144 Transactions. — Zoology. 



points, the inner larger and simply rounded at the end ; exterior marginals 

 with three cutting-points, the median the largest and rounded at the 

 end. 



Animal dark blue-black, sole of the foot yellowish. (Esophagus long, 

 narrow, and expanding suddenly into the stomach ; the intestine turns 

 forward to the left and passes round the aorta as in other species of the 

 genus, and its folds are much the same as in S. zealandica. The salivary 

 glands are elongated and connected together below the oesophagus. The 

 heart is pale yellow and situated on the left side. The penis is thick : the 

 ovotestis pale yellow. The nerve-collar is asymmetrical, the pedal, and 

 more especially the parieto-splanchnic ganglia being drawn over to the 

 right side ; there is an auditory vesicle on each of the pedal ganglia. 



Hab. Auckland Islands. 



Eeeve gives no locality for this species, but it has since been identified 

 as coming from Kerguelen's Land ; our species may prove to be distinct. 



Genus Gadinia, Gray. 



Shell conical, with a slight internal siphonal groove in front of the right 

 side of the muscular impression. Head distinct; tentacles, expanded funnel- 

 shaped ; pulmonary cavity with a gill placed obliquely across the back of 

 the neck. Jaw none. Eadula rather short, teeth quadrate, arranged in 

 angled transverse rows. 



Gadinia nivea. Plate XVII., figs. s. to v. 



Gadinia nivea, Hutton, Jour, cle Conchyliologie, 1878, p. 36. 



Shell ovate, depressed, white, with about forty radiating ribs ; apex 

 rather posterior, slightly uncinate. 



Length -75 or -8, breadth -7, height -15 to -2. 



Dentition, 60 ~g~ 60 , transverse rows forming an angle of about 90°, re- 

 entrant anteriorly. Jaw none. Central tooth with the reflexed portion 

 somewhat rectangular with four minute denticles on the oblique posterior 

 edge. Laterals about twenty-one, each with a long pointed cutting-point 

 and a small denticle on the inner side. Marginals with a long median 

 cutting-point and two small denticles on each side. 



Animal probably white, but the only specimen I have had, had been for 

 some time in spirit and was not in good condition. Buccal mass very large 

 and oval ; oesophagus short and as broad as the stomach, which turns 

 sharply to the right and passes gradually into the intestine. The intestine 

 passes backward, then curves to the left, then forward and to the right 

 passing over the pyloric end of the stomach, it then makes a complete 

 circle forward and to the left, and then passes straight to the anus which is 

 on the right side of the head. The reproductive orifice is situated between 

 the anus and the mouth. The penis is long, narrow, and straight, lying 



