554 PROCEEDINGS OF THE ACADEMY OF [NOV.^ 



Tritogonia verrucosa Raf. 



Obliquaria verrucosa {U. verrucosa) Raf. Monogr. (1820), p. 304, No. 26, 

 PI. 81, figs. 10, 11, 12. 

 The types are A. N. S. P. Coll. No. 20,235, from the Ohio River. 

 Length 100, height 56, diam. 32 mm. 

 Length 93, height 53, diam. 28 mm. 



This is Tritogonia tuherculata Bar. (1823) of Simps. Synops., p. 

 608, Descr. Catal., p. 318. Unio tuherculata Bar. (1823) is preoccupied 

 by Unio tuherculata Raf. Monogr. (1820), pp. 308, 311, ,312. 



Cyprogenia stegaria Raf. 



Obovaria stegaria (Unio stegaria) Raf. Monogr. (1820), p. 312, No. 49, PI. 82, 

 figs. 4, .5, var. 1, tuherculata Raf. 



The type is A. N. S. P. Coll. No. 20,241, from the Ohio River. 



Length 47, height 49, diam. 32 mm. 



This is Cyprogenia irrorata Lea (1830) of Simps. Synops., p. 610, 

 Descr. Catal., p. 326. The name tuherculata is preoccupied by Raf. 

 Monogr. (1820), p. 308, No. 37. 



Obliquaria reflexa Raf. 



Obliquaria reflexa {U. reflexa) Raf. Monogr. (1820), p. 306, No. 31. 



The types are A. N. S. P. Coll. No. 20,206, from Letart Falls. 

 Length 54, height 49, diam. 34 mm. 

 Length 50.5, height 46.5, diam. 35 mm. 



This is Ohliquaria reflexa Raf. of Simps. Synops., p. 611, Descr. 

 Catal., p. 330. 



Ptychobranchus fasciolaris Raf. 



Obliquaria fasciolaris {U. fasciolaris) Raf. Monogr. (1820), p. 303, No. 2.5. 



The type is A. N. S. P. Coll. No. 20,253, from the Kentucky River. 

 Length 81, height 49, diam. 28 mm. 



This is Ptychohranchus phaseolus Hild. (1828) of Simps. Synops., 

 p. 612, Descr. Catal., p. 333. 



Lastena lata Raf. 



Anodonta lata {Lastena lata) Raf. Monogr. (1820), p. 317, No. 59, PL 82, 

 fig.s. 17, 18. 



The type is A. N. S. P. Coll. No. 20,227, from the Kentucky River. 



Length 61.5, height 25, diam. 13 mm. 



This is Lastena lata Raf. of Simps. Synops., p. 654, Descr. Catal., 



p. 453. 



Symphynota viridis Raf. 



Unio viridis (Elliptio viridis) Raf. Monogr. (1820), p. 293, No. 3, var. 2, 

 fuscata Raf. t.c, p. 294. 



The type is A. N. S. P. Coll. No. 20,219, from the Kentucky River, 



only one valve. 



