Benham. — Nudibranch Molluscs jrom Nexo Zealand. 317 



the mantle-flap is about 14 mm. [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 folise 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 cir- 

 cular 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], pi. hi., 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. ; 



