EASTERN PRO VIXCE— SOUTHERN REGION SPECIES. 385 



Helix tridenfata, vnr., Binxey, in Bost. Jonrn. Nat. Hist., iii,382, pi. xviii, fig. 2. — F6- 



RUSSAC, Hist., pi. 11, tig. .3, small fi;iure on tlic left. 

 Helix iridentala, var. ephahus, sSay, of Ravenel's Cat., 9 (1834), no rlesrr. 

 Triodopsi^ Hopetonensis, Tryon, Am. Jouru. Couch. , ii, 52 (1867). — \V. G. Binnet, Terr. 



Moll., V, 311. 



A species of the Florida Subregion, ranging as far north as New- 

 berne, N. C, as far south as Fort George, Saint John's Eiver. 



It diflers from T. fallax in its smaller, scarcely pervious umbilicus, its 

 deeper color, lighter peristome, and denticles being more widely sepa- 

 rated. 



Jaw as usual in the genus ; over 10 ribs. 



The lingual membrane (Terr. Moll., V, Plate VII, Fig. N") has 27-1- 

 27 teeth, as far as I can judge from an imperfect membrane. There 

 are 7 laterals, the eighth tooth having its inner cutting point bifid. 



Genitalia (Terr. Moll., V, Plate XV, Fig. A) readily distinguished 

 from those of fallax, trklentafa, and others of the group by the length 

 and cylindrical form of the genital bladder, and by the size of the duct 

 of the same, which for a small portion of its course is considerably 

 smaller than the bladder, and then suddenly enlarges and gradually 

 expands until it reaches the vagina; in this particular the species is 

 more like tridenfata than fallax. 



Triodopsis LiCvettei, Bland. 



" Shell umbilicate, orbiculate convex, thin, shining, translucent, 

 slightly and irregularly obliquely striated, chestnut- fig. 419. 



colored, the upper whorls paler ; spire scarcely ele- 

 vated, apex obtuse; suture impressed; whorls 7, 

 rather convex, gradually increasing, the last some- 

 what depressed at the aperture, obsoletely spirally 

 striated, constricted behind the aperture, and slightly 

 scrobiculated ; base subconvex ; umbilicus moderate, 

 one-eighth diameter of the shell, pervious ; aperture 

 very oblique, subcircular, with a well-developed, flex- 

 nose, transverse white tooth on the parietal wall; T.Levctiei. 

 peristome reflected, pale chestnut colore<l, thickened within, the mar- 

 gins joined by a slight callus, the right margin with a white, obtuse, 

 erect, submarginal tooth, the basal margin with two white transverse 

 teeth, the upper one the larger. 



iN'ear Santa Fe, X. Mex., where two living and one dead specimen 

 were collected by my friend Dr. G. M. Levette, who presented to mo 

 1749_Bull. 28 25 



