioned the specific distinction between Ectocarpus confervoides and E. siliculosus, but it is to be noted that Fritsch (1945). p. 39. fig. 4, and p. 53. fig. 5; recognizes both species as distinct.
Ectocarpus confervoides (Roth) Le Jolis (1863), p. 75; Harv. (1855), p. 222; May (1939), p. 537; Feldmann (1937), p. 104.
![Thumbnail: [Volume 76, 1946-47 page 544]](/journals/rsnz/images/rsnz_76/thumbnails/rsnz_76_04_0684_0544_ac_02.gif)
Yellowish-brown filamentous plants on rock, driftwood, or other algae, in pools or sublittoral.
Loc. distr.: Probably on most shores.
Geogr. distr.: N. Atlantic and Pacific Oceans, Circumpolar-subantarctic, Australia, New Zealand.
*Ectocarpus duchassaingianus Grunow? (1867), p. 45.
On Carpophyllum maschalocarpum, covering old fronds with low. continuous, hairy mats.
Loc. distr.: Bay of Islands (V.W.L.).
Geogr. distr.: West and East Indian seas, S. Pacific, N.Z.
*Ectocarpus elegans Thur. in Le Jol. (1863), p. 277; V. W. L. (1940), IV, No. 84 (=E. sanderianus Zan.).
On Carpophyllum plumosum in profuse, feathery, rather long tufts.
Loc. distr.: Bay of Islands (V.W.L.).
Geogr. distr.: Mediterranean, Scotland, N.Z.
Type loc.: Mediterranean.
*Ectocarpus granulosus (Smith) C. Ag. (1828), p. 45; Setch. et Gard. (1925), p. 426; V. W. L. (1947), XI, No. 254, in preparation.
Soft, brown, not lubricous tufts, 7 cm. high, on stones in shallow water or on Cladostephus verticillatus.
Loc. distr.: Pihama (V.W.L.).
Geogr. distr.: British and European seas, eastern and western North America, Cape of Good Hope, Juan Fernandez, N.Z.
Type loc.: Brighton, England.
*Ectocarpus indicus Sonder in Zoll. Verg. der Ind. Arch. gesam. Pft.; V.W.L. (1939), II, No. 28.
The author is inclined to retain the name of Sonder rather than earlier names applied to Atlantic and European species closely related to, if not identical with, it, namely, E. mitchellae Harv. and E. virescens Thur.
On low rock washed by sand on shelving beaches in the lowest littoral.
Loc. distr.: Bay of Islands, Ahipara (V.W.L.).
Geogr. distr.: In most warm seas.
Ectocarpus siliculosus (Dillw.) Lyngb. (1819), p. 131; Kylin (1933), p. 16.
Differs from E. confervoides in the possession of a terminal hair produced from its plurilocular structures which are much longer than those of the former.
Loc. distr.: Probably common throughout New Zealand.
Geogr. distr.: North Atlantic, Pacific Ocean, Circumpolar-subantarctic, N.Z.
*Ectocarpus warnocki Kuehne (1946), p. 43.
Minute plants, 6–10 mm. high, on flat rock.
Loc. distr. and type loc.: Long Beach, Russell, Bay of Islands. Endemic.