n 



308 PROCEEDINGS OP THE ACADEMY OF 



4 I. b re vis, Anthony. 



Io brevis, Anthony, Proc. Acad. Nat. Sci., Feb. 1860, p. 69. Binney, Check 



List, No. 399. Reeve, Monog. Io, t. 1. f. 4. 

 Io Spirostoma, Anthony, Proc. Acad. Nat. Sci., Feb. 1860, p. 70. Binney, 



Check List, No. 403. Reeve, Monog. Io, t. 1, f. 1. 



5. I. turrit a, Anthony. 

 Io turrita, Anthony, Proc. Acad. Nat. Sci., Feb. 1860, p. 69. Binney, Check 

 List, No. 405. Reeve, Monog. Io, t. 3, f. 19. 



Spurious Species. 

 To nodosa, robusta, variabilis, Spillmanii, modesta, viridula, gracilis, nobilis, 

 of Lea. 

 These are species of Pleurocera. 



Subgenus PLEUROCERA, Rafinesque. 



Pleurocera, Rafinesque, Jour, de Phvs. Bruxelles, tome 88, p. 423, 1819. 



Blainville, Diet. Sc. Nat., xxxii. p. 236, 1824, xli. p. 376, 1826, Man. 



Malacologie, p. 441, 1825. Rang, Man. Conchyl. p. 374, 1829. Menke, 



Syn. Method, Edit. 2, p. 43, 1830. Ferussac, Bull. Zool., p. 93, 1835. 



Sowerby, Conch. Man. Edit. 2, p. 231, 1842. Hermannson, Indicis 



Gen. Malacoz., i. p. 296. 1846. Haldeman, Iconog. Encyc, p. 84. 

 Ceriphasia, Svvainson, Malacol., p. 204, 342, 1840. Gray, Syn. Brit. Mus., 



1844. Hermannson, Indie. Gen. Mai., i. p. 208, 1846. Gray, Zool. 



Proc. pt. 15, p. 153, 1847. H. and A. Adams, Genera, Recent, Moll. i. 



p. 297, 1854. Chenu, Manuel de Conchyl. i. p. 288, 1859. 

 Telescopella, Gray, Proc. Zool. Soc, pt. 15, p. 153, 1847. 

 Elimia, (part) H. and A. Adams, Genera, i. p. 300, 1854. Chenu, Man. de 



Conchyl .i. p. 290, 1859. 

 Megara, (part) H. and A. Adams, Genera, i. p. 306, 1854. Chenu, Man. de 



' Conchyl. i. p. 293, 1859. 

 Trypanosoma, Lea, Proc. Acad. Nat. Sci., p. 169, April 1862. Jour. Acad. 



Nat. Sci., 2d ser. v. pt. 3, p. 268, March, 1863. Obs., ix. p. 90, March, 



1863. 

 Melania, (sp.) of authors. Binney, Check List. Reeve, Monog. Mel., Nov., 



1859, to June, 1861. Brot, Cat. Syst., p. 30, 1862. 



SPECIES. 



A. Tuberculate. 

 1. P. alveare, Conrad. 



Melania alveare, Conrad, New Fresh Water Shells, p. 54, t. 4, f. 7, 1834. 

 DeKay, Moll. N. Y., p. 94. Wheatley, Cat. Shells U. S., p. 24. Jay, 

 Cat. 4th Edit., p. 272. Binney, Check List, No. 11. Brot, List, p. 30. 

 Hanley, Conch. Misc., t. 8, f. 74. 



Megara alveare, Conrad, Chenu, Manual, i. f. 2022. 



Melania torqnata, Lea, Philos. Proc, ii. p. 242, Dec, 1842. Philos. Trans, 

 ix. p. 27. Obs., iv. p. 27. Wheatley, Cat. Shells U. S., p. 27. Bin- 

 ney, Check List, No. 271. 



Melania pemodosa, Lea, Philos. Proc. iv. p. 105, Aug., 1845. Philos. Trans. 

 x. p. 66, t. 9, f. 49. Obs., iv. p. 66, t. 9, f. 49. Binney, Check List, 

 No. 202. 



Melania nupera, Say, (young) American Conchol. pt. 1, t. 8, middle figure. 



Melania producta* Lea, Philos. Proc, ii. p. 243, Dec, 1842. Philos. Trans., 

 ix. p. 28. Obs., iv. p. 28. Wheatley, Cat. Shells, U. S., p. 26. Bin- 

 ney, Check List, No. 217. Brot, List, p. 36. 



Melania grossa,* Anthony, Proc Acad. Nat. Sci., p. 59, Feb., 1860. Brot, 

 List, p. 40. Reeve, Monog. f. 411. 



* M. productum and grossa are the young of a large variety of alvtare. 



[Nov. 



