FAMILY HELICID4 — HELIX. A7 
H. auriculata. Potyeyra id. (Say, Ac. Sc. Vol. 1, p. 277. Pu. 3, fig. 28 in this volume.) Shell 
small, flattened above. Spire little elevated, often eroded. Whorls 5, rounded beneath, obtusely 
carinate above, regularly wrinkled across. Umbilicus small within, dilated without. Lip and 
pillar-lip irregularly dilated, and nearly closing the aperture, with a faint resemblance to an ear. 
Color, bluish white to reddish brown. Diameter, 0-4; height, 0-2. Florida. 
This forms the type of a new genus proposed by Say, under the name of Polygyra, but which 
has not been adopted by subsequent naturalists. I have deemed it important to give a figure, as there 
is none extant to which the American naturalist has convenient access, 
H. sayi. (Woop, Intex Suppl. pl. 7, 34.n.) Shell small. Lip reflected, forming a narrow sulcus 
towards the open umbilicus. Color, brownish. 
Closely allied to, if not identical with the preceding. 
H. septemvolva. Potyeyra id. (Say, Ac. Se. Vol. 1, p. 278. Ferussac, pl. 51, fig. 6.) Shell 
much depressed, discoidal. Spire not prominent. Whorls 7, perfectly lateral, compressed and 
depressed, with lines and grooves above; a projecting keel on the upper edge of the body-whorl. 
Aperture subreniform, not contracted. Outer lip reflected; pillar-lip projecting inward into an 
angle or tooth. Umbilicus moderate, attenuated to the apex, so as to show the volutions. Diameter, 
0°3-0:°4. Georgia, Florida. 
H. avara, (Say, Ib. Vol. 1, p. 277.) Spire convex. Whorls four, rounded, wrinkled, and furnished 
with many short robust hairs. Aperture with two projecting obtuse teeth on the outer lip, separated 
by a deep sinus; pillar-lip connected to an elongate lamelliform oblique tooth on the penultimate 
whorl. Umbilicus moderate, not showing the volutions. Diameter, 0-25. Florida, Carolina. 
H. aspersa. (Frrussac, Moll. pl. 18.) 
* * WHORLS ANGULAR. 
H. spinosa. Carocoita id. (Lea, lc. Vol. 4, p. 104, pl. 15, fig. 35. Binney, Bost. Jour. Vol. 
3, pl. 11; and Pt. 6, fig. 114 a. B. of this book.) Shell lenticular, thin, diaphanous, imperforate. 
Carina acute, with minute spines. Whorls 6. Spire nearly planular, being guarded by a long 
tooth on the columella. Outer lip irregularly thick, angulated near the upper termination. Diame- 
ter, 0-6. Alabama. 
This belongs to the genus Carocolla of Lamarck, and Helicigona of Ferussac, but is considered 
by later writers as a merely artificial section. 
H. cumberlandiana. Carocouta id. (Lea, Am. Tr. Vol. 8, p. 229, pl. 6, fig. 61.) Shell lenticular, 
carinate, striate, widely umbilicate, impressed above and below the carina. Whorls 5. Aperture 
angular, within furrowed. Lip acute. Color, whitish brown, spotted. Length, 0-14; diameter, 
0°54. Tennessee. : 
H. lasmadon. (Putwirs, Ac. Sc. Vol. 8, p. 182.) Shell minute, moderately elevated, lenticular, rather 
thick, umbilicate, faintly striate. Aperture compressed, with one or two lamellar teeth. Color, 
light horn, Alabama. 
