NO. 1205. SYNOPSIS OF THE NAIADES— SIMPSON. 805 



or left 5 beaks rather high, anterior; beak sculpture apparently a few 

 coarse, subparallel nodular ridges curved up behind; posterior ridge 

 low, close to the hinge line, and in front of it the shell is full; surface 

 slightly, irregularly, concentrically striate; epidermis dark, having a 

 peculiar, dull, silky luster; hinge rather narrow; pseudocardinals two 

 in the left valve immediately under the beak, the anterior compressed, 

 high and nearly parallel with the outer edge of the shell, the posterior 

 heavy, joined to the anterior above, with a deej), triangular cavity 

 between; right valve with one large, triangular, anterior pseudocardinal 

 with a deep, triangular pit back of it, and often a small, low, com- 

 pressed tooth behind the pit; laterals granularly striate, beak cavities 

 rather deep; anterior muscle scars deep, rough at the bottom; poste- 

 rior scars large, long and oblique; nacre silvery, sometimes radially 

 striate at the edge; palleal line indented into a sinus at its posterior 

 end, above which is a granular, striate callus. 

 Animal unknown. 



fCUNEOPSIS CAPITATUS Heude. 



* TJnio cajjitatns Heude, Jl. cle Couch., XXII, 1874, p. 114 ; '' Conch. Fluv. Nauk.,I, 



1875, pi. 11, fig. 5.—** P.ETEL, Conch. Sam., Ill, 1890, p. 147. 



China. 



fCUNEOPSIS HEUDEI Heude. 



*Unio lieudei Heude (Bazin manuscript), Jl. de Conch., XXII, 1874, jl 114. — 

 ** P.ETEL, Conch. Sam., Ill, 1890, p. 155. 



* Unio corderii Heude, Conch. Fluv. Nank., 1, 1875, pi. i, fig. 3.' — ^'P.etel, Conch., 



Sam., Ill, 1890, p. 149. 



China. 



iCUNEOPSIS CELTIFORMIS Heude. 



*" Uiiio celtiformis Heude, Jl. de Conch., XXII, 1874, p. 113; Conch. Fluv. Nank., I, 

 1875, pi. I, tig. 4.—* P.ETEL, Conch. Sam ., Ill, 1890, p. 147. 



China. 



tCUNEOPSIS PISCICULUS Heude. 



" TJino insciculus Heude, Jl. de Conch., XXII, 1874, p. 115; *Conch. FIua'. Nank., I, 

 1875, pi. II, figs. 6, 6a.—* P.etel, Conch. Sam., Ill, 1890, p. 163. 



" Unio retortiis von Martexs, Sitzber. Ges. Nat. Fr., 1875, p. 4; "Mai. Blatt., XXII, 

 1875, p. 188; Nov. Conch., IV, 1876, p. 158, pi. cxxxvi, figs. 3, 4.2— *P^tel, 

 Conch. Sam., Ill, 1890, p. 165. 



China. 



tCUNEOPSIS RUFESCENS Heude. 



"Unio VKfencens Hkudk, Jl. de Conch., XXII, 1874, p. 113; Conch. Fluv. Nank,, I, 

 1875, pi. I, fig. 2.—* PyETEL, Conch. Sam., Ill, 1890, p. 166. 



China. 



' Changed to corderi by Heude in above reference. 



•^ Von Martens places this in the synonymy of U. piscicuhis in Vol. lY of the Nova- 

 tites Conchologria. 



