80 



LAND AND FRESH-WATER SHELLS OF N. A. [pART IV. 



Fig. 149. Fig. 150. 



eight, flattened; aperture rather small, rhomboidal, within whitish; 

 outer lip acute, sinuous ; columella white aud twisted. 



Operculum ovate, dark brown, with the polar 

 point near the basal margin. 



Hahitat. — French-broad and Tellico Creeks, 

 Tennessee ; J. Clark and Prof. Christy : Florence, 

 Alabama; Rev. G. "White: Noxubee River, Mis- 

 sissippi; Dr. Spillman : Clinch River, Tennessee; 

 Dr. "Warder: and Coosa, Cahawba and Alabama 

 Rivers, Alabama; Dr. Showalter. 

 Diameter, -40; length, 1-13 inches. 

 Observations. — This species has the color of Spillmajui, herein 

 described, but it is a smaller and thicker species, and has a distinct 

 carina. It is also less attenuate. The specimen fi"om Clinch River is 

 pale horn-color. Those from Tellico Creek are nearly all furnished 

 with 2-4 bands. Two or three from Fronch-broad are of a deep 

 purple. The aperture is about one-third the length of the shell. 



I have great pleasure in naming this after my deceased friend, 

 Joseph Clark, to whom I am indebted for many species brought by 

 Prof. Christy.— iea. 



I doubt whether this species is really distinct from P. canal- 

 itium. It appears, however, to be rather a broader shell 

 proportionally, with a better developed carina and recurved 

 canal. Both are common species. 



24. P. Antlionyi, Lea. 



Trypanostoma Antlionyi, Lea, Proc. Acad. Nat. Sci., p. 172, 18ii2. Jour. Acad. 

 Kat. Sci., V, i)t. 3, p. 293, t. 36, f. 123. Obs., ix, p. 115. 



Description. — Shell rugosely striate, pyramidal, thick, yellowish, 

 olive; spire raised; subrugoscly impressed; whorls fj^ 151 

 about nine, flattened ; aperture rather large, rhomboidal, 

 white within; outer lip acute, sinuous; columella thick- 

 ened below and very tortuous. 



Operciilnm subovate, dark brown, with the polar point 

 near to the base on the left. 



Habitat. — Tennessee; J. G. Anthony: "Warrior River 

 and Yellow Leaf Creek, Alabama; Dr. Showalter: Fox 

 River, Indiana; J. Sampson. 



Diameter, -GO; length, 1-43 inches. 



Observations. — A number of specimens of this tine large species are 



