216 HELIX. 



whorls 6, the last inflated, a little descending in front ; aperture 

 reddish, shining, lip white, shortly expanded. Diam. 30 mill. 



Australia. 

 H. argillacea, Gray and H. pelodes, Pfr. are synonyms. 



H. CAILLETI, Crosse. PI. 50, figs. 27, 28. 



Scarcely rimate, rather thick, rugulosely striate and very thinly 

 subgranose, dark chestnut color; whorls 6, convex, the last inflated, 

 obscurely angulated, descending in front, subcompressed round the 

 umbilical region; aperture pale violaceous, peristome same color, 

 shortly expanded and reflected. Diam. 32 mill. 



? Oceanica. 



The particular locality is unknown. 



Var. ft. Paler, greenish yellow, thinner, peristome whitish. 

 Diam. 28 mill. 



H. MABILLEI, Crosse. PI. 50, fig. 29. 



Narrowly umbilicated, rather thin, pellucid, rugosely striate, light 

 brownish ; whorls 5, convex, the last inflated, subangulated, descend- 

 ing in front, shining and greenish yellow on the base, subcompressed 

 around the umbilicus; aperture bluish, peristome white, dilated 

 above, margins joined by a shining callus. Diam. 24 mill. 



f Oceanica. 



Var. /?. Peristome violaceous, scarcely impinging on the umbilicus, 

 surrounded with chestnut color. 



Possibly this is identical with the preceding species. 



H. COXENI, Cox. PI. 50, fig. 30. 



Moderately umbilicated, rather thin, translucent, yellowish 

 brown, with undulating irregular striae and subrecurved hairs ; 

 whorls 5, the last rapidly increasing, inflated, a little descending 

 in front : lip expanded, its extremities joined by a thin callus. 



Diam. 24 mill. 



Whitsunday Isl. Queensland, Australia. 



H. PLICULOSA, Pfr. PL 50, fig. 31. 



Narrowly umbilicated, rather thin, closely plicate-striate above, 

 diaphanous, a little shining, reddish corneous ; whorls 4, periphery 

 subangulate, rounded and scarcely descending in front, base in- 

 flated, subcompressed around the umbilicus ; peristome whitish, 

 a little expanded. Diam. 16 mill. 



"Drayton Range" N. Australia- 



