24 HELIX. 



H. ETA, Pfr. PI. 3, fig. 12. 



Rather widely umbilicated, depressed, silky, yellowish white, 

 ribs very close, about 40 in the tenth of an inch, suture impressed ; 

 whorls 4, barely convex, the last wider, depressed. Diam. 3 mill. 



New Zealand. 

 H. corniculum, Reeve, is a synoi^m. 



H. DIEMENENSIS, Cox. PI. 3, figs. 16-18. 



Widely umbilicated, thin, translucid, with a number of some- 

 what prominent subarcuate costulations, not shining, yellowish, 

 radiately ornamented with chestnut strigations ; whorls 4^, slowly 

 increasing, a little convex, the last rounded at the periphery. 



Diam. 9 mill. 



Tasmania. 



This has been suspected to be a variety of the New Zealand 

 H. coma, Pfr. not Gray = H. lucetta, Button. Mr. Petterd 

 reduces the following Tasmanian species to synonyms of this : 

 H. Thomsoni, H. Daveyensis, H. Atkinsoni, H. Camillse, and H. 

 Wellingtonensis, Cox (figs. 17, 18). 



H. CUPREA, Cox. PI. 3, figs. 21, 22. 



Widely umbilicated, discoidal, copper-colored, shining, suture 

 wide ; whorls 4-^-5, moderately increasing, the last with rounded 

 periphery, closely, lightly striate above and below, a little de- 

 flected in front. Diam, 2 -5 mill. 



King George's Sound, Australia. 



H. SATURNI, Cox. PL 3, fig. 23. 



Widely, perspectively umbilicated, discoidal, subconcave 

 above, everywhere costulate, reddish corneous, a little shining ; 

 whorls 5, convex, the last tumid, spire subimmersed, suture 



deep. Diam. 2-5 mill. 



Sydney, Australia. 

 H. costulata, Cox, is a S3 r nonym. 



H. BRAZIERI, Cox. PI. 4, figs. 24, 25. 



Umbilicus perspective, very wide, plano-discoidal, thin, lightly, 

 very closely costulate, the interstices decussated by slight lines, 

 ash-color, with chestnut lines and strigations, spire plane, suture 

 deep; whorls 5, regularly increasing, the last rounded, costulate 



below as above. Diam. 3*3 mill. 



CooFs Ewer, Sydney, Australia. 



