OLEACINID^. 13 



mantle, under the peristome of the shell. Predaceous, devouring 

 small Helices, Vitrina and Clausilia. 



Shell small, external, perforate, depressed ; paucispiral, whorls 

 rapidl}'' increasing. 



RUFiNA, Clessin. Shell umbilicated. D. rufa^ Drap. 



PSEUDOLiBANiA, Stcfaui. Shell haliotiform, spire very short, 

 narrow!}^ rimate, columellar lip slightly reflected over the 

 umbilical slit. D. Langi, Pfr. 



LiBANiA, Bourg. Umbilicus covered in the adult. D. Saulcyi^ 

 Bourg. 



issELiA, Bourguignat. Shell perforated. Animal with caudal 

 mucous pore. D. {Helicarion) Sardous, Issel. 



Chlamydophorus, Binney, 1819. 



Distr. — C. Gibbonsi, Binne}^ (ci, 47). Natal. 



Mantle covering the whole body, with an orifice on the centre 

 of the back near the tail, enclosing at the same part a solid 

 internal shelly plate ; no caudal mucous pore ; no jaw ; teeth as 

 in Glandina. Position of the genital orifice unknown. 



Plectrophorus, Fer., 1819. 



Distr. — 5 sp. Tenerifle. P. Orbignyi., Fer. (ci, 48). 



Animal elongated, subcylindrical, with a tough dorsal anterior 

 integument or mantle, under which is the pulmonary cavity, 

 having its orifice on the right side, with the anal orifice near it ; 

 there is a second long and narrow posterior mantle, and an 

 external rudimentary conical, non-spiral shell near the posterior 

 extremity ; upper tentacles longest, oculiferous, retractile. 



This animal has not been recognized ; the doubly armored 

 back and conical external shell are both improbable characters. 



Selenochlamys, Bottger, 1883. 



Distr. — S. 2')allida^ Bottg. Caucasus. 



Animal resembling Daudebardia, but without a shell ; mantle 

 small, the surface divided by longitudinal sulcations ; tail short, 

 compressed, carinated ; foot narrow, tripartite. 



Family OLEACINID^. 



Shell fusiform, corneous, more or less transparent, rarely 

 banded longitudinally ; aperture longitudinal, narrow ; columella 

 twisted or truncated at its base. Lingual teeth numerous, in 

 more or less curved, transverse rows, the central teeth inconspic- 

 uous, the marginal aculeate, or with a single, long, recurved 

 apex (xiii, 56, 57). Head short, with a retractile, often produced, 

 buccal sac ; eyes at the tips of elongated, cjdindrical, retractile 

 peduncles ; inferior tentacles moderate, situated below the eye- 

 peduncles ; foot elongate, narrow, simple posteriorly. 



Living in humid situations ; carnivorous. 



