The anal papilla is nearly in the centre of the branchial crown. The mantle-flap^* is of nearly the same breadth throughout; its under-surface smooth. The foot is rounded in front, with well-defined marginal groove; the margin is not very narrow; the tail short.

[Remarks (p. 33).] From its coloration this form probably represents a new species; possibly it is identical with one or other of the “species” recently described from the Pacific Ocean.^†

[I confess I do not understand the above remark. If it is merely its coloration that distinguishes it, it seems scarcely probable that that would justify the formation of a new species. I may note that Sir G. Eliot, in his account of the “Nudibranchs of East Africa and Zanzibar,”^‡ suggests that his A. africana may be identical with this species, and A. umia with A. nanntla. It is rather odd that Bergh does not refer to Abraham's paper in the Proc. Zool. Soc. 1877, in which several opisthobranchs from our coasts are described and figured. It is evident that all our nudibranchs require working over carefully, for it seems likely that the littoral forms have received more than one name. It will be seen, later, that in the case of other species there is the same hesitation or doubt as to its novelty or otherwise. Unfortunately, the valuable memoirs that Bergh has been publishing for some years past are very much too expensive for individual workers to purchase, and none of our libraries possess the work.]

A. nannula, Bergh, n. sp. [p. 33], p1. iii., fig. 2.

Of this form Benham has forwarded seven individuals, obtained at Port Chalmers, Otago Harbour. [I collected some dozens of this bright little species when the s.s. “Ringarooma” was in dry dock, after being at moorings for about a year in Deborah Bay, amongst the seaweeds, Bryozoa, sponges, &c., adhering to the bottom of the ship. I collected a considerable number of interesting animals, amongst others the Goniodoris castanea, referred to above.]

[Colour.] During life they are light—orange—coloured. In alcohol the seven individuals agree pretty well in colour, size, and form. They were entirely yellowish-white.

[Dimensions.] The length averages about 18mm., with a breadth up to 14mm., and a height of 3 mm.; the breadth of

the mantle-flap is about 14mm. [sic.: probably a misprint]. The height of the gills is 4.5 mm.; breadth of the foot, 7 mm.

[Externals.] Form as usual. The back is entirely covered with almost hemispherical papillae, not very variable in size, but somewhat smaller at the mantle-edge. The club of the rhino-phore is much foliated, the foliae stiffened in the usual way with long spicules. The branchial region is in all the individuals much everted, and surrounded by the narrow lip of the distended gill-opening (which measures 6 mm. in diameter). The gill is formed of five to seven tripinnate members: the upright anal papilla completes the branchial circle posteriorly. The under-surface of the mantle-edge is smooth; the tentacles appear to be shortly conical; the foot is fairly broad, rounded in front, with a short tail.

[Remarks (p. 34).] This form is undoubtedly an Archidoris, but whether it represents a distinct species must remain for the present undecided.

Archidoris, sp. [p. 34].

The single specimen obtained by Benham at Kaikoura, on the east coast of the South Island, was, in life, pale-orange in colour.

[Colour.] The specimen in alcohol was much hardened, broken, somewhat contracted, and uniformly light-yellowish.

[Dimensions.] Length, 23 mm.; breadth, 16 mm.; height, 10 mm. Breadth of mantle-flap, 3 mm.; of the foot, 13 mm. The height of the rhinophore, 2 mm.; the diameter of the circular branchial aperture is 4 mm.; height of the gill, 3 mm.

The animal was somewhat hard and stiffened; the back fairly smooth, but finely granulated towards the margins; the rhinophores, lying far forward, has its club much foliated. The foot is large; its margin not broad; the tail short.

[Remarks (p. 35).] This form is probably identical with one of the recently described species of the genus.

Homoiodoris, Bergh, 1881.

Hitherto only one species of this genus, H. japonica, has been described, and this from the South Japan Sea.

H. novae-zealandiae, Bergh, n. sp. [p. 35], p1. iii., figs. 3–7.

Of this form five individuals were received from Mr. H. Suter, who collected them at Port Chalmers.

[Dimensions.] The specimens preserved in alcohol had a length varying from 12–20 mm. In the largest individual the breadth of the body is 13 mm.; the height, 7 mm.; the width of the mantle-flap is 3.5 mm.; that of the border of the foot is 3 mm.: the length of foot is 16 mm.; its breadth, 7 mm.;