AMPHIDEOMUS. 185 



Hah. Andaman Islands : Cocos Island and Port Blair ( Oodivin- 

 Aiisten); Mt. Harriet, Andaman Island {Roepstorf , Nevill, 

 Stoliczlcd). Nicobar Islands : Katcball (Stoliczka). 



This species has not previously been described and is known 

 only from the figure in Conch. Ind. copied by Pilsbry. The 

 above description is drawn up from a number of specimens in my 

 own collection. Mr. Fulton considers it variety of A. furcillatus, 

 Mousson, a Javanese shell, but Prof. Pilsbry, while admitting that 

 the similarity in coloiu'ing to tliat species and A. quadmsi, from 

 Balabac, is remarkable, thinks it inadvisable, on account of the 

 widely separated localities, to unite (indanianicus with either. I 

 do not, however, consider the similarity in colouring particularly 

 striking, as in the other two species the prevailing ground-colour 

 is a bright yellow, and I have never seen the infra-peripheral and 

 columellar bands, so characteristic a feature in A. andamanicus, in 

 either. A. furcillatus, moreover, is a more slender species and 

 has the columella more oblique and the aperture proportionally 

 less high. 



On the other handi A. pictns, Fulton, also from Java, bears a 

 striking resemblance in its pattern of marking to the Andaman 

 shell, having several of the transverse bars forked above and 

 exhibiting likewise the infra-peripheral and columellar spiral 

 bands. It has also the same conical contour, but lacks the green 

 colouring on the last whorl frequently seen in A. andamanicus, 



Lt.-Col. Godwin- Austen, in discussing the form from the 

 Nicobar group, states that "it is somewhat larger than Andaman 

 shells, and in colour is far paler and with few markings, and those 

 pale. These differences might not hold good in a large series." 



Subgenus Beddomea, NevUl. 



Amphidrnimis, subgenus Beddomea, Nevill, Hand List, i, 1878, 

 p. 127 ; Pilsbry, Proc. Malac. Soc. Loudon, iv, 1901, p. 158, pi. 16 

 (anatomy); ibid., Man. Conch, ser. 2, xiv, 1901, p. 1, pi. 2, 

 figs. 21-23 (anatomy). 



Type, Bidimus ceylanicus, Pfeiffer. 



Range. Southern India and Ceylon. 



" Shell umbilicate or perforate, oblong-conic, often carinated at 

 the periphery, \^ bite or \\\\\\ brown bands or streaks ; aperture 

 usually quite obhque ; peristome reflexed. 



"Genitalia of typically epiphallogonous type, the flagellum 

 longer than and the ephiphallus about as long as the penis. 

 Duct of the oblong or ovate spermatheca lengthened, more than 

 double the length of the penis. Penis with a large apical 

 papilla. 



" Lung having the pulmonary vein without large branches, the 

 venation densest on the intestinal side and near the pneumostoma, 

 weak or well developed on the cardiac side. Kidney long and 



