1858.] Notes on some Indian freshwater Shells. 315 



18. N". Cryptospira,* B. TeDasserim river. This little species 

 occurs abundantly on stones in rapids just above the tideway. 



19. JN". Fuliginosa, # n. s. mihi. — Testa neritinseformi, subglobosa, 

 spira minima; colore luteo-flavescente rubro reticulata ; intus flaves- 

 cente-pallida ; aliquando cserulescente ; non raro fasciis duobus cincta 

 in apertura facilius visis. Epidermide plerumquenigro colore, extraneo 

 fucato ; semipolita, operculo pallide aurantiaco, margine anteriore 

 rubro. Longitudinis 0.40. Habitat in regno Burmanorum proper 

 urbem Amrapoora sive Ava dictam. Teste, T. Oldham. 



Order. Pulmonieera. 

 Family. Limn^idve. 

 Limncea. Lam. 



20. L. Succineus, Desh. — Prome, common. 



Planorbis. Midi. 



21. P. Coromandelicus, Fab. — Prome and Rangoon, &c. Common 

 but not large. 



Class. CoNCHIEERA. 



Family. Arcade. 

 Scaphula. JB. 



22. S. Pinna,* B. — Tenasserim river within the tideway but in 

 freshwater. This species appears to have been previously noticed 

 and recorded as a Dreinnia in Mason's work on the Birmese Fauna, 

 till I forwarded specimens to Mr. Benson, who described the species 

 in the annals of Natural History for 1856. It adheres firmly by 

 means of a short byssus to porous rocks (Laterite) in the cavities 

 of which it nestles. 



Family. TIhtonid-E. 

 Unio. Metr. 



23. U. cajruleus, Len. — Thaiet-mio in small streams and feeders 

 of the Irawadi, not large or common. 



24. TJ. erispisulcatus,* B. — Very common in small streams near 

 Thaiet-mio, where it is eaten by the Birmese, 1.96 — 1.23. 



25. TJ. Pugio,* B. Irawadi river near Ava. Procured by Mr. 

 Oldham. 



26. U. marginalis, Lam. ? — An allied species, if not a variety of 

 this shell occurs near Prome, 4.30 — 2.00. 



