.18 



LAND AND FRESU-WATER SHELLS OF N. A. 



PART IlL 



Paludinu intertexta, Say, 1829, New Harmony Diss. II, 244 ; Am. Concli. 

 3, pi. XXX, f. 3, 4, 1831 ; Binney's ed. p. 14(5, 185, pi. xxx, f. 3, 4 ; 

 ed. Chexu, 42, pi. xi, f. 7 — 9. — Haldeman, Mon. p. 31, pi. x, i. 1 — 6, 

 1841.— DeKay, N. Y. Moll. p. 85 (1843).— Philippi, Conch. II, 8, 

 pi. ii, f. 4 (1846).— KtJSTEK, in Cliemn. ed. 2, p. 16, pi. ill, f. 9, lU* 

 (1852). 



Paludina transxtersa, Say, N. H. Diss. II, 245, 1S29 ; Binkey's ed. p. 145. 

 — DeKay, N. Y. Moll. p. 85 (1843). 



Ampullaria (?) intertexta, Haldeman, Mon. Ampnllaria, p. 11 (1844?). 



Fig. 27. 



Ill addition to Mr. Say's localities, I have received it from 

 Grand Coteau, St. Laundry Parish, La, 

 (Blanc.) Also from South Carolina (Ba- 

 venel), and from Davenport, Iowa {Prof. 

 Sheldon). Very globose specimens of Vi- 

 vipara contectoides sometimes are readily 

 confounded at first glance with this species. 

 They are umbilicated. 



Mr. Say's figures are copied above (fig. 

 26). Fig. 27 represents the front view of a 

 more perfect specimen. No. 88G3 of the 

 collection. 



Mr. Say's type of Pal. transversa is still preserved in the 

 Cabinet of the Philadelphia Academy. It is evidently a young 

 intertexta, as suggested by Haldeman. His description follows, 

 with a view of his type (Fig. 28). 



Vivipara intertexta. 



Fig. 28. 



Paludina transversa, Say. — Shell transverse, depressed, orbicnlar ; spire 

 convex ; whirls three and a half, with numerous minute, slightly elevated 

 revolving lines ; suture not widely indented ; body whirl very 

 convex, short ; umbilicus small ; operculum pale fulvous. 

 Greatest width, two-fifths of an inch. Inhabits Louisiana. 

 We obtained two specimens in the marshes near New Orleans. 

 Paludina ^* ^^ much wider in proportion to the length than any other 

 transversa, species I have seen, exceeding in this respect even M. suhijlohosa, 

 nob., and especially P. intertexta, nob., of which latter, in fact, 

 I at first supposed it to be the young, in consequence of its rotundity and 

 the similarity of its capillary lines; but inasmuch as the number of its 

 whirls is nearly the same, whilst the magnitude differs so greatly, I have 

 separated it as a different species. (^Say.) 



