fi-2 



CONCHOLOGIA INDICA. 



2. U. parma? var. BeHson. 

 Blianiao. 



May possibly bo a distinct species, but having seen 

 bat one specimen we do not venture to decide. 



'•'>. U. rugosus, Gmel. Syst. Natnr. f. 3222, for 

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

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

 Coromandel. 



Between macilenta and scobina. A single valve 

 has been lately obtained which more precisely re- 

 sembles the figure of Chemnitz. 



■i. U. Mandelayanus, Theobald, J. Asi. Soc. Beng. 

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

 Maudelay, Birmah. 



Specimens are occasionally of a rich grass-green. 



5. U. macUentus, var. 



Surat; near Chimoor; Pem Gunga. 



t>. U. Tavoyensis, Gould, Proc. Bost. N. H. vol. 1, 

 p. 140: Otia Con. jj. 191. — Ree^e, Conch. Icon. 

 Unio, f. 49. 

 Tavoy. 



Our specimen was sent by Gonld to Benson. 



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

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

 Birmah. 



Very much larger and rounder than the typical 

 form. ' 



India is the reputed habitat of many Uniones 

 which modern researches have failed to discover 

 there. Amongst them may be specified Spengler's 

 crassus (from Tangiers), his conns . (=tnmidus, 

 from Europe), his radiatns (from North America), ' 

 his nodosus (=the European pictorum), &c. Eydous i 

 ill Guerin's Magasin de Zoologie (1838, pi. 118) ' 

 indicates U. Keraudreni (f. 1) and TJ. GaudichardL 

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

 U. leioma, but looks more like a Cape shell), and 

 U. Gerbidoni (f. 2) from Coromandel : these two last 

 remind us of U. Niloticus and U. lithophagus, both 

 fi-om the Nile. The supposed Indian U. digitiformis ' 

 of Sowerby comes from China ; U. Bengalensis of Lea 

 from the Philippines. U. velaris of Benson and U. 

 delphinus of Speugler must, also, be esjjunged from 

 our list. 



PLATE CLV. 



UNIO, CORBICULA, CYCLAS, PISIDIITM, 

 TRICULA, ACHATINA. 



See previous plates cxxxviii for Corbicula, and xvii, 

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



1. T. montana, Benson, Calcutta J. Nat. H. 1842 : 

 An. Nat. H. 1862, Dec. 



From a stream at the head of Bheemtal, on 

 stems of a water iris. 



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

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



Near Bhamao, and from Western Prome, 

 Pegu. 



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



Birmah or Pegu. 7rx\ fftrhUn^ayr,,^, Ai/^ 



The English editor has lost the precise locality 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 Glessula of 

 so elongated a shape. 



6. Cor. Bengalensis, Desh. Proc. Zool. Soc. 1864, 

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

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



River Jumna. 



7. Cor. trigona, Desh. Proc. Zool. Soc. 1854, 

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

 Ann. Lye. N. Y. 186b, vol. 8, p. 221, f. 53. 



Pondicherry. 



This and the last are figured from the types in the 

 British Museum. 



8. Cor. Iravadica, Blanford, MSS. 



River Irawaddy, Pegu and Ava. 



This has been distributed by the author as pisum 

 and Iravadica. It has probably been published, but 

 the reference cannot be found at the moment of going 

 to press. 



9. Cy. Indica, Deshayes, Proc. Zool. 1854, p. 342, 



