810 GASTROPODA. [PmmoiiMa. 



Sculpture, : Notum with a very variable number of larger whitish 

 papilla?, and between them very small and numerous granules ; the 

 marginal glands are of the same size as the larger papilla 1 , round or 

 oval, whitish, equidistant, and numbering about 28 to 32 ; the hypo- 

 notum is finely granular. Colour black, the marginal glands and 

 usually also the larger papillae whitish ; front of the head and pos- 

 terior part of the hyponotum blackish, the rest of the under-surface 

 yellowish-white. The anus is hidden under the tip of the tail, and 

 behind it, in the median line, is the pneumostome. The hyponofa are 

 about half the width of the sole, or a little more ; the hyponotal lines 

 and the female genital furrow are distinct. Sole truncated in front, 

 narrowed and rounded behind, the sides minutely wavy through con- 

 traction in alcohol. 



Length over back, 18mm.; width over back. 11 mm. ; height, 

 4 mm. ; breadth of sole, 5 mm. (medium -sized alcohol specimen). 



Anatomy unknown. 



Type in the Mus. Hist. Nat., Paris. 



Hob. Campbell Island, type (Filhol, Captain Bollons) ; Auckland 

 Islands (Captain Bollons) ; Stewart Island (Professor Chilton). 



Remark. The specimens from Stewart Island which I have seen 

 are very small. 



2. Onchidella flavescens, Wissel, 1904. Plate 32, figs. 2, a. 



Oncidella flavescens, Wissel, Zool. Jahrb., Syst., xx, 1904, 668, pi. 25, f. 78, 79. 



Animal small, roundly oval, yellowish-white with a few brown 

 spots on the back and also encircling the margin, with roundish papillae. 

 Sculpture : Notum with rather distant round and not much raised 

 papilla? of unequal size. Colour yellowish-white with more or less 

 numerous small brown or blackish spots ; margin ' of noturn with 

 equidistant brown spots, between which the yellowish marginal glands, 

 19 to 24, are situated ; ventral surface yellowish- white. The pneumo- 

 stome is in the median line, midway between sole and perinotum. 

 Hyponota of about the same width as the narrow sole. 



Length, 7-8 mm. 



Jaw present, very delicate, colourless. 



Radula having the formula 150 + 1 + 150. Central and pleura! 

 teeth with very long basal plates ; the former with 3 cutting-points, 

 the median longer than the others ; pleural teeth with an inner broader 

 and an outer smaller cusp, with slight longitudinal lines. 



Digestive and reproductive orr/ans very similar to those of O. -patcl- 

 loides. 



Type in the Museum fur Naturkunde, Bremen. 



Hub. Chatham Islands ; Mangonui (Professor Schauinsland) ; 

 Auckland Harbour (H. S.). 



Remark. In the single specimen I found in Auckland Harbour the 

 papilla? are much less numerous than in Wissel's figure. 



