62 LAND AND FKESH-WATER SHELLS OF N. A. [pART IV. 



B. Sul 

 8. P. canaliculatum, Say. 



JUelania canalwulata, Say, Jour. Acad. Nat. Sci., ii, p. 175, January. 1821. Bin'XEY'S 



Reprint, p. G5. BiNNEY, Check List, No. 4,5. DeKay, Moll. N. Y., p. 94. 



Wheatley. Cat. Shells U. S., p. 24. Ravenel, Cat., p. 11. Jay, Cat , 4th edit., 



p. 273. Anthony, List, 1st and 2nd edits. Kirtland, Report Zool. Ohio, p. 



174. Catlow, Coach. Nomenc, p. 185. Bkot, List, p. 30. Eeeve, Monog. 



Mel., sp. 304. 

 Iccanaliculata, Say, IMoRCH, Yoldi Cat., p. 56. 

 Ceriphasia canaliciUata, Say, Chenu. Manuel, Conchyl. i, f. 1959. 

 Ceriphasia canalicuiata, Say, Adams, Genera, i, p. 297. 

 Melania conica. Say, Jour. Acad. Nat. Sci., ii, p. 17G, January, 1821. Binney'S 



Reprint, p. 70. Binney, Checl£ List, No. 65. Reeve, Monog. IMel., sp. 252. 



DeKay, Moll. N. T., p. 95. Ravenee, Cat., p. 11. Haldemax, Monog. 



Limniades, No. 7, p. 4 of Cover. Brot, List, p. 30. Kirtland, Rep. Zool. 



Ohio, p. 174. Anthony, List, 1st and 2nd edits. Jay, Cat., 4th edit., p. 273. 



Wheatley, Cat. Shells U. S., p. 24. Catlow, Conch. Nomenc, p. 186. 



Soaveruy, Mollusca, Fauna Boreali Americana, iii, p. 316, 1836. 

 Mel:inia substricta, Haldeman, Suppl. to Monog. of Limniades. 

 Pirena plana (Jan.), Brot, Mel., p. 60, note. , 



Strombus Sayi, Wood, Index Testaceol. Suppl., t. 4, f. 34. 

 Mdanla Sayi (Wood), SHORT and Eaton, Notices, p. 82. ANTHONY, List, 1st and 



2nd edits. 

 Melania Sayi, Ward, WHEATLEY, Cat. Shells U. S., p. 27. 

 Melania Sayi, Ward, Kirtland, Rept. Zool. Ohio, p. 174. JAY, Cat., 4th edit., p. 



274. HiGGiNS, Cat., p. 7. 

 Melania Sayi, Deshayes, Catlow, Conch. Nomenc. p. 188. 

 Melania Sayi, Deshayes, Encyc. Meth. Vers., ii, p. 427, 1830. 

 Melania exarata, Menke, Syn. Meth., p. 135, 1830. Binney, Check List, No. 100. 

 Mel inia liynta, Menke, Syn. Meth., p. 236, 1830. BiNNEV, Check List, No. 162. 

 Melania auriscilpium, Menke, Syn. Meth., p. 133, 1850. BiNNEV, Check List, No. 25. 

 Gyrotoma coiiica, Say, Adams, Genera, i, p. 305. 



Description. — Shell tapering, horn-color; volutions about seven, 

 slightly wrinkled; spire towards the apex much eroded, whitish; 

 body, with a large obtuse groove, which is obsolete upon the whorls 

 of the spire in consequence of the revolution of the suture on its infe- 

 rior margin ; this arrangement permits the superior margin of the 

 groove only, to be seen on the spire, in the form of an obtuse carina 

 on each of the volutions; aperture bluish-white within with one or 

 two obsolete revolving sanguineous lines ; labrum slightly undulated 

 by the groove and with a distinct sinus at the base of the columella. 



Habitat. — Ohio River. 



Breadth, three-fifths of an inch; length, one inch and one-tenth. 



Greatest transverse diameter more than two -fifths. Very common 

 at the Falls of the Ohio Kiver. It is probably the largest species 

 of this genus in the United States, and may be readily distinguished 

 from its congeners by its broad groove. — Saj/. 



