NO. 1205. SYNOPSIS OF THE NAIADES— SIMPSON. 843 



]*Unio iriiMriiius Lea, Pr. Ac. N. Sci. Phila., VII, 1863, p. 190; *J1. Ac. N. Sci. 



Phila., VI, 1866, p. 57, pi. xix, fig. 55 ; * Obs., XI, 1867, p. 61, pi. xix, fig. 55. 

 *Margaron ( Vnio) irvpartitus Lea, Syn., 1870, p. 35.' . 



* Unio favidens var. mareens Benson, Ann. and Mag., X, 1862, p. 188. 



* Unio mareens Hanley and Theobald, Conch. lud., 1876, p. 19, pi. xlii, figs. 



4_6._*p,ETEL, Conch. Sam., Ill, 1890, p. 158. 



* Unio smaragdites Bexson, Ann. and Mag., X, 1862, p. 190. — * Blanford, Jl. As. 



Soc. Beng., XXXV, 1866, p. 147.—" Haxley and Theobald, Conch. Ind., 1876, 

 p. 5, pi. X, fig. 5.—^ P.ETEL, Conch. Sam., Ill, 1890, p. 167. 



PARREYSIA FAVIDENS var. PINAX Benson. 



* Unio pinax Benson, Ann. and Mag., 1862, p. 192 ; "Jl. As. Soc. Beng., XXXV, 1866, 



p. 144. 

 ^ Unio favidens T&r. pinax Hanley and Theobald, Conch. Ind., 1876, p. 6, pi. x, 

 fig. 2.—* P^:tel, Conch. Sam., Ill, 1890, p. 152. 



PARREYSIA FAVIDENS var. PLAGIOSOMA Benson. 



*Unio jjZaf/iosoma Benson, Ann. and Mag., X, 1862, p. 191; "Jl. As. Soc. Beng., 



XXXV, 1866, p. 144. 

 ^ Unio favidens var. pJagiosoma Hanley and Theobald, Conch. Ind., 1876, p. 6, 



pi. XI, fig. 3.—^ P.ETEL, Conch. Sam., Ill, 1890, p. 152. 



India. 



t PARREYSIA BHAMOENSIS Theobald. 



* Unio hhamoensis Theobald, Jl. As. Soc. Beng., XLII, 1874, Pt. 2, p. 207, pi. xvii, 



fig. 1.—* ? Hanley and Theobald, Conch. Ind., 1876, p. 62, pi. clv, fig. 2.— 



* Pjetel, Conch. Sam., Ill, 1890, p. 146. 



* t Unio mandelayensis Theobald, Jl. As. Soc. Bang., XLII, 1874, p. 208, pi. xvii, 



fig. 2.—* Hanley and Theobald, Conch. Ind., 1876, p. 62, pi. clxv. fig. 4.— 



* P.etel, Conch. Sam., Ill, 1890, p. 158. 



Burma. 



t PARREYSIA FEDDENI Theobald. 

 ""Uniofeddeni Theobald, Jl. As. Soc. Beng., XLII, 1874, p. 208, pi. xvii, fig. 3.^ 

 Peuugunga Eiver, Central India. 



t PARREYSIA TAVOYENSIS Gould. 



*Unio tavoyensis Gould, Pr. Bost. Soc. X. Hist., I, 1843, p. 140.— "Catlow and 

 Reeve, Conch. Nom., 1845, p. 64.— " Kuster, Conch. Cab. Unio, 1856, p. 166, 

 pi. XLViii, fig. 2.—* Gould, Otia Conch., 1862, p. It^O.—* Reeve, Conch. Icon., 

 XVI., 1864, pi. XIII, fig. 49.3— ^Blanfokd, Jl. As. Soc. Beng., XXXV, 1866, 

 p. 148.—* Hanley and Theobald, Conch. Ind., 1876, p. 62, pi. cliv, figs. 6, 7.— 

 *P.etel, Conch. Sam., Ill, 1890, p. 169. 



^Margaron ( Unio) tavoyensis Lea, Syn., 1870, p. 31. 



* Unio savoyensis P^etel, Conch. Sam., HI, 1890, p. 166. 



^Unio parma Benson, Sowerby Conch. Icon., XVI, 1868, pi. xcv, fig. 514. — 



* Hanley and Theobald, Conch. Ind., 1876, p. 61, pi. cliv, fig. 1.—*P.etel, 

 Conch. Sam., Til, 1890, p. 162. 



' Lea claims that his species has triple laterals in the left valve. Specimens of 

 favidens have the same character, and there is mnch variation in this particular. 



^A young specimen in the U. S. National Museum collection from Morelet's collec- 

 tion is a good deal like P. favidens. 



^Gould did not figure this, but Reeve's figure agrees well with the types. 



