HELIX. 25 



H. LIRATA, Cox. PI. 4, figs. 26, 27. 



Widely, perspectively umbilicated, plano-discoidal, regularly 

 strongly costate, chestnut corneous ; whorls 3^, the last rounded, 

 spire subimmersed, suture profoundly impressed. Diam. 3 mill. 



Sydney, Australia. 

 H. STROUDENSIS, Cox. PL 4, figs. 28, 29. 



Widely umbilicated, discoidal, thinly costulately striate, con- 

 vex, suture impressed, brownish ; whorls 5, spire truncate. 



Diam. 3 mill. Stroud, Port Stephens, Australia.* 



H. PEXA, Cox. PL 4, figs. 30, 31. 



Widely umbilicated, almost discoidal, thin, translucent, regu- 

 larly, closely, arcuately costate, costse appearing as though in 

 pairs, light j^ellowish corneous, spire plane, suture moderate; 

 whorls 4, convex, the last narrow, rounded. Diam. 2 mill. 



Greystanes, N. So. Wales. 

 H. COCHLTDIUM, Cox. PI 4, figs. 32, 33. 



Umbilicus wide, scarcely narrower at the bottom, shell thin, 

 translucent, dull vitreous, with numerous thin, elevated, curved 

 riblets, the interstices lightly, very minutely granulate and 

 lineate ; white ; whorls 4-J, convex, spire plane, last whorl narrow, 

 rounded, a little inflated and plicate below. Diam. 2*25 mill. 



Clarence JRiver, Australia. 



More strongly sculptured than H. pexa. 



H. BELLI, Cox. PL 4, fig. 36. 



Widely and perspectively umbilicated, discoidal, depressed 

 and subconcave, regularly costellate, reddish chestnut color, a 

 little shining ; whorls 5, somewhat convex, the last tumid, suture 

 deeply impressed. Diam. 1-75 mill. 



Sydney, Australia. 

 H. COLLISI, Brazier. PL 5, figs. 79, 80. 



Widely umbilicated, shining, yellowish corneous, lightly 

 striate above, smooth below, suture strong impressed ; whorls 

 5, regularly increasing, convex, narrow, the last a little descend- 

 ing, excavated around the umbilicus. Diam. 1'75 mill. 



Ml. Wellington, Tasmania. 



Described as H. minima, Cox, preoccupied by H. Adams for 

 a Mauritian species. 



