23 



DESCRIPTION OF THEEE NEW TASMANIAN 

 HELICES, 



By Lieutenant C. E. Beddome, I.N., 



Collected on a trip from Chudleigli to Mount Bisclioff, made 

 by R. M. Johnston, Esq., T. R. Atkinson, Esq., and 

 the describer. 



[Bead April 8, 1879.] 



Hdlx antlalha. — C. E. Beddome. 



Shell umbilicated, concave on both sides, thin, covered -with thread-like 

 riblets, not shinmg, white to brown, spire deeply concave, nearly meeting 

 the umbilicus, whorls Qh slowly increasing, convex, last rounded, higher 

 than broad, below ribbed as above, umbilicus perspective, deep, about 3 of 

 the diameter of shell ; aperture, semilunar ; peristome, simple ; columella 

 margin smooth and shining. 



Diam. — Greatest, 2^ ; least, 2 ; heights, 1 mill. 



Found in, and under decayed timber. ' 



Habitat, Gad's Hill and Mount BischofF, K^y. Tasmania. 



Var., B brown, found only at Mount BischofF, N.W. Tasmania. 



Helix Bisclioffensis. — C. E. Beddome. 



Shell imperforate, flatly globose, whitish bro^vn, very finely striated, the 

 sbria3 crossed with very fine Hues, giving the shell a granulated appearance ; 

 spire roundly depressed, whorls 6|, slowly increasing, last rounded, descend- 

 ing, suture deep, aperture semilunar, peristome slightly thickened and re- 

 flected, columella smooth. 



Diam. — Greatest, 2| ; least, 2 ; heights, 2 mill. 



Found under dead timber. 



Habitat, Gad's Hill and Mount Bischoflf, N.W. Tasmania 



Helix, Gadenais. — C. E. Beddome. 



Shell with a large perspective umbilicus, equalling ^ of its diameter, 

 depressed, thin, homy yellow, whorls 4|, slowly increasing, regularly, finely 

 striated above and below, suture deep, mouth ovately lunate, margins dis- 

 tant, joined by a very thin callus. 



Diam.— Greatest, 2 ; least. If ; height, mill. 



Found in and under decayed timber. 



Habitat, Gad's Hill to Mount Bischoff, N.W. Tasmania, 



