28 



LAND AND FRESII-WATER SHELLS OF N. A. PART IIL 



Fig. 52. 



Paludlna (jcorgiana, Lea, Tr. Am. PliiL Soc. V, 11 G, pi. xix, fig. 85, 

 date of title 1837 ; Obs. I, p. 228.— Haldeman, Mon. p. 23, pi. vii, 

 f. 1, 2 (1841).— KiJSTER, in Chemn. ed. 2, p. 15, pL iii, f. 7, 8 (1852) 

 —DeKay, N. Y. MoU. p. 86 (1843).— Chejjit, Man. Conch. I, 310, 

 fig. 2207 (Melantho); Illust. Coucb. pi. i, f. 20, 21. — Philippi, Concb. 

 iii, 4, pL i, f. 13 (1848). 



Paludina warenna, Sucttlewoktu in Kijster, Cbemn. ed. 2, 21, pi. iv, f. 

 10-11. — Reeve, Con. Icon. 23 (18G3). 



Vivipara vivipara (part), W. G. Bix.vey, proof-sbeets of this work. 



Inhabits Florida, Georgia, South Carolina, and Alabama. 

 Mr. Lea's description of this species will have to be considerably 

 modified to cover the various forms now known 

 to exist ; it was drawn from a specimen Avhich 

 was uniformly dark, horn-colored. Speci- 

 mens in the Smithsonian collection are -thus 

 characterized, while others are of an uniform 

 pale greenish horn-color; others (Fig. 53) 

 have a dark-green or brownish ground, varied 

 with four broad brownish bands revolving on 

 the body whirl, two only of which are dis- 

 cernible on the penultimate whirl ; in others 

 these bands arc replaced by numerous revolv- 

 ing, unequal brown lines (Fig. 54). Those having the revolving 

 lines have also bands which, as in the other cases, are plainly visible 

 in the aperture of the shell. The bands do not reach the edge 

 of the peritreme in the aperture ; they are still discernible when 

 the shell has lost its epidermis. As the peritreme rises to meet the 

 base of the body whirl it is expanded and reflected, sometimes leav- 

 ing a chink forming a false umbilicus — the shell being imperforate. 

 I have not been able to 

 trace any revolving micro- 

 scopic lines upon the speci- 

 mens I have examined. 



No. 8854 of the collection 

 was determined by Mr. Lea. 

 His description is given 

 below, and an outline of his 

 original figure. Fig. 52 is 

 copied from naldenuin's fig- 

 ure, which Avas drawn from llie original speci- 

 men. The other figures are from specimens in the collection. 



Paludina georgiana. 



Fig. 53. 



Fig. 54. 



Vivipara georgiana. 



Vivipara georgiana. 



