HELIX. 



Group IV. MACROCYCLIS, Beck, 1837. 

 Shell large, rather solid, widely umbilicated, depressed, the last 

 whorl declining towards the aperture ; aperture round-oval, peri- 

 stome simple, the extremities approaching, and the lower somewhat 

 reflected. H. LAXATA, Fer. Chili. 



Section GLYPTOSTOMA, Bland and Binney, 1873. 



Widely umbilicated, depressed, rather solid, rugosely striate; 

 whorls 6, the last depressed-globose, not deflected at the aperture * 

 aperture obliquely subcircular, peristome simple, acute, thickened 

 within, its extremities approaching, columellar lip scarcely 

 reflected. H. NEWBERRYANA, W. G. Binney. 



California* 



Group IV. MACROCYCLIS, Beck, 1837. 

 H. LAXATA, Fer. PI. 21, figs. 100-2. 



Widely umbilicated, thin, very closely rugulose-striate, fulvous- 

 brown, the base shining fulvous-green, decussated by very minute 

 spiral lines ; whorls 4^-5, slightly convex, rapidly enlarging, the 

 last wide, depressed, descending in front ; aperture pearly. 



Diam. 45 mill. 



Chili. 



H. Peruviana, Lam., H. Deshayesii, Anton, and H. dndnnus* 

 Reeve, are synonyms. 

 Var. BANKSII, Cuming. Figs, 1, 2. 



Larger : diam. 60 mill. 



This is var. maxima of Pfr. The juv. is H. umbilicata, Anton. 

 The unfigured If. Gayi, Hupe, may also be a juvenile, as surmised 

 by Philippi. 



*** 



The following Australian species are included by Pfeiffer : their 

 pertinence is questionable. 

 H. FRANKLANDIENSIS, Forbes. PI. 21, fig. 3. 



Rather widely, conically umbilicated, somewhat solid, distinctly 

 arcuately striated, very shining, fulvous yellow, with some irregular 

 deeper stripes ; whorls nearly 5, somewhat flattened, the last a little 

 dilated, subdepressed, not descending ; aperture pearly. 



Diam. 26 mill. 



Lizard Is., Australia. 

 H. HARRIETTS, Cox. PL 21, figs. 4, 5. 



Rather widely umbilicated, thin, light yellowish brown, with 

 irregular dark strigations, roughly striated above, smooth below ; 





