[" xxiv. 3 



M. fraterna, Say. St. Peter's Expedition, ii., 



p. 257, t. 15, f. 3, 1824. 

 Binney, Bost. Jour., iii., p. 363, t. 10, f. 2, 



Jan., 1840. 

 H. convexa, Deshays. Lamarck, Anim. s. Vert., 



viii., p. 112, 1838. No. 1. 



Eig. 21. S. STENOTREMA, Ferussac. PfeiiFer, Symb. ad. 

 Hist. Hel., ii., p. 39, 1842. 

 W. G. Binney, 1. c: iv., p. 61, 1859. 

 Bland, 1. c. vii., p. 427, Dec, 1861. 

 JI. hirsuta, var. Binney. Terr. Moll., ii., p. 161, 



t. 42, f. 5, 1851. No. 2. 



" 22, 23. S. GERMANA, Gould. Binney's Terr. Mol- 

 lusks, ii., p. 156, t. 40a., f. 3. 1851. 



Gould, Moll. Wilkes' Expl. Exped., p. 70, f. 

 40, a. b. c, 1852. 



W. G. Binney, 1. c. iv., p. 14, 1859. No. 5. 



" 24, S. HIRSUTA, Say. Jour. Acad. Nat. Sci., i., p. 



17, June, 1817. 

 Say, Jour. Acad. Nat. Sci., ii. p. 161, Jan., 



1821. 

 Binney, Bost. Jour. Nat. Hist., iii., p. 365, 



t. 10, f. 3, July, 1840. 

 Binney, Terr. Moll., ii., p. 150, t. 42, f. 3, 



1851. 

 W. G. Binney, 1. c. iv., p. 62, 1859. 

 Bland, 1. c. vii., p. 427, Dec, 1861. No. 3. 



" 25. S. LABROSA, Bland. Ann. N. Y. Lye Nat. 



Hist., vii., t. 4, f. 19. No. 9. 



" 26, 28, 29. S. SPINOSA, Lea. Trans. Am. Philos. 

 Soc, iv., p. 104, t. 15, f. 35, 1834. 

 Binney, Terr. Moll., ii., p. 154, t. 44, f. 1, 1851. 

 W. G. Binney, 1. c iv., p. 65, 1859. 

 Bland, 1. c vii. No. 6. 



*' 27. S. Edgariana, Lea. Proc Am. Philos. Soc, 

 ii., p. 31, Apr., 1841. 

 Lea, Trans. Am. Philos. Soc, ix., p. 2. 1844. 

 W. G. Binney, 1. c iv., p. 65, 1859. 

 Bland, 1. c vii., pi. 4, f. 18. 

 H. spinosa, var., Binney. Terr. Moll., ii., p. 155, 



t. 44, f. 2, 1851. No. 7. 



