MELANTHO. 289 



Genus ]^IEL.4NTHO, BowDircn. 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 Lst 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. 



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



Paludina decisa, Say, 1817, Nich Encycl. pi. 3, fig. G (Limmea of earlier editions) ; Amcr. 

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

 le, pi. 2, fig. 5. — Philippi, Conch, iii. 3, pi. 1, fig. 8 ( 1848). — Haldemax, Mon. 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 Chcmn. 2d ed. 13, pi. 2, figs. 14 - 19. — Reeve, Con. Icon. 45, 

 a, c, d, excl. 45 & (P. ponderosa) , Mar. 1863. 



Melanin ontlaris, Menke, Syn. Meth. 134, teste KiisTER. 



Paludina liiiiosa, Valenciennes, Ilec. d'Ohs. ii. 253, 1833, teste KiJSTER and IIalde- 



MAN. 



Paludina ponderosa, jnn., Desiiayes in Lam. viii. 516 (1838) ; cd. 3, iii. 455. 



Paludina heterostropha, Kirtl.\nd, Ohio Kcp. 175 (1838). — Tappan, Am. Journ. Sc. [i.] 



xx.w. 269, pi. 3, fig. 2, 1839. 

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

 Paludina rufa, Halde.man, Mon. iii. p. 3 of wrapper, pi. 3, fig 1 (1841), 15. 

 Paludina cornea, Valenciennes? Rec. d'Obs. ii. 255, 1833. 

 Paludina integra, Say, 1821 ; Binney's ed 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, Chcmn. 2d ed. 17, t. 3, 



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



1, fig. 7 (1848). 

 Paludina f/rnicula, CoNRAD, N. Fr. W. Shells, 48, pi. 8, fij. 3, 1834 ; ed. Chenu, 23, pi. 



4, fij?. 20. — Kuster in Chemn. 2d ed. 14, pi. 3, figs. 5, 6 (18.-i2). — Muller, Syn. 



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



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

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

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



pi. 11, fig. 75 (1863). 

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



Helix dissiniilis, Wood, Ind. Suppl. pi. 7, fig. 18 (1828) ; Hanley's cd. 226 (1856). 

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

 Lymntda venlricosa, Rafinesque, MSS. 

 Ambloxis [Anihlostoma) major, Rafinesque, MSS. 

 19 



