1915.] NATURAL SCIENCES OF PHILADELPHIA. 557 



Length 31, height 26, diam. 7 mm. 



Thi$ is probably Quadnda pustulosa Lea (1831) of Simps. Synops., 

 p. 780, Descr. CataL, p. 848. 

 This is not Unio retusa Lam. (1819). 



Quadrula pustulosa pernodosa Lea. 



Ohliquaria hullata {U. hullata) Raf. Monogr. (1820), p. 307, No. 36. 



The type is A. N. S. P. Coll. No. 20,250, from the Kentucky River 



Length 54, height 52, diam. 28.5 mm. 



This is Quadnda pustulosa pernodosa Lea (1845) of Simps. Synops.. 

 p. 780, Descr. Catal., p. 851. This name U. hullata Raf. is pre- 

 occupied by Unio flexuosa var. hullata Raf. Monogr. (1820), p. 307, 

 No. 33, var. 1. 



Quadrula nodulata Raf. 



Ohliquaria nodulata {Unio nodulata) Raf. Monogr. (1820), p. 307, No. 34, 

 PL 81, figs. 17, 18. 



The types are A. N. S. P. Coll. No. 20,225, from the Kentucky 

 River. 



Length 51, height 43.5, diam. 31 mm. 



Length 29.5, height 21.5, diam. 8 mm. (one valve). 



This is Quadrula pustidata Lea (1834) of Simps. Synops., p. 781, 

 Descr. Catal., p. 856. 



Quadrula flava Raf. 



Ohliquaria flava {U. flam) Raf. Monogr. (1820), p. 305, No. 28, PI. 81, 

 fig.s. 13, ii. 



The type is A. N. S. P. Coll. No. 20,230, from small creeks in 

 Kentucky. 



Length 46, height 36, diam. 18 mm. 



This is Quadnda ruhiginosa Lea (1829) of Simps. Synops., p. 786, 

 Descr. Catal., p. 872. 



Quadrula obliqua Lam. 



Ohliquaria laleralis (U. lateralis) Raf. Monogr. (1820), p. 310, No. 43. 



The types are two valves, A. N. S. P. Coll. No. 20,247, from the 

 Kentucky River. 



Length 75, height 67, diam. 20 mm. 



Length 71, height 62, diam. 20 mm. 



This is Quadnda obliqua Lam. (1819) of Simps. Synops., p. 788, 

 Descr. Catal., p. 881. • " 



Quadrula rubra Raf. 



Ohliquaria rubra {U. rubra) Raf. Monogr. (1820), p. 214, No. 54. 



The type is A. N. S. P. Coll. No. 20,237. 

 Length 87, height 66, diam. 40 mm. 



