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 Pentateenia, lacking 

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

 and Eremophila, Kobelt 1871, are synonyms. 



H. DESERTOKUM, 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 4, 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, Bora, H. rhodia, Chem., H. irregularis and H. ni- 

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

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



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



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

 Var. HEMPRICHTII, Ehrenb. PL 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. DTLLWYNIANA, Pfr. PL 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. PL 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, descending 



