19 



FAMILST OLEACINID^. 



Animal with short head, with a retractile, often produced 

 buccal sac ; eyes at the tips of long, cylindrical, retractile 

 peduncles; inferior tentacles mpderate ; foot elongate, narrow, 

 simple posteriorly. Lingual teeth numerous, the transverse 

 rows more or less curved ; central teeth inconspicuous, marginals 

 aculeate, or with a single long recurved apex. 



Shell spiral, fusiform, corneous, more or less transparent, 

 rarely longitudinally banded ; aperture longitudinal, narrow ; 

 columella twisted or truncated anteriorly. 



Living in humid situations ; carnivorous. For the habits of 

 the Oleacinidse, see " Structural and Systematic Conchology," 



iii, 14. 



Synopsis of Genera. 



Genus STREBELIA, Crosse and Fischer, 1868. 



Shell bulliform, with very short spire, the last whorl nearly 

 the total length of the shell ; columella simple, arcuate, not 

 truncate, peristome simple, acute. 



Animal much larger than the shell. 1 Mexican species. 

 (Physella, Pfr., 1861, not Hald., 1842, and Spirobulla, Ancey, 

 1881, are synonyms.) 



Genus OLEACINA. Bolten, 1798. 



Shell oval-oblong, with a thin, olivaceous, shining epidermis ; 

 last whorl large, sometimes attenuated at the base ; aperture 

 elliptical-oblong, half or more than half the length of the shell ; 

 columella twisted or truncate below, outer lip simple, frequently 

 somewhat inflected in the middle. 150 species, mostly American 

 and subtropical. Fossil. Cret. ; Europe. 



(Polyphemus, Montf., 1810; Glandina, Schum., 1817; Cochli- 

 copa, Fer., 1819 ; Pfaffia, Behn., 1844.) 



Section BOLTENIA, Pfr., 1878. (Typical group.) 



Section VARICELLA, Pfr., 1855. Shell longitudinally plicate 

 or striate, occasionally varicosely thickened, with a few longi- 

 tudinal colored strigations ; columella obliquely truncate, outer 

 lip slightly compressed in the middle. Mexico, Central America, 

 West Indies. 



Section MELIA, Albers, 1850. (Turritse, Pfr., 1878.) Shell 

 fusiformly turreted, longitudinally subcostate ; whorls rather 



