. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. ZONITES. Ill Jaw as usual in the genus. The lingual membrane (PL III. Fig. C) has 32—1—32 teeth, with G perfect laterals. Of the genitalia I can only state the existence of the dart sac and dart as in Z. ligerus. Zonites cerinoideus, 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 oblique, subcircular; peristome simple, acute, its ends joined by a light callus. Greater diameter 7, .^L
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. ZONITES. Ill Jaw as usual in the genus. The lingual membrane (PL III. Fig. C) has 32—1—32 teeth, with G perfect laterals. Of the genitalia I can only state the existence of the dart sac and dart as in Z. ligerus. Zonites cerinoideus, 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 oblique, subcircular; peristome simple, acute, its ends joined by a light callus. Greater diameter 7, .^L. ' loser 6 mill.; height, 3 mill. Helix cerinoidea, Anthony, Am. Journ. Conch., I. 351, PI. XXV. Fig. 4 (Oct. 1865). Mesomphix cerinoidea, Tryox, Am. Journ. Conch., II. 255, PI. IV. Fig. 36 (1866). Hyalina cerinoidea, W. G. Binney, L. & Sh., I. 30, Fig. 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, 331. Jaw as usual in the genus. Lingual membrane with 34—1—34 teeth; 9 perfect laterals (PI. III. Fig. B). Genitalia with dart and sac as in Z. ligerus. Subgenus HYALINA, s. s. Animal as in Mtsomjih'u (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, Muller. 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. Please
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