UNIO 7 PAN 
Unio SZECHENYII Neumayr. 
“Shell thick, very inequilateral. oval wedge-shaped, rounded 
in front, very much smaller behind, pointed, very much trun- 
cated, gaping; inflated anteriorly ; beaks not prominent, placed 
very far forward, much eroded. Hinge moderately strong; in 
the right valve a single, triangular, jagged cardinal tooth; 
in the left a small lamelliform anterior cardinal and a triangu- 
lar posterior one, which meet above at an obtuse angle. ‘The 
lateral teeth in both valves are long. Muscular impressions 
confluent, equally jiarge, the anterior deep, the posterior shal- 
low. Nacre white. Epidermis blackish-brown. 
Length 96, height 45, diam. 31 mm.” (Neumayr). 
Type locality, Pojang Lake, Kiu-kiang, Kiang-si Province, 
China. 
Unio ssechenvii Neumayr, Ergebnisse d. Reise Szecheny 
Ostasien. IT, 1898, p. 642, pl. u, fig. 1. 
“Among the described species. Unio corderti Heude is the 
nearest, but this species is very easily distinguished by the very 
pronounced gaping of the shell, greater size, more pointed 
form and darker epidermis. 
Unio pazi I,ea differs by its distinctly keeled and much less 
obliquely truncate posterior end, lamelliform cardinal teeth 
and very different color of the epidermis, moreover the descrip- 
tion does not say that the shell gapes posteriorly.” 
Unio FLExIcosus Neumayr. 
“Shell thick, inequivalve, very inequilateral, long oval, 
twisted, rounded in front, slightly keeled, pointed, obliquely 
truncate behind. Beaks not prominent, well anterior, much 
eroded. Hinge, in the left valve, which alone is known, with 
two very high, much compressed, jagged cardinal teeth, which 
unite and form a continuous ridge in a straight line, lateral 
tooth very long and strong. Anterior muscular impressions 
deep; posterior confluent, larger, very shallow. Nacre white. 
Epidermis blackish-brown. 
Length 95.5, height 43 mm.” (Neumayr). 
