844 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. xxn. 



tPARREYSIA TAVOYENSIS var. TRIEMBOLUS Benson. 



* Unio triembolus BENSON, Jl. As. Soc. Beug., XXXV, 1855, p. 144; *Anu. and Mag., 



X, 1862, p. 190. *HAXLKY and THEOBALD, Conch. Ind., 1876, p.-43, pi. cvn, 

 fig. 2. *PJETEL, Conch. Sam., Ill, 1890, p. 170. 



* t Unio lioungdaranicus TAPPKI:OM:-('ANEFRI, Aim. Mas. Civ.. VII, 1889, p. 341. 



Burma; ludia. 



tPARREYSIA VULCANA Hanley. 



* Unio vtilcanus HAXLEY, Pr. Zool. Soc. Loud., 1875, p. 606. * HANLEY and THEO- 



BALD, Conch. Ind., 1876, p. 62, pi. CLV, fig. 3.* P.KTEL, Conch. Saui., Ill, 1890, 

 p. 172. 



Burma; Pegu. 



tPARREYSIA FE^E Tapperone-Canefri. 



* Unio few TAPPERONE-CANKFRI, Ann. Mus. Civ. Gen., 2d ser., VII, 1889, p. 340.' 

 Meetan River, Burma. 



tPARREYSIA RAJAHENSIS Lea. 



(^* Unio rajahensis LEA, Pr. Am. Phil. Soc., II, 1841, p. 30 ; * Tr. Am. Phil. Soc., VIII, 

 1842, p. 239, pi. xxm, fig. 53; * Oba., Ill, 1842, p. 77, pi. xxm, fig. 53.* H. and 

 A. ADAMS, Gen. Rec. Moll., II, 1857, p. 495. ^CHENU, 111. Conch.. 1858, pi. 

 xxvi, figs. 3, 3a, 3&. *P.ETEL, Conch. Sam., Ill, 1890, p. 165. 



(* Hargaron ( Unio) rajalicnsis LEA, Syn., 1852, p. 25; 1870, p. 38. 



[ * Unio indlcus SOWERBY, Conch. Icon., XVI, 1866, pi. XL, fig. 222. 'HANLEY and 

 THEOBALD, Conch. Ind., 1876, p. 43, pi. cvn, fig. 1. 



* Margaron ( Unio) indicns LEA, Syn., 1870, p. 31. 



India. 



(Group of Parreysia rugosa.) 



Sliell rather solid, elliptical to 8ubtrapezoidal ; beaks full, with zig-zag- 

 radial sculpture and fine corrugations and granules over the surface 

 of the shell. 



tPARREYSIA RUGOSA Gmelin. 



*Mya riigosa GMELIN, Syst. Nat., 13th ed., 1788, p. 3222. - "Wooo, Gen. Conch. I, 

 1815, p. 109. *DiLLWYN,Cat. 1, 1817, p. 53. - WOOD, Ind. Test., 1825, p. 12, pi. 

 n, fig. 33 ; rev. ed., 1856, p. 16, pi. n, fig. 33. 



( *Unio rugosity KUSTEK, Couch. Cab. Uuio, 1862, p. 290, pi. xcvn, fig. 5. "Bi-AN- 

 roRD, Jl. As. Soc. Beng., XXXV, 1867, p. 137. *P.ETEL, Conch. Sam., Ill, 1890, 

 p. 166. 



Coromandel. 



'Not figured. Shells in the U. S. National Museum from Fea show this to be a valid 

 species. 



2 Gmeliu refers to the Mya corrugata magna, etc., of Chemnitz, in the Conch. Cab., 

 X, p. 376, pi. CLXX, fig. 1649. There is a shell in Lea's collection from the Vellaur 

 River, southeast India, which seems to be this species. 



