MELANTHO. 289 



Genus ITIELAWTHO, Bowditch. 1822. 



Shell thick, solid, ovate, imperforate, spire produced ; whorls 

 rounded, smooth, covered with an olivaceous epidermis ; peristome 

 simple, continuous. 



Melantho decisa. 



Figure (see woodcut, p. 144 of 1st cd.). 



Shell sub-conic, thick and strong, olivaceous; whorls five, convex, covered 

 with minute, revolving lines, eroded at tip ; aperture ovate, half the length of 

 the shell, bluish within ; umbilicus none. 



LImncca decisa, Say, Nich. Encycl. ed. 1, 1817 ; 2d ed. 1818, pi. 3, fig. 6. 



Paludina decisa, Say, 1817, Nich Encycl. pi. 3, fig. 6 (Limncea of earlier editions) ; Amer. 

 Conch, i. pi. 10 (1830) ; ed. Binney, 49, 159, pi. 10, fig. 1 ; pi. 70, fig. 6 ; ed. Ciienu, 

 16, pi. 2, fig. 5. — Philippi, Conch, ill. 3, pi. 1, fig. 8 (1848). — Haldemax, Men. 4, 

 pi. 1 (1840). — Gould, Inv. of Mass. 1st ed. 227, woodcut, p. 144 (1841 ). —Adams, 

 in Thompson's Hist, of Vermont, 151, fig. (1842). — De Kay, N. Y. Moll. 84, pi. 6, 

 fig. 131 ; pi. 7, 134 (1843).— Chenu, 111. Conch, i. figs. 1-5. —Mrs. Gray, Fig. 

 Moll. An. pi. 310, fig. 10. — Potiez et Michaud, Gall, des Moll. i. 247, pi. 25, figs. 

 13, 14. — KusTER in Chemn. 2d ed. 13, pi. 2, figs. 14 - 19. — Reeve, Con. Icon. 45, 

 a, c, d, excl. 45 6 (P. pouderosa), ISIar. 1863. 



Melania ovularis, Menke, Syn. Meth. 134, teste Kijster. 



Paludina liinosa, Valenciennes, Rec. d'Obs. ii. 253, 1833, teste KiJSTER and Halde- 



MAN. 



Paludina ponderosa, jun., Desiiayes in Lam. viii. olG (1838) ; ed. 3, iii. 455. 



Paludina Jieterostropha, Kirtland, Ohio Rep. 175 (1838). — Tappan, Am. Journ. Sa [i.] 



XXXV. 269, pi. 3, fig. 2, 1839. 

 Paludina microstoma, Kirtland, Ohio Rep. 175 (1838). 

 Paludina rnfa, Haldeman, Mon. iii. p. 3 of wrapper, pi. 3, fig 1 (1841), 15. 

 Paludina cornea, Valenciennes'? Rec. d'Obs. ii. 255, 18-33. 

 Paludina integra, Say, 1821 ; Binney's cd 69 ; Journ A. N Sc. ii. 174 (1821). — Hal- 



deman, Mon. 10, pi. 3 (1840). — Adams, in Thompson's Vermont, 152 (1842). — 



De Kay, N. Y. Moll. 84, pi. 7, fig. 132 (1843). — Kuster, Chemn. 2d ed. 17, t. 3, 



figs 11 -13. — Chenu, 111. Conch, pi. 1, figs. 9-13. — Philippi, Conch, iii. 4, pi. 



1, fig. 7(1848). 

 Paludina genicula, Conrad, N Fr. "W. Shells, 48, pi. 8, fig. 3, 1834 ; ed. Chenu, 23, pi. 



4, fig. 20. — Kuster in Chemn. 2d ed. 14, pi. 3, figs. 5, 6 (1852). — MOller, Syn. 



Test, in 1834 prom. p. 39. — Haldeman, Mon. 15, pi. 5 (1840). — De Kay, N. Y. 



Moll. 86 (1843). — Chenu, lilust. Conch, pi. I, figs. 18, 19. 

 Paludina heros, De Kay, olim, X. Y. Prel. Rep. 1839, p. 32 ; Moll. 85 (1843). 

 Paludina decapitata, Anthony, Proc. A. N. S. Phila. 1860, p. 71. — Reeve, Con. Icon. 



pi. 11, fig. 75 (18fi3). 

 Paludina milesii, Lea, Proc Phila. Acad. Nat. Sc. 1863, 156. 



Helix dissimilis. Wood, Ind. Snppl. pi. 7, fig. 18 (1828) ; Hanley'S ed. 226 (1856). 

 Helix decisa, Eaton, Zool. Text-Book, 196 (1826). 

 Lymnula ventricosa, Rafinesque, MSS. 

 Ambloxis (Amblostoma) major, Rafinesque, MSS. 

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