COJs^CHOLOGIA IXDICA. 



2. U. parma? var. Benson. 



Bhamao. 



May possibly be a distinct species, but Having seen 

 but one specimen we do not venture to decide. 



:i. U. rugosus, Gmel. Syst. Natur. f. 3222, for 

 Chemn. Conch. Cab. vol. 10, f. 1649 (=Kust.ed. 

 Chcmn. Un. pi. 97, f. 5). 

 , Coromaiidel. 



Ik'tween macilenta and scobina. A single valve 

 lias been lately obtained whicli more precisely re- 

 sembles the figure of Chemnitz. 



!•. TJ. Mandelayanus, Theobald, J. Asi. Soc. Beng. I 

 1873, p. 208, pi. 17, f. 2. | 

 Maudelay, Birmab. 



Specimens arc occasionally of a rich grass-green. 



■"). U. macilentus, var. 



iSurat; near Chimoor; Pern Giinga. ! 



h. U. Tavoyensis, Gould, Proc. Bost. N. H. vol. 1, | 

 j). 140: Otia Con. p. 191. — Rce7e, Couch. Icon. 1 

 Unio, P. 49. 



Tavoy. j 

 Our spetniueu was sent by Gould to lierison. 



7. XJ. Tavoyensis? var. — XJ. Tavoyensis, Kust. 

 ed. Chem. Unio, pi. 48, f. 2. 

 Binnah. 



Very much larger and rounder than the typical 

 I'orui. 



India is the reputed habitat of many Uniones 

 wliich modern researches have failed to discover | 

 there. Amongst them may be specified Spengler's ' 

 cnissua (from Tangiers), his conns (=tnmidus, 

 from I'hirope), his radiatus (from North America), 

 his iu)doaus ( = the European pictorum), etc. Eydoux 

 in Guorin's Magasiu do Zoologio (1838, pi. 118) 

 indieatos U. KiMaudreni (f. 1) and U. GaudicluuHli 

 (I". 3), as from Bengal (the first may, perchance, be 

 U. loioma, but look.s more like a Capo shell), and 

 U. Gcrbidoni (f. 2) from Coromandel : these twola^it 

 riMuiud us of U. Niloiicus and U. lithophagus, both 

 t rom Ihe Nile. The supposed Indian U. digitifovmis 

 ol Sdworin- eouH s from China ; U. Boug-alensis of Lea 

 from the riiilippiuos. U. volaris of Benson and U. 

 di>lphiuus of Spongier must, also, bo expunged from 

 our list. 



PLATE CLY. 



UNIO, CORBICULA, CTCLAS, PISIDIUM, 

 TEICULA, ACHATINA. 



See previons plates cxxxviii for Corbicnla, and xvii, 

 xviii, XXXV, xxxvi, Ixxviii, cii, for Achatina. 



1. T. montana, Benson, Calcutta J. Xat. H. 1842 : _ 

 An. Xat. H. 1862, Dec. 



From a stream at the head of Bheemtal, on 

 stems of a water iris. 



2. TJ. Bhamaoensis, Theob. J. Asi. Soc. Beng. 

 1873, pt. 2, p. 207, pL 17, f. 1. 



Near Bhamao, and from Western Prome, 

 Peg-n. 



3. U. Vulcanus, Hanley, Proc. Zool. Soc. 1875. 



Birmah or Pegu. 

 The English editor has lost the precise locaHty of 

 this lovely species. 



4. A. senator, Hanley, Proc. Zool. Soc. 1875. 



Cottyam Hills, S. India. 

 We have seen only four specimens (none perfect) 

 of this peculiar Glessnla. 



5. A. Isis, Hanley, Proc. Zool. Soc. 1875. 



Southern India. 

 The hair-like lines and narrow fillet (the latter not 

 a constant feature) are found in no other Glessnla of 

 so elongated a shape. 



t!. Cor. Bengalensis, Dosh. Proc. Zool. Soc. 1S54, 

 p. 344 : Cat. Brit. Mus. Vener. p. 224.— Prime, 

 Ann. Lyc. N. Y. 1866, vol. 8, p. 220, f. 52. 

 River Jumna. 



7. Cor. trigoua, Dosh. Proc. Zool. Soc. 1854. 

 p. 3 14 : Cat. Brit. ]Mus. Yener. p. 224.— Prime, 

 Ann. Lyc. N. Y. 186ti, vol. 8, p. 221, f. 53. 



Pondioherry. 

 This and the last are figured trom the types in the 

 British Museum. 



8. Cor. Iravadica, Blanford, MSS. 



Hiver Inwvaddy, Pegu and Ava. 

 Thi.s has been distributed by the author as pisum 

 aud Irav.idica. It has probably been pnbUshed, but 

 the reference cannot be found at the moment of going 

 to press. 



9. Cy. Indiea. Deshayos. Proc. Zool. lSo4. p. 342, 



