ZONITES. Ill 



Jaw ns usual in tho. p;(Mius. 



The lingual inembranc (PI. III. Fig. C) has 32—1—32 teeth, with G perfect 

 lat4.u'al.s. 



Of the genitalia I can only state the existence of the dart sac and dart as in 

 Z. ligcrus. 



Zoiiites ceriiioideus, Anthony. 



Shell perforated, globosely flattened, shining, light horn-color, scarcely 

 wrinkled by lines of growth ; whorls 7, hardly convex, the last slightly in- 

 flated below ; aperture oblitiue, subcircular ; peristome simple, 

 acute, its ends joined by a light callus. Greater diameter 7, ^^ 



lesser 6 mill. ; height, 3 mill. 



Helix cerinoidea, Anthony, Am. Journ. Conch., I. 351, PI. XXV. 

 Fig. 4 (Oct. 1865). 



Mesom^yhix cerinoidea, Tryon, Am. Joum. Conch., II. 255, PI. IV. 

 Fig. 36 (1866). 



Eyalina cerinoidea, W. G. Binney, L. & Fr.-W. Sh., I. 30, Fig. JZldL. 

 30 (1869). 



Jacksonville, Fla. ; Charleston, S. C. ; Newbern, N. C. ; Norfolk, Va. It 

 may be a species of the Florida Subregion, thence ranging northward along the 

 Atlantic Coast. 



The specimen figured was loaned by Mr. Anthony. 



Animal with mucus pore, longitudinal furrows, and locomotive disk charac- 

 teristic of the genus. 



A form of this or some allied species furnished with two lamellar teeth 

 within the aperture has been noticed as var. cuspidata, by Lewis, Proc. 

 Phila. Ac. Nat. Sc. 1875, 334. 



Jaw as usual in the genus. 



Lingual membrane with 34 — 1 — 34 teeth; 9 perfect laterals (PL HI. 

 Fig. B). 



Genitalia with dart and sac as in Z. ligerus. 



Subgenus HYALINA, s. s. 



Animal as in Mesompliix (see p. 98). 



Shell umbilicated, sometimes perforated, depressed ; shining and vitreous ; 

 whorls 5 or 6, regularly increased ; spire very rarely conic-elevated ; aperture 

 rounded lunate ; peristome thin, acute, straight. 



Zonites cellarius, Mijller. 

 Vol. III. PI. XXIX. Fig. 4. 



Shell very much depressed, thin, fragile, pellucid ; epidermis light greenish 

 horn-color, smooth, highly polished ; whorls 5, slightly rounded, with minute 



