COLLINGE : SOME NOTES ON THE GENUS PRISMA, SIMROTH. 131 



but they are not very satisfactory. As the type of the genus P. 

 toura line use, Soul.,''" is so beautifully represented, I have had two 

 coloured figures made of P. prismatira. 



The dimensions of the specimens in the collection of the British 

 Museum are : length of notum (in alcohol) 36'5, breadth 7, height 6 

 millim., breadth of foot-sole 2 millim. 



Hah. — An island in the Torres Straits, or New Guinea. 



The type, fiom the Island of Sorong, measured 38 millim. in 

 length. 



The foot-sole in this species is less than half the breadth of that 

 in P. smithi or P. heynemanni. 



Prisma heynemanni, Simr. 

 PI. ix, figs. 7-9. 

 Prisma heijnenianni, Simr. : Zeit. f. wiss. Zool., 189 1, Bd. Hi, p. 596. 



Colour of the notum greyish-yellow, spotted with blacK, closely and 

 finely graulated ; underside (perinotum?) ochreous, foot-sole same 

 colour ; keel prominent. Length of notum (in alcohol) 39, breadth 8, 

 height 6 millim. ■ Breadth of foot-sole 4*8 millim. Female generative 

 orifice 4^3 miUim. from the head. 



Hab. — Huon Gulf, New Guinea (Dr. Comrie). 

 Type in the collection of the British Museum. 

 Simroth '■'^' quoting Heynemann,'''' rightly gives the length of this 

 specimen as 39 millim., but Cockerell*'' states 36. 



Although our knowledge of this genus is as yet very imperfect, I 

 think there can be no doubt as to its distinctiveness from Veronicella 

 on the one hand, and Afopos, Simr., and liathouisia, Heude, on the 

 other. The examination of further material will alone indicate its 

 true position, and in connection with the members of this genus, as 

 also those of Atopos and liathouisia, the Testacella-like teeth may 

 possibly be concomitant with habits similar to the Testacellidae, which 

 future collectors would do well to bear in mind. 



My best thanks are due, and are here tendered to Mr.C.Butterworth, 

 for the care he has bestowed upon the figures, and to the Council of 

 the Royal Society, out of a Grant from which, the cost has been 

 defrayed. 



