1880.] 



MSS. Drawings of Indian Lancl-mollushs. 



153 



foveola ior foventa, P£r. Java. 

 Mr. Edgar Smith agrees vyith me, on a comparison of the species in the 

 British Museum, that this is rimphi, Mus. Cuming. 



saccata, Pfr. Tavoy. 

 and this is only the young of retrorsa, Mus. Cum. 



Dr. C. Semper (Eeis. Arch. Philip, p. 50, 1870), on the character of 

 the horn above the tail-gland and foot, places one sinistral species {rumphi, 

 V. d. Busch.) and the following dextral shells in the sub-genus : — 



martini, Pfr. Sumatra. 

 nemorensis, Miill, 



javanica, Lamark Java. 



rarcguttata, Mouss. {Xasta) Adenare, near Timoro 



striata. Gray {Ifanina) Singapur, 



atrofusca, Albers. Singapur. 



It is very unlikely that these last six species from the islands of the 

 Malay Archipelago have any very close relationship) to the typical sinistral 

 Bombay species Icevipes, although the tail-gland does assimilate, and it 

 would be better to keep them, as well as all the other species from the 

 same region, separate for the present, as nothing is yet known of the anatomy 

 of the Indian species. Only those purely Indian forms which I distinguish 

 by antique type can be with certainty placed in this sub-genus. 



Pfeiffer has also, besides typical forms and others (Zeits. 1855) : — 



ammonia, Valenciennes, (sp. in Brit. Mus.) Habitat ? 



regalis, Bs., (I do not consider should be included.) Borneo. 



sannio, Pfr. Habitat ? 



atn^mUarioidcs, Eeeve (Mus. Taylor = cysis.) Nilgiris. 



linstedti, Pfr. (Mus. Cum.) Malacca, 

 is closely allied to rmipld, but it is sharper keeled, and, if the latter should 

 prove a true Arioplianta, it should also be included. 



Des Moulins founded his genus on the animal of a specimen which 

 had been sent to him alive from the island of Elephanta, Bombay, by 

 M. Tiioophile Latcrradc in March 1829. The moUusk lived some short 

 time and two drawings of it were made. Previous to this the shell only 

 had been described by Miiller. 



To M. Dos Moulins, therefore, belongs all the credit of first noticing 

 and distinguishing the very distinct and large group of Asiatic Helices 

 possessing a mucous pore at the extremity of the foot, and for which group 

 so characterized he proposed the title PHEEEPOEiE, placing the Bombay 

 shell in liis sub-genus Arioplianta. 



Dr. J. E. Gray four years afterwards, on the similar characters of 

 another but very distinct species, created the genus JYctnina, for Asiatic 



