ANCULOSA. 405 



to me by Dr. Troost. It seems to be mature, and is remarkable for 

 the two broad bands which nearly cover the whorls. The aperture 

 is about half the length of the shell. — Lea. 



Mr. Reeve's figure of subglobosa represents a shell very 

 closely approaching the variety tintinnahulum, while his fig- 

 ures of tintinnabuluvi represent respcctivel}^, fig. 13a, variety 

 (jibbosa, banded; fig. 13ti, probably a young Leptoxis crassus 

 of Haldeman. 



Professor Haldeman was the first naturalist who detected 

 the specific identity of the shells I have grouped together 

 above, and other gentlemen have since adopted his opinion 

 regarding them. 



13. A., preerosa, Say. 



Melanin preerosa, Say, Jour. Acad. Nat. Sci., ii, p. 177, Jan., 1824. Binney's edit. 



p. 70. Catlow, Conch. Nomenc, p. 188. Sowerby, Conch. Man., f. 3U. 

 Anculotus prcerostis. Say, CON'RAD, New Fresh- Water Shells, p. 59, t. 8, f. 13. Jay, 



Cat., 4th edit., p. 276. Eeeve, Monog. Anculotiis, t. 2 f. 15, 16. 

 Anculotus pramorsa, Say, \Voodwakd, Manuel, t. 8, f. 28. 

 Anculosa preerosa, Say, Ravexel, Cat., p. 11. Wheatley, Cat. Shells U. S., p. 28. 



Anthony, List, 1st and 2d edits. Kirtland, Rep. Zool. Ohio, p. 171. DeKay, 



Moll. X. Y.. p.l03. 

 Leptoxis preerosa. Say, Haldeman, Monog. Lept., p. 2, 1. 1, f. 1-18. Chenu, Man- 

 uel, i, f. 2030-31. BiNNEY, Check List, No. 380. Brot, List, p. 25. Adams, 



Genera, i, p. .';07. Morch, Yoldi, Cat., p. 5G. 

 Melania angulosa, Mexke, Syn. Meth., 1st edit., p. 81, 1828. 2d edit., p. 135, 1830. 



BiNXEY, Check List, No. 15. 

 Melanin cruentata, Menke, Syn. Meth., 1st edit., p. 80, 1828. 2d edit., p. 1.34, 1830. 

 Melanin ovuhiris, Mexke, Syn. Meth., 1st edit., p. 80. 2d edit., p. 134. Binney, 



Check List, No. l'.)4. 

 Metanopsis neritifvrmis, Deshayes, Encyc. Meth. Vers., ii, p. 438, No. 14. Anim. 



Sans Vcrt., 2d edit., viii, p. 4:»2, 1838. 

 Lithasia veritiformis, Deshayes, Ada.ms, Genera, i, p. 308. 

 Anculotus auf/ulatus, CosRAD, New Fresh-Water Shells, p. 60, t. 8, f. 15, 1834. 



DeKay, Moll. N. Y., p. 102. Wheatley. Cat. Shells LT. S., p. 27. Reeve, 



Monog. Anculotus, t. 6, f. 51. Jay, Cat. Shells, 4tli edit., p. 276. MUller, 



Synopsis, p. 40, 1S3G. 

 Leptoxis angulata, Courad, BixxEY', Check List, No. 340. Adams, Genera, i, 



p. 307. 

 Melanin Cincinnatiensis, Lea, Philos. Proc, i, p. 66, Dec, 18,'58. Philos. Trans., 



viii, p. i;iO. t. G, 1" .W. Obs., iii, p. 28. Jay, Cat., 4th edit., p. 273. Catlow, 



Conch. Nomenc. p. 186. 

 Anculotus Cincinnatiensis, Lea, DeKay, Moll. N. Y., p. 95. Troost, Cat. Shells 



Tennessee. 

 Leptoxis Cincinnatiensis, Lea, Binney, Cheek List, No. 346. 



Description. — Shell subglobular, oval, horn-color; volutions three 

 or four, wrinkled across; spire very short, much eroded in the old 

 shell, so much so as to be sometimes not prominent above the body- 



