ZONITES. 



455 



f5gs. 1-3. — "Reeve, Con. Icon. G7.') (1852) — W. G. Binney, Terr. Moll. iv. 105. 



— Mousio, Ain. Nut. I. 31;}, %*. 23, 24 (1867). 

 Helix oi/jti/area, Pfkiffku, Syiiib. ii. 24, not Fek. teste Pfr. 

 Omphidinit cnprM, Rafinesque, Enuni. and Ace. 3; ed. Binney and Tryon, 67 

 Hijalina faliyiiiosa, Tryon, Am. Jouni. Conch, ii. 248, pi. 3, fig. 16 (1866). 



Shell thin, depressed on the upper surface ; ep- 

 idermis dark, approaching to chestnut color, shin- 

 ing- and smooth, wrinliled ; Avhorls four and a half, 

 rapidly increasing, with irregular oblique wrinkles, 

 the last whorl very voluminous, and expanding 

 transversely towards the aperture ; suture very 

 little impressed ; aperture very oblique, ample, 

 lunate-ovate, within pearly or iridescent ; peris- 

 tome simple, thin, brittle, with a light, testaceous 

 deposit within, the two terminations approaching 

 each other very nearly, that of the columella some- 

 what reflected ; umbilicus deep, not much expand- 

 ed. Greater diameter, twenty-six mill. ; lesser, twenty-two mill. ; 

 height, thirteen millimetres. 



Has been found in nearly all the Northern, Western, Middle, and 

 some of the Southern States. In one case I have known of its being 

 found at the northern side of Lake Superior. 



Z. fuUginosa. 



Family PHILOMYCID^. 



Lingual membrane very broad, teeth uniform, in numerous close, 

 straight, transverse rows, the central large, obtusely conical, broad, 

 laterals the same, the inner ones surmounted by a pointed apex. 



Jaw horny, arcuate, strongly striated, its extremities blunt, con- 

 cave margin irregular, scarcely bluntly projecting in the centre, ver- 

 tically convex in the middle. 



Animal liraaciform, elongated, tapering behind. Eyes at the end 

 of retractile cylindrical peduncles ; tentacles short. Mantle thin, 

 large, entirely covering the back. Respiratory orifice on the right 

 side near the head, above the edge of the mantle. Foot narrow, 

 elongate, simple, posteriorly extending beyond the mantle, no loco- 

 motive disk. Vent a little above and before the respiratory orifice. 

 Male and female organs with the same orifice behind and below the 

 right eye-peduncle. 



No internal shell. 



