BY C. HKDLEY. 255 



Gray, and P. larreyi Brazier. The discovery of another species 

 is the most important feature of Mr. S. W. Jackson's collection. 



In this species, the genus reaches its most northern extension. 

 In colour and texture it recalls F. larreyi, but from that, as from 

 the others, it dilfers greatly by the auriculate form, few whorls, 

 low spire and large aperture. In these respects, it curiously 

 approaches Helicophanta. The novelty is the smallest of the 

 genus. 



At Mr. Jackson's wish, this interesting species is named in 

 honour of Mr. Henry L. White, of Belltrees, near Scone, N. S. 

 Wales, the well known ornithologist. 



Thersites dunkiensis Forbes. 



Helix dunkiensis Forbes, Voy. Rattlesnake, ii., 185l', p. 378, Pl.ii., 



f.7a, b. 

 Helix coxence Brazier, Proc. Zool. Soc, 1875, p. 32, Pl.iv., f.5. 

 Helix nicornede Brazier, Proc. Linn. Soc. N. S. Wales, iii., 1878, 



p.79, Pl.viii., f.6. 



(Plate iv., figs. 5, 6, 7, 8.) 



The types of Brazier's two species are in the Australian 

 Museum; their author admitted to me that both should be sub- 

 ordinated to T. dunkiensis. Hitherto this species has only been 

 recorded from the coast and islands of Rockingham Bay. Mr. 

 Jackson has extended its range inland, by finding it (1) on the 

 Herberton Range, at a height of nearly 4,000 feet, alive under 

 stones in forest, and often burrowing 2 and 3 inches into the dry 

 ground, November, 1908; (2) between Tolga and Rocky Creek, 

 south-west of Cairns, at a height of 2,360 feet, in dry forest- 

 country, alive under logs on stony ground, in company with X. 

 pachystyla, December, 1908; (3) the Tinaroo forests from whence 

 came the specimen here figured. 



A harsh surface of grains and wrinkles constitutes a recogni- 

 tion-mark for this species. But this superficial sculpture varies 

 considerably, the inland shells taken by Mr. Jackson being 

 rougher than those from the coast. A corresponding but fainter 

 sculpture occurs in T. bipartita Deshayes, and its variety, 2\ 



