32 



LAND AND FRESH-WATER SHELLS OF N. A. 



PART III. 



Fig. 59. Paludina haleiana, Lea — Shell smooth, ventricosely conical, 



rather thin, reddish horn-color, imperforate ; sp're short ; su- 

 tures much impressed ; whirls four, nearly convex ; aperture 

 large, nearly round, bluish. 



Diameter .4, length .55 inch. Alexandria, La. 

 This species is nearly allied to the Pal. troostiana, nob., 

 but is rather smaller, of a darker color, not quite so rotund, 

 and imperforate. These differences would distinguish it 

 without difficulty. In the haleiana there is a disposition in most of the 

 specimens to a compression below the sutures. This makes quite a shoulder 

 at the sutures and prevents the mouth from being regular. (^Lea.) 



Paludina 

 haleiana. 



Fig. 60. 



Vivipara coosa- 

 ensis. 



Vivipara COOsaensis, Lea — Shell subglobose, thin, pale, rather 

 smooth, perforate ; spire short ; sutures very much impressed ; whirls five, 

 round ; aperture large, nearly round, within whitish. 



Coosa River, Alabama. Dr. Brumby. My cabinet, and 

 cabinets of Dr. Griffith and Dr. Foreman. Diaiu. .58, 

 length .62 inch. 



This species is remarkable for its round whirls, its width 

 and large deep sutures. The superior part of the whirls 

 is somewhat flattened. The color is remarkably pale, 

 nearly white. Tlie epidermis is very thin, and under the 

 lens displays very minute, rather regular longitudinal 

 striffi crossed on the body whirl by obsolete stris. The aperture is nearly 

 one-half the length of the shell. {Lea.) 



Paludina coosaensis, Lea, Tr. Am. Phil. Soc, IX, p. 23 (1844). Obs. IV, 



23. Proc, II, 83 (1841).— Reeve, Con. Icon. (Feb. 1863). 

 Paludina magnljica, pars., Haldeman, Mon., pt. 6, p. 4 of wrapper. 



Mr. Lea's type of this species bears but little resemblance 

 to V. magnifica, yet Prof. Haldeman unites the two. I myself 

 have seen no connecting links between them, though I have ex- 

 amined numerous young individuals of Viv. inagnifica. 



Fig. GO is drawn from the original specimen of Mr. Lea. No. 

 8949 of the Smithsonian collection was labelled by Mr. Lea. 



