I9I4-] H. H. Godwin- Austen : Mollusca, IT. 363 



deferens joins at the base of this. The amatorial organ is pre- 

 sent, very large and long, bent sharply on itself and held thus 

 in this position by quite a net work of fine muscles. The sperma- 

 theca is short thus corresponding to the short spermatophore, 

 the ovotestis and prostate together are not at all like what is seen 

 in true Macrochlamy.'^, the convolute sacs of the first are short and 

 form a very conspicuous regular row 



The radula is notable from its very dark colouration, confined 

 to the subradula membrane on which it rests, and thus conforming 

 to other parts of the animal, especially the visceral sac. This cha- 

 racter constitutes it a dark race. The formula is 50. 3. 12. i 12. 

 3. 50. The central and admedians are of the usual form, the 

 marginals bicuspid, at first elongate narrow, lying close together, 

 rather straight, with cusp far below the point, rising higher and 

 higher, those near the margin itself shorter and evenly bicuspid. 



Jaw is very solid, much arched above, nearly straight in front, 

 only slightly concave, differing from any that I can remember 

 having seen before. 



Until I had seen the genitalia I had placed this mollusc in 

 Macrochlaiuys ; thej^ were however a surprise to me, the penis did 

 not present the well-known typical characters of that genus. It 

 at once recalled that of Sarmna kala from Damsang, Baling Dis- 

 trict of Western Bhutan, while the form of the shell although much 

 larger and the very dark colouration of the animal are common to 

 both. We have here in the Abor countrj^ 420 miles to the east- 

 waid a very close ally of S. kala, but differing in one character 

 only, the presence of an amatorial organ or dart sac which the 

 type of the genus does not possess. It modifies to this extent the 

 description of the genus Sarama, one I felt necessary to constitute 

 and published in the ' Fauna of British India," p. 275, 



The interest attaching to the distribution is ve y great, par- 

 ticularly with regard to species of Sarama which no doubt remain 

 to be found in the long stretch of intermediate mountain country, 

 linking up the two species. 



