Occasional Papers of the Museum of Zoology 23 



The raclula of this species is quite close to that of Poenia s.s., 

 but the shell sculpture consists of axial, instead of si)ira! rib- 

 lets. This seems a valid basis for the separation of a ncv 

 section: Poeniella, type H. (plicatula) cliristoplwri Pils- 

 bry (1897) from St. Kitts. L. ignicoma ( Guppy. 1868) from 

 Trinidad, appears to be a member of this group. 



In addition to the above Helicininae, Entroclmtclla (sub- 

 genus s.s.) scmilirata (Pfr.. 1849) li^s been described from 

 Venezuela. As it has not been reported since, the presence of 

 this subgenus in South America still remains very doubtful, 

 although a member of the subgenus Pyrgodomus might be 

 expected. 



PROSERPIXID.E 



Proserpina (Linidiclla) swifti Bland (1863). 



One specimen, without animal, from leaf -mould in corner 

 of buttressed tree, along Rio San Esteban (H, I, b, 2). It 

 measures: height 4.6 mm.; maj. diam. 187 (8.6 mm.). 



POMATIASID-E 



Tudora plicatula (Pfeififer). 



Cyclostoma plkatuliim Pfeiffer (1846). Puerto Cabello. Venezuela. 

 '/Cyclostoma tanisiaiia Pfeiffer (1850). Puerto Cabello 

 FCyclosfoma cumancnsc Pfeiffer (1851). Cumana. ^''enezuela (L 11, 64). 

 ■'Cyclostoma vcuczuclcusc Pfeiffer (1853). \'enezuela. 



Xinety-six specimens ; mainly from rather well-drained for- 

 est (H, II); at Palma Sola (stations 20, 22), and Boqueron 

 (stations 2"/, 28) ; the most abundant large snail, wherever 

 found. This species aestivates under leaves in rich leaf- 

 humus (H, II, b), but, during rains, soon travels up into the 

 vegetation (H, II, d), as high as 3 meters above the ground. 

 Its jerky movements are more rapil than those of most snails, 



