62 



LAND AND FRESH 

 MOLLUSCA. 



WATER 



By W T. BEDNALL, 



Hon. Curator for Conchology, Public Museum, Adelaide. 



[Plate I.] 



The number of species collected is seven — one fresli-water and 

 six land-shells — namely, Bulinus (one), HeIix(ionT), Bulinms (two). 

 The number of living specimens obtained was fairly large, when 

 the excessive drought which prevailed throughout the journey of 

 the party is taken into consideration. The species of Jiulinus, 

 the only fresh-water-shell taken, occurred in a waterhole at a 

 locality at whicli the party camped at the very commencement of 

 the Expedition, is one that is widely distributed throughout the 

 province of South Australia. Of the four lleliceg procured one 

 proved to lie identical with a species discovered by Professor Tate 

 at Waukaringa some years ago, whose description of it is included 

 in this paper. Anotlier is Helix perinfiata, described many years 

 ago , but still a scarce shell in collections ; while the remaining 

 two are new species. The two species of Bnlimi are both well- 

 known West Australian forms. 



Helix (Galaxias) pekinflata, J'/r. 

 Pro. Xool. Soc, ] 863 ; Cox, Monograpli Austi-alian Land Shells. 

 (PI. I, hg. 6.) 

 This shell was first obtaijied by Sir. P. G. Waterhouse in the 

 MacDonnell Ranges, Central Australia, when accompanying 

 John Macdougall Stuart in his exploration across the continent, 

 and was described by Pfeifl'er in 1863 from the specimens there 

 procured. It was the prevailing species collected by Mr. Helms, 

 and specimens were taken from Mount lUbillee on the Everard 

 Range, westward to the Victoria Desert. Those taken at the 

 conmiencement of the journey answer most closely to the desciip 

 tion transferred by Dr. Cox to his Monograph of the Land 

 Shells of Australia. A featur'e of these particular speci- 

 mens is that some of them are encircled with a somewhat broad 

 rufous band just above the periphery, which in very many of the 

 examples has a tendency to spread towards tlie suture. In 

 others again there is not the slightest semblance of the band of 

 colour, and it is evidently specimens of this type that were sub- 

 mitted to Dr. Pfeitt'er, as he makes no mention of this character. 



