550 



Records of tlie Indian Museum. 



[Vol. VIII, 



square, mucous gland linear with a short overhanging lobe. The 

 right and left shell lobes united cover the edge of the shell for a 

 certain distance right round to the left posterior side, in life 

 they probably conceal the whole shell. Foot keeled near the 

 extremity for a short distance up to the depression in which the 

 hinder part of the visceral sac rests. The peripodial margm 

 grooves are narrow. The visceral sac exposed when the shell is 

 removed has a small hook-like coil which occupies the aoex of the 

 shell. 



The genitalia were not seen complete, they were very small 

 and undeveloped. 



The radula formula is 30.2. 12. 1. 12. 2. 30 or 44.1.44. The 

 centre and admedian teeth of usual shape in the allied genera of 

 Austenia and Girasia, but fewer than usual, the marginals curved 





,3b!»jdS^*^''^ 



I'lG. 2. — Austenia siyoiueitsis, n. sp. 



Animal view of right side ; shell removed showing the visceral sac ; shel 

 rem above and below. 



and bicuspid. Jaw rather straight in front with a small central 

 projection. 



Only three specimens were sent home of this species, the shell 

 of which is very different from any I have seen before. One speci- 

 men had lost the shell. The animal of the type shell removed and 

 figured was dissected. They will go back to the Indian Museum, 

 Calcutta. 



Austenia siyomensis, n, sp. 



(Text fig. 2). 



Locality. — Damda, Siyom Valley, Abor Hills (5. IF. Kemp). 



Shell broadly ovate, spatulate, bright and shiny; sculpture 

 none, surface smooth with fine lines of growth ; colour rich ochra- 

 ceous ; spire flat, apex large^ white and round; suture impressed ; 



