S5IITH : ArSTRALIAN LAND-SHELLS. 89 



Helix (Rhagada) leptogeamma, Pfeiffer. B.M. 



Pilsbry, in Tryon's Man. Conch, ser. II. vol. vi. p. 186. 



Hah. — Cygnet Bay, King Sound, N.W. Australia (Pfr.) ; Roebuck 

 Bay, South of King Sound (Walker). 



Mr. Walker obtained only a single small dead specimen, but this 

 is quite sufficient to confirm the original locality assigned to this 

 species. 



Helix (Rhagada) Reinga (Gray), Pfeiffer. B.M. 



Helix {Rhagada) Reinga, Pilsbry, T.c. p. 185. 



Hah. — Port Essington and Dampier Archipelago (Brit. Mus.) ; 

 Roebuck Bay (J. J. Walker) ; Burner Ranges, east of King Sound 

 (Cox). 



It seems to me probable that the H. torulus, Per., is identical with 

 this species. It was collected by Peron during one of the early 

 French voyages, but the exact part of Australia where he obtained it 

 is not stated. A specimen from Burner Ranges presented to the 

 British Museum (Natural History) by Dr. J. C. Cox is rather flatter 

 than most specimens, and somewhat more finely sculptured. 



Helix (Rhagada) Richaedsonti, Smith. B.M. 



Pilsbry, T.c. p. 185. 



Hab. — Depuch's Island, somewhat to the north-east of Cossack 

 (Brit. Mus.). 



H. elackystoma, Martens (Pilsbry, p. 187), is evidently identical 

 with this species. It was described from specimens from Mermaid 

 Strait, situated a little to the west of Cossack. 



Helix (Rhagada) convicta, Cox. B.M. 



Pilsbry, T.c.^. 187. 



Hah. — Mchol Bay (Cox) ; Mermaid Strait (Martens) ; Cossack and 

 Bezout Island (J. J. Walker). 



This species is larger than either H. Reinga or H. Richardsonii, which 

 occur in the same part of West Australia. It is rather solid, and 

 never appears to have more than the one pellucid zone just above the 

 periphery. On the contrary, the bands in the two other species 

 referred to are coloured, and the supra-peripherial one is much broader 

 and darker than the rest, which are more or less variable in number. 



Helix (Rhagada) tescoeum, BensoN. B.M. 



Pilsbry, T.c. p. 187. 



Hab. — Shark's Bay, West Australia (Benson). 



In form and size this species is very like H convicta ; it is, however, 

 remarkable for the caniculate suture.^ Only a few dead and much 



' It is within the range of possibility that this feature may be due to weathering. 

 If, in reality, such be the case, this species should undoubtedly be united with 

 S. convicta. 



