Cremnobates.] GASTROPODA. 595 



specimens, which are more or less corroded. Spire conic, typically 

 of the same height as the aperture, but considerably lower in all the 

 specimens from the Antipodes Islands. Protoconch minute, pointed. 

 Whorls 4, the last very large, convex, a little flattened outside the 

 suture ; base flatly convex. Suture deep. Aperture vertical, ovate, 

 angled above, rounded below. Peristome continuous. Outer lip thin 

 and sharp, broadly arched. Ba^sal lip regularly convex. Columella 

 slightly oblique, with 2 strong white plaits, the upper one larger, near 

 the top of the aperture, the lower one smaller and at about the middle 

 of the columella. Inner lip smooth, white, spreading a little beyond 

 the columella and uniting the margins of the peristome by a distinct 

 sharp ridge. There is no trace of an umbilical fissure. 



Diameter, 5 mm. ; height, 7-5 mm. (largest specimen, from the 

 Antipodes Islands). 



Animal, jaw, and radula as described for the genus. 



Type in Dr. Milligan's Museum. 



Hob. Antipodes Islands (Captain Bollons). The type is from 

 Oyster Cove, near Hobart, Tasmania. 



Remarks. On examining the shells with the animals, kindly 

 brought and presented to me by Captain Bollons, I came to the con- 

 clusion that they belonged to a genus of the Auriculidce unknown 

 to me, and perhaps new. However, I would not create a new genus 

 without having consulted my friend Mr. Hedley, so I sent him a 

 few specimens. He wrote to me, ' ' The Auriculid from Antipodes 

 is most interesting. It is certainly Cremnobates parva, Swainson, a 

 rare and little-known form. Both genus and species have been 

 generally ignored in subsequent literature." He also sent me at 

 the same time all the necessary references, and a figure, which is 

 reproduced in the atlas, for all of which I am very much obliged to 

 mv friend. 



j 



All the shells from the Antipodes have the spire considerably 

 shorter than the aperture, but this would hardly appear to be suf- 

 ficient reason for establishing a variety or subspecies. The type, 

 figured by Swainson, has the height of the spire equal to that of the 

 aperture ; the total height is 7 mm. 



Fam. AMPHIBOLIMJ, Adams. 



Animal having a large flattened disc-shaped head, lightly sinuated 

 in front ; eyes sessile, at the bases of the 2 small flattened triangu- 

 lar tentacles ; pulmonary opening on the right side. Visceral mass 

 spirally coiled ; the sexes united, male genital orifice near the right 

 eye. There is no jaw. Radula tongue-shaped, teeth in transverse 

 lines. Central tooth multicuspidate ; 2 laterals on each side, the 

 inner small, unicuspidate, the outer tricuspidate ; marginals unciform. 



Shell spiral. Operculum present. 



