34 
Synonyms. 
Helix thyroidus. — Nobis, Journ. Acad. Nat. Sc. vol. i., p. 123. 
Nicholson’s Encycl. (Am. edition.) 
Ferussac, Tabl. System, p. 33. 
Cochlea umbilicata, capillaceis stryis per obliquum donata. 
Unico dente ad fundum oris. List. Synopsis Conch.pl. 91, f. 91. 
The following synonyms are from Ferussac, Tab. Sys. Petiver, 
Gazophyll. t. 405, f. 4 — Philos. Trans, vol. xx., p. 3^5. 
Cochlea terrestris Virginiana, &c. Schroter, Enleit, ii., p. 192, 
No. 60. 
A very abundant species, much more numerous than the pre- 
ceding in this region. It has certainly a general resemblance to 
the alholahris^ but it is smaller, always umbilicated ; the labrum, 
near its junction with the penultimate whorl, is not so flatly 
reflected, and the tooth of the labrum is very conspicuous. It 
belongs to Montfort’s genus Cepolis^ plate 13. 
Glandina truncata. 
Synonyms. 
Buccinum striatum. Chemnitz, ix., t. 120, fig. 1028, 1029, 
(Ferussac.) 
Bulla truncata. Gmel. Dillwyn, (Fer.) 
Polyphemus glans. Nobis. Nicholson’s Encycl. 
Helix rosea. Ferussac. 
e flumine quodam Carolinae. List. Conch. 1059, fig. 4. 
Shell pale reddish brown, or slightly tinted with rosaceous, 
often deepest on the spire, gradually becoming paler to the aperture ; 
spire rather prominent, somewhat mammillary at tip ; volutions 
five or six, very obviously wrinkled ; two or three apicial volutions, 
almost destitute of wrinkles ; suture well defined, irregularly 
crenulated ; columella decidedly incurved. 
When in the Sea Islands of Georgia and Florida with Mr. 
Maclure, we found this species in great abundance in marshy dis- 
tricts immediately behind the sand hills of the coast. In Florida 
they also occurred on elevated mounds of oyster shells, called 
hommocks, and generally in such situations as are tenanted by 
Succinea campestris^ Hob. On these elevations they were gene- 
rally small, translucent, and of a fragile consistence, and we 
observed that they obtained their greatest development only in 
