366 A MANUAL OF AMERICAN LAND SHELLS. 



Polygyra espiloca, Ravenel, 



Shell rimately perforate, above slightly convex, beneath convex, stri- 

 FiG. 398. ated, reddish horu-color, thin, with very short hairs; spire 

 scarcely elevated ; whorls 5, rather convex, the last deflected 

 and turned outwards from the preceding one, scrobiculate, con- 

 stricted, grooved within the umbilical region; aperture very 

 oblique, subreniform. contracted ; peristome acute, continuous, 

 the margins joined by a lamella, excavated above, and pro- 

 p.emioca. duced into a tongue-shaped tooth, the right margin having a 

 broad, liooked lamella, and the base an erect lamelliform tooth i)roduced 

 into and recurved within the aperture. Greater diameter 9, lesser 8"""; 

 height, 4™"'. 



Helix espiloca, Ravenel, MS., Bland, Ann. N. Y. Lye, vii, 115, pi. iv, figs. 1, 2. — W. 



fi. BiNNEY, L. & Fr.-W. Sh., ii, 91 (1869). 

 DcvdaJochila espiloca, Tryon, Am. Jouni. Concli., iii, 156 (1867). 

 Polijiiyra espiloca, W. G. BiNNEY, Terr. Moll., v, 267. 



Sullivan's Island, South Carolina; Saint Simon's Island, Georgia; 

 New Orleans; Indianola, Tex. It seems, therefore, to range over the 

 Southern liCgion. 



In the form of the parietal process it is intermediate between F. Pos- 

 telliana and P. avara, but most like the latter; the teeth on the peri- 

 stome are very similar to those in the former, but beneath it is less in- 

 flated, the umbilical region is wider, showing more of the penultimate 

 whoil, and it is hirsute. 



Jaw as usual in the genus ; 10 ribs. 



Lingual membrane (Terr. jMoIL, V, Plate YI, Fig. V) with 25-1-25 

 teeth, with 11 laterals. The inner cutting point of the marginals is 

 simple, not bifid. 



Genitalia not observed. 



Polygyra avara, Say. 

 Shell rimately umbilicated, depressed convex above, convex below, 

 striated, especially near the aperture, horn-colored, thin, covered with 

 Fig. 399.* numerous short, robust hairs; spire convex, not much ele- 

 vated ; whorls 4, rounded, the last more convex, constricted 

 behind the peristome, not grooved within the moderate um- 

 bilicus; aperture very oblique, subreniform, contracted; per- 

 istome white, acute, elevated," continuous, its terminations 



"The siriw in this figure are incorrectly re])reseute(l ; they should have been shown 

 ouly at the termiiiatiou of the last whorl, over a small space immediately behind the 

 peristome. The figure does not show the hirsute character of the shell. 



