HELIX. 



91 



the light margin having a broad hooked lamella, and the base Fig. 162. 

 an erect lamelliform tooth produced into and recurved within 

 the aperture. Greater diam. 9, lesser 8 ; height 4 mill. 



Helix espiloca, Ravenel, MS., Bland, Ann. N. Y. Lye. VII, 



115, pi. iv, f. 1, 2. 

 Doedalochila espiloca, Tkyon, Am. Journ. Conch. Ill, 156, pi. 



xi, f. 7-9 (1867). 



Sullivan's Island, South Carolina. 



In the form of the parietal process, it is intermedi- 

 ate between H. postelliana and H. avara, but most 

 like the latter ; the teeth on the peristome are very similar to those 

 in the former, but beneath it is less inflated, the umbilical region 

 is wider, showing more of the penultimate whirl, and it is hirsute. 



Fig. 163. 



Belix avara,' 

 enlarged. 



Helix avara, Sat. — Shell rimately umbilicated, depressed-convex 

 above, convex below, striated, especially near the aperture, horn-colored, 

 thin, covered with numerous short, robust hairs ; spire convex, not much 

 elevated ; whirls four, rounded, the last more convex, con- 

 stricted behind the peristome, not grooved within the 

 moderate umbilicus ; aperture very oblique, subreniform, 

 contracted ; peristome white, acute, elevated, continuous, 

 its terminations connected by an elevated, oblique angular 

 fold; the columellar margin furnished with two projecting, 

 obtuse, curved teeth, separated by a deep sinus. Greater 

 diam. 7, lesser 6 ; heights mill. 



Polygyra avara, Sat, Nich. Encycl. 3d Am. ed. (1819) ; Journ. Phila. 



Acad. I, 277 (1818) ; ed. Binnet, 11.— DeKat, N. Y. Moll. 47 (1843). 

 Helix avara, Fekussac, Hist. pi. 1, f. 2. — Pfeiffer, var. S. minor, Mon. 



Hel. Viv. I, 418 (ex parte). — Deshayes in Fer. Hist. II, 78, pi. 1, 



f. 2. — Chemnitz, ed. II, 370 (ex parte), excl. fig. — Reeve, Con. Icon. 



(ex parte), no. 720, excl. fig.— Bland, Ann. N. Y. Lye. VII, 30, fig. 



(1858).- W. G. BiNNEY, Terr. Moll. IV, 74. 

 Dadalochila avara, Tkyon, Am. Journ. Conch. Ill, 155, pi. xi, f. 4-6 (1867). 



St. John's River, Florida. 



H. avara, Say, may be readily distinguished by its smaller 

 size, more delicate texture, and less globose form — it has from 

 four to four and a half whirls, and is the only species of the group 

 which is hirsute, except H. espiloca. The superior tooth on the 



' The strim in Fig. 163 are incorrectly represented: they should have 

 been shown only at the termination of the last whirl, over a small space 

 immediately behind the peristome. 



