1915.| NATURAL SCIENCES OF PHILADELPHIA. got 
Length 31, height 26, diam. 7 mm. 
This is probably Quadrula pustulosa Lea (1831) of Simps. Synops., 
p. 780, Descr. Catal., p. 848. 
This is not Unio retusa Lam. (1819). 
Quadrula pustulosa pernodosa Lea. 
Obliquaria bullata (U. bullata) 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 Quadrula pustulosa pernodosa Lea (1845) of Simps. Synops., 
p. 780, Descr. Catal., p. 851. This name U. bullata Raf. is pre- 
occupied by Unio flexuosa var. bullata Raf. Monogr. (1820), p. 307, 
No. 33, var. 1. 
Quadrula nodulata Raf. 
Obliquaria nodulata (Unio nodulata) Raf. Monogr. (1820), p. 307, No. 34, 
PIO Sih figs! 175, 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 pustulata Lea (1834) of Simps. Synops., p. 781, 
Descr. Catal., p. 856. 
Quadrula flava Raf. 
Obliquaria flava (U. flava) Raf. Monogr. (1820), p. 305, No. 28, Pl. 81, 
figs. 13, 14. 
The type is A. N. 8. P. Coll. No. 20,230, from small creeks in 
Kentucky. 
Length 46, height 36, diam. 18 mm. 
This is Quadrula rubiginosa Lea (1829) of Simps. Synops., p. 786, 
Descr. Catal., p. 872. 
Quadrula obliqua Lam. 5 
Obliquaria lateralis (U. lateralis) Raf. Monogr. (1820), p. 310, No. 43. 
The types are two valves, A. N. 8. 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 Quadrula obliqua Lam. (1819) of Simps. Synops., p. 788. 
Descr. Catal., p. 881. 
Quadrula rubra Raf. 
Obliquaria 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. 
