HELIX. 20 1 



to the turgid base, brown spotted and covering the umbilicus at its 

 insertion. Diam. 14-19, alt. 9-13 mill. Sicily, Tarento. 



H. frivaldskyi Calcara is synonymous. 



"Helix globularis forms a natural transition between muralis and 

 platychela; it is generally more elevated and globular than the 

 muralis, and has the peristome more expanded, whilst in the platy- 

 chela it is reflexed. The main difference from muralis lies in the 

 aperture, of which the basal margin appears more extended, callous, 

 provided with a fold or even a tooth, which is very rarely the case 

 with muralis" (Kobelt.) 



The species is variable in form, size and color, and sometimes very 

 difficult to separate from H. muralis. 



Var. CONSPICUA Benoit. PL 38, figs. 84, 85. 



Large, globose, marked with four maculose interrupted bands. 



Palermo. 

 Var. COSSURENSIS Benoit. 



Small, spire less elevated, ornamented with close wide macula- 

 tions. Pantellaria. 



Var. UNUULATA Kobelt. PI. 62, figs. 49, 50. Palermo. 



Var. ACHATINA Benoit. 



Whitish, without bands or maculations. Palermo. 



Var. TARENTINA Kobelt. PI. 62, figs. 51, 52. 



Whorls more planulate than in the type, and base of the aperture 

 not dentate. Tarento. 



H. MELITENSIS Ferussac. PI. 54, figs. 24-26. 



Imperforate, depressed-globose, more or less conoidal, solid, whit- 

 ish, or obscurely strigate or subfasciate with light brown, marked 

 with rather irregular oblique growth-lines and microscopic rather 

 distant spiral engraved lines, which are frequently subobsolete, and 

 usually wanting on the base; spire more or less depressed-conic, apex 

 obtuse; whorls 4 4=V, slightly convex, the upper ones obtusely sub- 

 angulate, the body- whorl convex, abruptly and deeply deflexed 

 anteriorly; aperture truncate-oval, very oblique, rather small, dark- 

 colored within; peristome expanded, white, the upper and lower 

 margins stibparallel, not converging, the basal callous and sub- 

 straightened, sometimes subdentate within, with a brown spot at its 

 insertion. Diam. 19-21, alt. 12-15 mill. 



Malta. 



