NATURAL SCIENCES OP PHILADELPHIA. 101 



Variety. 

 Melania viridis,* Lea, Philos. Proc. ii. p. 12, Feb. 1841. Philos. Trans., 

 viii.p. 172, t. 5,f. 19. Obs. ii. p. 12. DeKay, Moll. N. Y., p. 95. 

 Wheatley, Cat. Shells U. S., p. 27. Binney, Check List, No. 292. Cat- 

 low, Conch. Nomenc. p. 189. 



13. A. s u b g 1 o b o s a, Say. 

 Melania subglobosa, Say, Jpurn. Acad. Nat. Sci. v. p. 128, Sept. 1825. Bin- 

 ney's edit. p. 116. Binney, Check List, No. 254. Catlow, Conch. No- 

 menc. p. 188. Jay, Cat. 3d Edit., p. 62. 

 Anculotus subqlobosus, Sav, Conrad, New Fresh-Water Shells, p. 60, t. 8, f. 



14. DeKay, Moll. N. Y., p. 103. Reeve, Monog. Anculotus, t. 1, f. 10. 

 Jay, Cat. 4th Edit., p. 276. 



Anculosa subglobosa, Say, Wheatley, Cat. Shells U. S., p. 28. 



Leptoxis subglobosa, Say, Haldeman, Monog. p. 3, t. 2, f. 4058. Chenu, 



Manuel de Conchyl. i. f. 204042. Binney, Check List, No. 387. Brot, 



List, p. 25. 

 Melania subglobosa, Lea, Troo;t, Cat. Shells Tenn., p. 42. 

 Anculosa gibbosa, Philos. Proc. ii. p. 34, Apr. 1841. Philos. Trans, ix. p. 



15. Obs. iv. p. 15. Wheatley, Cat. Shells U. S., p. 28. 

 Anculotus gibbosus, Lea, Reeve, Monog. Anculotus, t. 1, f. 3. 

 Leptoxis gibbosa, Lea, Binney, Check List, No. 361. Brot, List, p. 25. 

 Melania globula,f Lea, Philos. Proc. ii. p. 12, Feb. 1841. Philos. Trans. 



viii. p. 174, t. 5, f. 22. Obs. iii. p. 12. DeKay, Moll. N Y., p. 95. 

 Troost, Cat. Shells, Tennessee. Wheatley, Cat. Shells U. S., p. 25. 

 Binney, Check List, No. 126. Catlow, Conch. Nomenc. p. 187. 



Variety. 



Anculosa tintinnabulumt, Lea, Philos. Proc. iv. p. 167, Aug. 1845. Philos. 



Trans, x. p. 67, t. 9, f. 51. Obs. iv. p. 67. 

 Anculotus tintinn abulia n, Lea, Reeve, Monog. Anculotus, t. 2, f. 13. a, b. ? 

 Melania virgata, Lea, Philos. Proc. ii. p. 13, Feb. 1841. Philos. Trans. 



viii. p. 175, t. 5, f. 25. Obs. iii. p. . DeKay, Moll. N. Y., p. 95. 



Troost, Cat. Shells Tenn. Binney, Check List, No. 290. Catlow, 



Conch. Nomenc. p. 189. Wheatley, Cat. Shells U. S., p. 27. 



14. A. p r a e r o s a, Say. 



Melania prcerosa, Say, Jour. Acad. Nat. Sci. ii. p. 177, Jan. 1824. Binney's 



E'lit., p. 70. Catlow, Conch. Nomenc. p. 188. Sowerby, Conch. Man. 



f. 314. 

 Anculotus prarosus, Say, Conrad, New Fresh- Water Shells, p. 59, t. 8, f. 13. 



Jay, Cat. 4th Edit., p. 276. Reeve, Monog. Anculotus, t. 2, f. 15, 16. 

 Anculotus prcemorsa, Say, Woodward, Manuel, t. S, f. 28. 

 Anculosa prcerosa, Say, Ravenel, Cat. p. 11. Wheatley, Cat. Shells U. S., 



p 28. Anthony, List, 1st and 2nd Edits. Kirtland, Rep. Zool. Ohio, 



p. 174. DeKay, Moll. N. Y., p. 103. 



* In treating viridis as a synonym of trilineala, I agree with the opinions expressed by Messrs. 

 Haldeman, Brot, Biuney and Anthony. The two former gentlemen, together with Dr. Jay, con- 

 sider costntus, Anthony, and occidentalis. Lea, as synonyms also. In this opinion I cannot coin- 

 cide. The two species appear to me to be well separate 1 by the costse of Mr. Anthony's species, 

 and the uniformly smooth surface of trilin-eatus. Mr. Reeve's figure of trilineatus is very poor ; 

 the bands are so represented as to appear like ribs. 



It is by no means certain that trilineata is ai Anculosa. Its general appearance suggests affini- 

 ties with the Amnicolidm, to which family several small species, hitherto considered to be Ancu- 

 losa; have been recently removed. It differs from all the Amnicolse, however, in its colored bands. 



Mr. Lea's M. viridis is tbe Var. B. of Mr. Say's description of trilineata. 



f Juvenile shell. 



% Distinguished by possessing three brown bands or rows of maculations. It is a beautiful 

 variety. 



\ \ oung shell of var. tintinnabulum. \ 



1864] 



