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 subinimersed, suture profoundly impressed. Diam.3 mill. 



Sydney, Australia. 

 H. STROUDENSIS, Cox. PI. 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. PI. 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. COCHLIDIUM, Cox. PL 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^, convex, spire plane, last whorl narrow, 

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



Clarence River, Australia. 



More strongly sculptured than H. pexa. 



H. BELLI, Cox. PI. 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. PI. 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. 



