168 VELIFERA, HELICARION. 



Genus YELIFERA, W. G. Binney, 1879. 



V. GABBI, W. G. Binney. PL 29, figs. 73, 74. 



Ivnperforate, globose, very thin, pellucid, polished, olivaceous 

 brown ; whorls 3 ; aperture rounded, slightly oblique ; peristome 

 simple, flexuose above. Diam. 6, alt. 4 mill. 



Animal greenish, with a black band above the margin of the 

 foot and a second broader band a little higher up, broken by 

 oblique light lines, median line of back nearly white. 



It has the peculiarity when distressed, as with the warmth of 

 the hand, of throwing itself like a worm, with vigorous blows of 

 its tail. 



Flanks of Pico Blanco, 3000 ft., Costa Rica. 



Genus HELICARION, Fer., 1821. 

 I. Australian and Polynesian Species. 



This group is composed of the typical Helicarise, according 

 to Godwin-Austen, as well as a few Australian species 

 described as Vitrihae. The latter I have placed at the end of 

 my list, but included them here because Dr. J. C. Cox, in his 

 Monograph of Australian Land Shells, states that all the 

 Australian Vitrinae have a caudal mucous pore. 



H. FREYCINETI, Fer. PL 38, figs. 32-35. 



Thin, smooth, faintly plicately striated, shining, opaque, 

 orange-brown, suture linear; whorls 3^, the last narrow at the 

 base ; lip narrowly membraneous-margined. 



Diam. 19, alt. 8 mill. 



Australia. 

 H. CUVIERI, Fer. PL 38, figs. 36-38. 



Subglobosely depressed, lightly striate, greenish brown ; 

 whorls 3, the last large, rounded. Diam. 11, alt. 6'5 mill. 



Australia. 



This species, founded on figures in Ferussac, has not been 

 certainly identified by modern collectors. 



H. LEUCOSPIRUS, Pfr. PL 38, fig. 39. 



Depressed subglobose, very thin, striulate, pellucid, shining, 

 yellowish white, the apex whitish ; whorls 4, the last slightly 



