242 



Notes on some Indian and Burmese Ilclicidw. 





[No. 8, 



The whole are so closely united as to be separable only one from 

 another by the most arbitrary division. They may naturally be ranged 

 thus : — 



fJEE. JSTagporensis, Pfr* Central India. 



II. unicincta, B. (H.propinqua, Bfr. Central India, Bombay. 

 H. asperella, Bfr. Central India. 



M «{ H. fallaciosa, Mr. Ceylon, South India, 



H. ruginosa, Mr. Southern India, 



H. crassicostata, B. Salem (?). 



{JH. Helferi, B, Andamans. 



H. climactebica, B. Mo one on first examining a type-specimen 

 of this shell of twenty-one mills, in diameter, would imagine there 

 was any Indian shell very closely connected with it, but on examin- 

 ation of the small variety of from thirteen to fifteen mills., (for which 

 I propose the term H. geiton, " yenw") a close relation is perceptible 

 between it and H. pansa, B. on the one side and H. omatissima on 

 the other. The type form of H. climacterica is very peculiar, and is 

 seen also in the smaller H. geiton, but in this last it is more subject 

 to variation, so that some specimens are not much more keeled 

 ih&nH. pansa, B. whilst others unite this extreme form with the type. 

 3?he main distinction seems to be, a more closed umbilicus in II. 

 climacterica, than is observable in the others ; a stouter shell more 

 strongly keeled and more deeply sculptured. II. omatissima whilst 

 closely resembling the type as regards sculpture, departs irom it in 

 being less keeled, and in its umbilicus being more open, whilst H. pansa, 

 B. is usually far less strongly sculptured than the type and thinner, but 

 is more keeled and has a closer umbilicus than H. omatissima. H. 

 anopleuris, B. is merely a stout handsome II. omatissima, on a large 

 scale, ranging from fifteen to twenty-one mills, in diameter, my largest 

 -HT. omatissima being but sixteen mills. Intermediate forms there 

 doubtless are, but the natural arrangement seems to be thus — 

 II. climacterica, B. Khasi Hills. 



Khasi Hills, (a dwarf climacterica). 



Irawadi valley. 



Darjiling. 



Hills North of Tirhoot (Soomeysur hill). 



Ditto ditto. 



H. geiton, Th. 

 II. pansa, B.% 

 II omatissima, B. 

 II. anopleuris, B. 

 JI suhmissa, _S. # 



Aji equal amount of variation in the keel may be often remarked 



