14 OLEACINIDA. 
STREBELIA, Crosse and Fischer, 1868. 
Syn.—Physella, Pfeiffer, 1861 (not Hald., 1842). Spirobulla, 
Ancey, 1881. 
Distr.—1 sp. Mexico. S. Berendti, Pfeiffer (xcii, 50). 
Shell bulliform, spire very short, the last whorl elongated, 
comprising nearly the entire length of the shell; columella 
simple, arcuated, not truncate ; peristome simple, acute. Animal 
much larger than the shell. 
OvEAcINA, Bolten, 1798. 
Syn.—Cochlicopa, Fer., 1819. Pfaffia, Behn., 1844. 
Disir.—142 sp. U.S. (Gulf States), West Indies, Mexico, 
Central American, Northern South America, So. Europe (one 
species), Algiers. Fossil. Cret.—; Europe. 
Shell oval-oblong, with a thin, smooth olivaceous epidermis ; 
last whorl large, sometimes attenuated at the base; aperture 
elliptical- oblong, equaling or exceeding half the length of the 
shell; outer lip simple, sharp, usually somewhat inflected in the 
middle. 
VARICELLA, Pfeiffer, 1855. Shell with longitudinal varices. 
O. leucozonias, Walch. 
MELIA, Albers, 1850. Shell fusiformly turreted, longitudinally 
subcostate ; whorls rather flattened ; columella twisted, obliquely 
truncate ; aperture narrow, semioval ; lip simple, submarginate 
within. O. simplex, Strebel. 
BOLTENIA, Pfeiffer, 1878. Typical group of Oleacina.. O. 
oleacea, Fer. (xcii, 51). Cuba. 
POIRETIA, Fischer, 1883. Animal with feebly developed labial 
pulpi. Formed for 0. Algira, Brug., the only European species. 
GLANDINA, Schum., 1817. (Polyphemus, Mont., 1810. HEuglan- 
dina, Crosse and Fischer, 1870.) Shell oblong-oval, fusiform, 
corneous, covered by a thin, fugacious epidermis ; spire more 
or less elevated, of six or eight whorls: columella thin, areuated, 
truncated at pase ; aperture rather narrow, longitudinal; lip 
sharp, simple. 
Animal much longer than the shell, when extended ; oculiferous 
tentacles deflected at the tips, beyond the eyes ; inferior tentacles 
much shorter, also deflected ; lips elongated, tentacular ( vi, 72). 
O. Carminensis, Morelet (xcii, 52). O. truncata, Gmel. ane 53). 
Florida. These animals are predaceous in their habits, and carniv- 
orous; they attack with avidity Bulimi as large as themselves, 
and devour them. When they ‘have chosen a victim they probe 
the aperture with their palps before penetrating it; the buccal 
mass is then protruded, and the contents consumed ‘thr ough the 
aperture they make. The species inhabit tropical America— 
mainly Mexico and Central America, although a few species occur 
in the southern United States. The shells are of larger size 
