CONCHOLOGY. 



on the outer whorl. Breadth of the fe- 

 male nearly half an inch; of the male 

 about three-tenths. 



Inhabits Florida. 



Jour. Acad. Nat. Sciences, vol. i. p. 277". 



This curious species we found near St. 

 Augustine, East Florida, in a moist situa- 

 ation. They were observed in conside- 

 rable numbers ; the colour is a reddish 

 brown, indistinctly banded with whitish 

 lines, sometimes with darker ones, mouth 

 white. 



2. P. Avara. Shell covered with nume- 

 rous short, robust hairs; spire convex; 

 whorls four, regularly rounded, with hard- 

 ly elevated lines forming grooves, which 

 are much more conspicuous near the 

 mouth ; mouth subreniform, two project- 

 ing, obtuse teeth on the outer lip, within 

 separated by a deep sinus ; outer lip ele- 

 vated, equal, describing two-thirds of a 

 circle ; pillar lip elevated, broadly but not 

 profoundly emarginate, concave beneath, 

 and connected by the inner side to an 

 elongated lamelliform tooth, which is 

 placed obliquely on the penultimate 

 whorl, near the middle of the mouth ; 

 lips almost equally prominent, continued ; 

 umbilicus moderate, not exhibiting the 

 volutions, no groove on the ultimate whorl 

 within it. Breadth one-fourth of an inch . 



Inhabits Florida. 



Jour. Acad. Nat. Sciences, vol. i. p. 277. 



Animal longer than the breadth of the 

 shell, acute behind, above granulated and 

 blackish, beneath, and each side, white. 



This we found in the orange groves of 

 Mr. Fatio, on the river St. John, East Flo- 

 rida ; it is usually covered with a black, 

 earthy coat, which is probably collected 

 and detained by the hairs. When unin- 

 cumbered with this vesture, the shell is 

 of a horn colour. It is by no means so 

 common as the preceding species. 



3. P. Septemvolva. Shell much depress- 

 ed, discoidal; spire not prominent; whorls 

 seven, perfectly lateral, compressed, de- 

 pressed, and marked with conspicuous 

 lines and grooves above, a projecting ca- 

 rina on the upper edge of the body whorl, 

 beneath which the lines and grooves are 

 obsolete : aperture subreniform, not con- 

 tracted ; lips equal, elevated, outer one 

 reflected, regularly rounded so as to de- 

 scribe two-thirds of a circle, pillar lip pro- 

 jecting inwards into an angle or tooth, 

 which is concave beneath ; beneath, the 

 four exterior volutions equally prominent, 

 transverse diameters equal to those of the 

 tipper surface ; umbilicus central, mode- 

 rate, attenuated to the apex so as to ex- 

 hibit the remaining volutions. Breadth, 



female two-fifths; male three-tenths of 

 an inch. 



Inhabits Georgia and East Florida. 



Journ. Acad. Nat. Sciences, vol. i. p. 278. 



A very .common shell in many parts of 

 Georgia, particularly the sea-islands, also 

 in East Florida. We found them nume- 

 rous under the ruins of old fort Picolata, 

 on the St. John's river, and on the Oyster- 

 shell Hammocks, near the sea, and in other 

 situations, under decaying Palmetto logs, 

 roots, &c. 



These shells would have been referred 

 by Linne* to the genus Helix, but as that 

 genus has been limited by Mr. Lamarck, 

 and others, to those shells of which the 

 apertures are broader than long, I cannot, 

 in the present state of conchology, con- 

 sider them as of that genus. Neither can 

 1 refer them to either of the genera which 

 have been separated from Helix by 

 Messrs. Lanaarck, Montfort, &c. by the 

 characters which those naturalists have 

 given of their genera. They differ from 

 others in having the pillar lip elevated 

 considerably above the surface of the pe- 

 nultimate whorl, so as to be equally pro- 

 minent with the outer lip, with which it 

 forms an uninterrupted continuation, and 

 by the concavities beneath the lips, form- 

 ed by the protrusion of a portion of the 

 shell into the aperture. In this last cha- 

 racter it approaches the genus Caprinus 

 of Mr. Montfort, but differs in being um- 

 bilicated. 



GENTS OLTGTRA. 



Shell rounded; aperture longer than 

 broad, semiorbicular, emarginated by the 

 projection of the penultimate whorl ; ex- 

 ternal lip reflected; pillar lip with obso- 

 lete calcareous deposit ; umbilicus none ; 

 columella slightly angulatedat base. 



Animal terrestrial, operculated ; tenta- 

 cula two, filiform ; eyes prominent, plac- 

 ed at the external base of the tentacula ; 

 rostrum bilabiated at tip, shorter than the 

 tentacula ; foot simple. 



O. fobiculata. Shell subglobular ; spire 

 not prominent, but more than convex ; 

 lateral line somewhat convex ; whorls 

 five, obsoletely striated across, regularly 

 rounded, colour pale, greenish, yellowish, 

 or slightly tinted with reddish, particu- 

 larly on the body, and margined above by 

 an obsolete white line, on the middle of 

 the body a white vitta revolves, sometimes 

 obscure or wanting; aperture acute above, 



