FOSSIL SPECIES OF IIELICINA. 



Ill 



more convex, subtriaugulate, the last subcarinate, rather 

 convex below ; columella short, arched, dilated, marked 

 with a white line, and covered with a light callus ; aper- 

 ture rather oblique, irregularly semioval ; peristome wide, 

 angularly spreading, sub-excavated, narrowing at each 

 extremity. Greater diam. 10, lesser 8^, height 7 mill. 

 iPfeiffer.-) 



Fig. 220. 



Hdicina 

 subfflobulosa. 



Helicina suhglohulosa, Poet, Mem. 1, 115, 120, tab. xii, f. 17-21. — Pfeiffer, 

 Malak. Blatt. 1854, 107 ; 185(3, 146 ; Mon. Pneum. Viv. II, 209.— 

 W. G. BiNNEY, T. M. IV, 195, pi. Ixxv, f. 17. 



Fort Dallas and Key Biscayne, Florida. Also Cuba. 

 The specimens received may, perhaps, be referable to Eel. 

 subdepressa, Poey. 



Spurious Species op Helicina. 



Helicina fasti giata and plicata of DeKay, N. Y. Moll. 82, are respectively 

 Helix fastigans and Helix hazardi. 



Fossil Species of Helicina. 



Helicina occulta, Say. — Shell small, rather solid, low conical, acute 

 at apex, cretaceous, obviously striated ; spire of five nearly plane 

 whirls, the last of which is angular at the periphery, and this 

 angle continuing up the spire adjacent to the suture, 

 makes it appear double; the aperture is small, semi- Yig. 221. 

 lunar ; the peristome is scarcely reflexed, but is thick- 

 ened internally; the columella is very short, and joins 

 the peristome by a slightly waving curve, without form- 

 ing an angle. Diameter 6, height 5 mill. 



Helicina occulta. Sat, Transylv. Joum. of Med. IV, 



528 (1831) ; Descr. of New Terr, and Fluv. Shells (from 

 the Diss.), p. 15 (1840) ; Am. Conch. V, pi. xlvi, f. 4-6 

 (1832) : ed. Binney, p. 37, pi. xlvi, f 1-3 — Bixney, Terr. 

 Moll. U. S. II, 356, pi. Ixxiv, f. 1, 2.— DeKay, N. Y. Moll. 

 82 (1843). — Pfeiffer, Mon. Pneum. Viv. I, 347.— Chem- 

 nitz, ed. 2, 18 (184G), pl. iv, f. 11, 12 (1850).— Gray & 



