from West Australia and the Mauritius. 31 



my little Cape species H. Sabuletorum, ' Aunals/ vol. vii. p. 105 ; 

 but is at once distinguished by the absence of the distant plicse, 

 which, at intervals, graduate the striation in that species. 



These little shells, and the larger H. vorticialis of the Cape, 

 which has a concave spire like H. Juloidea, affect sandy mari- 

 time tracts of widely separated portions of the southern tem- 

 perate zone. 



Helix Australis, Menke, the Australian representative of the 

 littoral Helix Capensis of Southern Africa, is assigned to the 

 neighbourhood of Swan River. Dr. Bacon, an assiduous and 

 practised collector, has, however, failed to meet with it there, 

 although his attention was particularly directed to it. Bulimus 

 Melo, Quoy, was obtained by him near Freemantle, on sand- 

 banks within 20 yards of the sea ; and B. indutus, Menke, a 

 species not figured in 'Conchologia Iconica,' and there con- 

 founded with the American B. Tupacii, occurred to him, more 

 inland, in the vicinity of Perth, amongst limestone rocks and 

 bushes, together with an occasional example of B. bulla, Menke. 



5. Helix suffulta, nobis, n. s. 



Testa imperforata, turbinato-depressa, albida, supra radiatim minu- 

 tissime costulato-striata, striis subtus curvatis, mitioribus r spira 

 depresso-conoidea, apice obtusiusculo ; anfractibus 5^ arete convo- 

 lutis, ultimo rotundato ; apertura lunata, leviter obliqua, peri- 

 stomate expansiusculo, superne prope insertionem prorsum suban- 

 gulato, margine columellari subdilatato, reflexiusculo, intus dente 

 prominente ad finem exteriorem plicae obliquse site, munito, su- 

 perne periompbalum excavatum, umbilicum tingentem, penetrante. 



Diam. major 8, minor 7, axis 5 mill. 



Hub. in insula Mauritii. Teste Sir D. W. Barclay. 



This species is singular on account of the constriiction of the 

 aperture and base of the shell, which recall the structure of the 

 same parts in the Jamaican group which includes H Cookiana 

 and torrefacta. In this condition it is probable that the species 

 may have a coloured epidermis. It belongs to the toothed 

 insular group which includes H. Monodonta, Grat., a shell, 

 which cannot, as conjectured by Pfeiffer, be merged in his H. sty- 

 lodon; but a change of name becomes requisite on account of the 

 previous employment of the term by Lea. The following is a 

 more extended description of the shell than the brief characters 

 quoted from Grateloup by Pfeiffer. 



H. albidens, Bens. 



Testa imperforata, depressa, oblique radiato-striata, non nitente, 

 fusco-cornea, fascia castanea, inferiori pallida adnata, cinota ; spira 



