HELIX-HADRA. 135 



fied the species. The differential characters of species of the H. 

 grayi group are largely a matter of personal opinion. No exact 

 locality is given by Ferussac, whose figures should be consulted if the 

 identification of the form be attempted. 



Prof. Ralph Tate records it from Arnhem Land, N. Australia, at 

 Port Essington and Palmerston. He remarks that the periostracum 

 of the young shell is raised into short bristles and traces of them 

 may be seen in some individuals just prior to attaining their full 

 size ; except in the larger size and deciduous bristles, he fails to note 

 any other difference between this species and H. Coxeni from 

 Queensland. 



The synonymy I do not vouch for ; it is as follows : 



If. prunum FER., Histoire iii, t. 26, f. 7, 8. DESH. in FER. Hist., 

 texte, p. 255. Cox, Mon. Austr. L. Sh., p. 43. TATE, Proc. Roy. 

 Soc. S. Austr. v, p. 49. H. argillacea GRAY, not Fer. H. pelodes 

 PFR. P. Z. S. 1845, p. 126. 



Brazier considers H. coxeni Cox (P. Z. S. 1871, p. 54, t. 3, f. 2) a 

 variety. It has been described and figured by Mr. Tryon in vol. 

 iii of the MANUAL, p. 216, pi. 50, fig. 30. 



H. BENNETTI Brazier. Unfigured. 



Shell umbilicated, depressedly globose, very thin, finely rugosely 

 striated and minutely granulated, dark-yellowish horny ; spire rather 

 conoid, obtuse; whorls 6, moderately convex, rapidly increasing, 

 last convex and inflated in front, slightly descending ; umbilicus 

 large, deep, and slanting ; aperture oblique, lunately ovate, interior 

 of aperture of a bright flesh tinge ; peristome simple, white, straight ; 

 margins approximating and joined by a thin callus, right margin 

 dilated, columellar margin broadly expanded and reflected, covering 

 one-third of the umbilicus. (Brazier.*) 



Alt. 10, greater diam. 16, lesser 13 mill. 



Ipswich, Queensland, inland 50 miles from Brisbane. 



H. (Hadra) Bennetti BRAZIER, P. Z. S. 1871, p. 639. 



I possess two specimens of this species, which approaches near to 

 H. prunum Fer., from Port Darwin and Port Essington ; also to H. 

 Greenhilli Cox, from the Dawson Biver. I have named it with 

 great pleasure in honor of Dr. George Bennett, F. L. S. whose inde- 

 fatigable exertions in the cause of science have made us acquainted 

 with many new and rare specimens of natural history from Australia 

 and the Polynesian Islands. (Brazier.*) 



