1867. J DK. J. C. cox ON NEW AUSTRALIAN LAND-SHELLS. 725 



subtilissime granulata, coi'neo-hitescente ; sjnra convexa, ob- 

 tnsa, sutnra inediocri, tenuiter rufo tceniolata ; anfr. 5, lente 

 accrescentibus, convexiusculis, ultimo rotundo-convexo ; aper- 

 tiira limari-rotundata ; peristomate recto, tenui, marginibus 

 subco7iniventibus, columellari supra dilatato et fornicatim re- 

 flexo. 

 Diam. maj. 0*63, niiu. 0'57, alt. 0*30 unc. 



Hab. Clarence River, about South Grafton (under bark and logs) 

 {^MacGillivrai/). 



A thin horny semitransparent shell, like a starved miniature H. 

 yrayi, Pfr., and approaching next to //. avidorum, mihi, a much 

 more globose shell with an impressed suture. The reddish streak 

 along the suture is not always present. 



10. Helix pachystyloides, mihi. 



H. testa umbilicata, globosa, soUdula vel tenui, nitida, corneo- 

 lutescente, striis increinenti levibus, rugatis, confer tissime rugis 

 irregidaribus decussata ; spira brevi, obtusa, sutura crenulatu ; 

 anfr. 5, co7ivexis, celeriter accrescentibus, ultimo permagno, in- 

 flato ; apertura fere diagonali, rotundato-lunata ; peristomate 

 extusjlavo, intus pallide cameo (interdum albido), recto, tenuiter 

 expanse, marginibus subconniventibus et callo tenui junctis, 

 hasali exjjansiore, columellari supra dilatato, intus subcalloso, 

 exferne umbilicum profunduni semioccultante. 



Diam. maj. 1"20, min. 1, alt. 0"85 unc. 



Hab. Cape York {Darnel). 



This varies considerably in solidity, being sometimes even a deli- 

 cate thin and horny shell, then most nearly allied to the very small 

 but exurabilicated variety of H. pachystyla. 



11. Helix mucosa, mihi. 



H. testa umbilicata, depresso-orbiculari, subdiscoidea, irregula- 

 riter et conferte rugoso-striata, solidiuscula, oleoso-micante ; 

 spira latissime conoidea, apice submersa ; anfr. A\ lente accres- 

 centibus, convexiusculis, ultimo subito antice defiexo, obsolete 

 carinato, basi convexo, rugoso-strigato ut supra, sed levius ; 

 iimbilico perspectivo, fere ^ diametri aquante ; apertura ro- 

 tundo-lunari ; peristomate simplici, recto, marginibus subcon- 

 niventibus, columellari supra valde expanse et rejtexo. 



Diam. maj. 0-30, min. 025, alt. 0*14 unc. 



?Iab. Clarence River (MacGillivrag) . 



Belonging to the section Discus, but not closely approaching any 

 species known to me. I hope the name mucosa will stand, although 

 there is already a mucida. 



12. Helix pexa, mihi. 



H. testa umbilicata, depressa, fere discoidea, tenui, translucente, 

 regulariter et conferte arcuate-costata, costis apparentibus ut 

 binis coalescentibus, interstitiis non (sub lente) striatis, pallide 

 lutescenti-cornea ; spira plana, sutura mediocri ; anfr. 4, con- 



