1895.] MOLLtrscA of the andamax a>'d kicobae islands. 451 



minute shells eight specimens of this very curious and interesting 

 species. 



Fig. B. 



Pupa (Pupisoma) constricfus. Xl2. 



Its sculpture is like that of Pupisoma llgnicola, StoL, from 

 Moulmein, and I think it better to place it near this than to 

 create a new genus for it, which I at tirst intended ; I think it is 

 best, however, to wait until some one else can examine the 

 animal. 



Genus Vagintilus. 



1. VAGINULtrS GIGANTEUS, n. sp. (p. 443). 



Locality. Andaman Islands {Harold Godwin-Austen). 



Animal elongate in form. Total length 68-0 mm. ; total 

 breadth 23'0 ; breadth of foot 9*0 ; female orifice 28-5 from the 

 extremity of the foot, 6'0 from the middle line of the foot, 1'5 

 from the pedal groove. The colour in the spirit-specimen is above 

 grey, with dark mottlings, paler near the head, and a narrow pale 

 hne down the centre of the back ; below dull ochre. Upper 

 surface smooth to the eye, under the lens closely pitted. The 

 sole of the foot narrow, slightly wider than the adjacent under 

 surface. The foot is crossed by rather close, very regular folds, 

 which form distinct grooves across it, very even in width ; there 

 are 22 such folds in 10 mm. of length, and each transverse fold is 

 divided by a very fine secondary groove. The tentacles, although 

 contracted, are large. 



This is a remarkably large species, 13 mm. larger than anything 

 described by Semper from the Indian region ; the largest mentioned 

 and figured by him is V. voifjtii, described from a specimen in the 

 Copenhagen Museum. Locality unknown. It differs from Semper's 

 drawing of this species in being narrower as compared with its 

 length, and in the sole of the foot. Semper's drawing is life-size, 

 and could not fail to show the transverse ridges. As I have 

 never yet dissected any species of this genus, I hesitate to begin 

 upon a single valuable specimen until I have had some practice 

 on well-known forms. 



G-enus Ctclophoeus. 



5. OxoLOPHOETJs (Cyclohelix) nicobaeicus, Behn (p. 444). 



This species is distinct from 0. crocatus or turbo, and is at once 

 distinguished by the very sinuate and oblique form of the 



29* 



