32 G.'i^exiW— List of tJieMolhisesi of [No. 1, 



of Keeve, but a trifle smaller. A few specimens only were found at Ka- 

 byuet. 



Long. 29^, diam. 21 mil. 



Paludt]!^a siamensis, v. Fr., var. ? 



Vivijoara Siamensis, v. Fr,, Zool.-bot. Ges., Wien, 1865, pi. 22, (Siam). 



The Museum possesses a single typical specimen from Siam, which 

 seems to j)resent no distinctive characters, except in its greater size, from 

 the numerous, but all unfortunately young, specimens found alive at the 

 Second Defile of the Irawady and at Yaylaymaw. 



Paltjdina Bengalensis, Lam., var. doliaeis, Gld. 

 Paludina hengalensis^ Lam., var. digo7ia, Blf,, P. Z. S., 1869, (Bhamo.) 

 P. doUaris, Gld., Proc. Bost. Soc, vol. I. p. 144. 



Countless varieties of this well known shell are to be found everywhere 

 throughout the Indian region. The form from Bhamo, called var. digona 

 by Mr. Blanford, tke type of which is in the Museum, is very incorrectly 

 figured in the ' Con. Indica,' pi. 115, fig. 7, the characteristic angulation 

 of the last whorl not being shown ; it is apparently the widest spread variety 

 of all ; in the Museum are specimens almost undistinguishable from ono 

 another from Calcutta, Mandalay, and Siam (received from Morelet as " P. 

 lineolata, Mouss."). A small and less angular form of var. fZ/^co^^^ was obtain- 

 ed at Myadong, having the last whorl more produced and separated. Another 

 form sent me by M. Morelet from Cochin China as " P. poli/gramma, 

 Mart.", is also found in Pegu and Calcutta. An interesting form near 

 var. digona was found at Shuaygoomyo : it differs by the remarkably 

 developed transverse sculpture, by the peculiar green of the epidermis, 

 which has less of a yellow tinge, and by the umbilicus being more 

 open than in any other specimens I have seen of this protean sliell ; this 

 form is near P. oxytropis, Bens. (Con. Indica, pi. 76, fig. 5) from Muni- 

 pur, though the latter I consider a good and distinct species. Since the pre- 

 ceding was written, M. Morelet has suggested (Ser. Conch. IV, p. 306), that 

 probably both P. poly gramma and P. lineolata are merely varieties of P. 

 Bengalensis ; he states that both forms are found in Cochin China, and he 

 identifies the two former for certain as merely varieties of P. sumatrensis^ 

 Dkr,, Mai. Bl. 1852, 



MeLAKIA (StRIATELLA) TrBEECIJLATA, Mllll. 

 Nerita tuherculata, MiilL, Hist, Verm,, p. 191, (Coromandel) . 



Two forms of this very common and variable shell were found abun- 

 dantly in the old channel of the Irawady at Myadoung ; the commoner of 

 the two somewhat resembles pi. 74, fig. 1, of the ' Con. Indica,' but is 

 more richly coloured, with the brown band at base remarkably broad and 



