NO. 1205. SYNOPSIS OF THE NAIADES SIMI'SOX. 843 



t riparians LEA, Pr. Ac. N. Sci. Phila., VII, 1863, p. 190; Ml. Ac. X. Sci. 

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

 *Maryaron ( Unio) tripartitus LEA, Syn., 1870, p. 35. l 



* Uniofacidens var. marcens BENSON, Ann. and Mag., X, 1862, p. 188. 



* Utiio marcens HANLKY and THEOBALD, Conch. Ind., 1876, p. 19, pi. XLII, figs. 



4-6. * P.ETEL, Conch. Sam., Ill, 1890, p. 158. 



* Unio smaragdites BENSON, Ann. and Mag., X, 1862, p. 190. * BLANKOUD, Jl. As. 



Soc. Beng., XXXV, 1866, p. 147.' HANLEY and THEOBALD, Conch. Ind., 1876, 

 p. 5, pi. x, fig. 5.* P^TEL, Conch. Sam., Ill, 1890, p. 167. 



PARREYSIA FAVIDENS var. PINAX Benson. 



* Unio pinax BENSON, Ann. and Mag., 1862, p. 192; *J1. As. Soc. Beng., XXXV, 1866, 



p. 144. 



* Unio favideits var. pinax HANLEY and THEOBALD, Conch. Ind., 1876, p. 6, pi. x, 



fig. 2. " P.ETEL, Conch. Sam., Ill, 1890, p. 152. 



PARREYSIA FAVIDENS var. PLAGIOSOMA Benson. 



*Unio plagiosoma BENSON, Ann. and Mag., X, 1862, p. 191; *J1. As. Soc. Beng., 

 XXXV, 1866, p. 144. 



* Unio favidens var. plagiosoma HANLEY and THEOBALD, Conch. Ind., 1876, p. 6, 



pi. xi, fig. 3.* P^TEL, Conch. Sam., Ill, 1890, p. 152. 



India. 



t PARREYSIA BHAMOENSIS Theobald. 



* Unio Mamoensis THEOBALD, Jl. As. Soc. Beng., XLII, 1874, Pt. 2, p. 207, pi. xvn, 



fig. 1. * ? HANLEY and THEOBALD, Couch. Ind., 1876, p. 62, pi. CLV, fig. 2. 



* P.ETEL, Conch. Sam., Ill, 1890, p. 146. , 



* t Unio mandelayensis THEOBALD, Jl. Aa. Soc. Beng., XLII, 1874, p. 208, pi. xvn, 



tig. 2.* HANLEY and THEOBALD, Conch. Ind., 1876, p. 62, pi. CLIV. fig. 4. 



* P.ETEL, Couch. Sam., 111,1890, p. 158. 



Burma. 



t PARREYSIA FEDDENI Theobald. 



*Uniofeddeni THEOBALD, Jl. As. Soc. Beng., XLII, 1874, p. 208, pi. xvn, fig. 3. 2 

 Peuugunga River, Central India. 



t PARREYSIA TAVOYENSIS Gould. 



*Unio lavoyensia GOULD, Pr. Bost. Soc. N. Hist., I, 1843, p. 140. *CATLOW and 

 REEVE, Conch. Nom., 1845, p. 64. *KUSTEK, Conch. Cab. Unio, 1856, p. 166, 

 pi. XLVIII, fig. 2. * GOULD, Otia Couch., 1862, p. ISO. * REEVE, Conch. Icon., 

 XVI., 1864, pi. xin, fig. 49. 3 -BLANFORD, Jl. As. Soc. Beng., XXXV, 1866, 

 p. 148. * HANLEY and THEOBALD, Couch. Ind., 1876, p. 62, pi. CLIV, figs. 6, 7. 

 *PJETEL, Conch. Sam., Ill, 1890, p. 169. 



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



* Unio savoyensin P.ETEL, Conch. Sam., Ill, 1890, p. 166. 



* Unio parma BENSON, Sowerby Couch. Icon., XVI, 1868, pi. xcv, fig. 514. 



* HANLEY and THEOBALD, Conch. lud., 1876, p. 61, pi. CLIV, fig. 1. * P.ETEL, 

 Conch. Sam., Ill, 1890, p. 162. 



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

 fandens have the same character, and there is much variation in this particular. 



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

 tion is a good deal like P. faridenx. 



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



