G50 ERRATA. 



Page 371. For the foreign species in the Proc. Phila. Acad., see p. 551. 



" 372, line 26, for November, 1842, read December, 1642. 



" 372, line 21, for March, 1853, read March, 1843. 



" 373. For Leidy's paper first quoted, see also Fror. Not. 3 Reibe, Bd. 



4, No. 68, 1847, p. 24, and Journ. de Conch, i, 1850, p. 34. 

 Page 374, line 32,/or 58 read 57. 



" 386. For foreign species in Phila. Proc, see p. 556. 



" 404, line 2, add see also p. 560. 



" 404, line last, add see also p. 327. 



" 405, line 2, add see also p. 520. 



" 417, line 8, add see also p. 504. 



" 422, line 2, add see also p. 525. 



" 427, line 4, add see also p. 631. 



" 427, line A, for 1856 read 1846. 



" 427. Cooper's paper should not have been quoted here, its date 



being 1860. 

 Page 427, line 26, add Banks of the Ohio. 



" 429, line 7, for 1841 read 1851. 



" 433, line 6, add see also p. 547. 



" 436, line 12 from bottom, see also Faunus von Gistl. Bd. i, Hft. 1, 



1837, p. 42. 

 Page 451, line 8. The title in the Transactions is " Descriptions of new 



species of the family Unionidre." 

 Page 477, line 26, for Crypogenia read Cyprogenia. 



" 486, line 13 from bottom, add see p. 64. 



" 490, line 4, add Adams. 



" 499, line 24,/or 100 read 101. 



" 500, line 21, for 187 read 189. 



" 501, line 13. The quotations from p. 215 to 233 on the next page 



are by Bland. 

 Page 502, line 11 from bottom. The quotations from p. 233 are to be attri- 

 buted to Adams. 

 Page 502, line 3 from bottom. The quotations are by Bland. 



" 503. The first title is by Adams. 



" 525, line 2, add see also p. 422. 



" 526, line 2, add see also p. 343. 



" 530, line 2, add see also p. 357. 



" 531, lines 6, 7, 8, for 160 read 161 ; their date is also May, 1844. 



" 550, line 14 from bottom, after Vol. ii, add Part 2. 



" 551, line 10 from bottom, add see also p. 371. 



" 552, line 16, add see also Proc. vi, 435. Nov. 1853. 



" 552, line 26, add see also p. 606 of Bibliography. 



" 556, line 3 from bottom, add see also p. 386. 



" 565, before line 13 from bottom, add No. ix, May, 1851. 



" 581. Redfield's paper, add June, 1852. 



" 583, before page 297, add July, 1852. 



