HELIX. 127 



Section II, EREMINA, Pfr. 1855. 



Desert snails of North-east Africa and Syria, with essentially the 

 same structure as Tachea, but, like all desert forms, thick, heavy 

 and calcareous. The jaw is slightly arcuate, with a few strong ribs 

 on its central portion. Teeth, as is usual in the Pentatsenia, lacking 

 side cusps ; central cusp long as the base. Erinna, Morch 1865 

 and Eremophila, Kobelt 1871, are synonyms. 



H. DESERTORUM, Forskal. PI. 35, figs. 19-23 ; PL 46, fig. 63. 



Subcovered umbilicate, rather thick, subglobose, depressed above, 

 tumid below, irregularly striate, chalky white unicolored, or with 

 zones or radiating streaks of reddish brown ; whorls 4J, the last 

 large, scarcely descending anteriorly, aperture widely lunate, sub- 

 angular below ; peristome simple, obtuse or somewhat expanded, di- 

 lated partially over umbilicus. Diam. 30 mill. 



Egypt, Syria, Palestine. 



H. maculosa, Born, H. rhodia, Chem., H. irregularis and If. ni- 

 cceensis, Fer., H. arabica, Roth., H. forskalii, Ehr., H. psammitus, 

 and H. gemmellarii, Arad. and Mag. are synonyms. 



Var. HASSELQUISTI, Ehrenb. PI. 36, fig. 24. 



White, inflated, irregularly rugose, striate, aperture dark within. 

 Var. HEMPRICHTII, Ehrenb. PI. 36, fig. 25. 



More inflated, mouth rounder, peristome expanded and much 

 thickened, double, continued beyond the expansion ; columella with 

 a shining white callus. The form called H. chilembia by Bourgui- 

 gnat represents the extreme development of this variety. 



H. DILLWYNIANA, Pfr. PI. 36, figs. 29-30. 



Umbilicate, depressed, solid, irregularly rugose, and lightly mal- 

 leate, chalky, shining, spire nearly flat, apex prominent, brown; 

 whorls 4, the last rounded, shortly deflexed in front, base inflated, 

 umbilicus narrow ; aperture very oblique, wide lunate, white within; 

 peristome acute, thickened within, reflexed at base. 



Diam. 31, alt. 14 mill. 



Habitat unknown. 



Said by Kobelt to be an abnormal H. desertorum. 



H. DESERTELLA, Jickeli. PI. 36, figs. 26-28. 



Covered perforate, depressed globose, solid, lightly striate, white, 

 unicolored or trifasciate, maculate above; spire depressed conic, 

 whorls 4J, inflated, rapidly increasing, the last rounded, descend! m 



