534 MR. H. B. TRISTRAM ON THE TERRESTRIAL [June 27, 
34, Hextrx vEsSTrAtis, Parr. 
Abundant in a few localities. 
35. Hexrx TUBERCULOSA, Conrad. 
Erroneously identified by Bourguinat with H. despreauxii from 
the Canaries. This is the most peculiar and interesting Helix in 
Palestine, and is found only sparingly in very restricted localities in 
the highlands west and south-west of the Dead Sea. 
36. HEeLix LEDERER], Pfr. 
In a few places on the coast, on sand-banks. 
37. Hewix seETZzENI, Koch. 
In immense numbers over the southern deserts, where it is the 
food of Sea-Gulls. 
38. Hextx arasica, Roth. 
Very scarce, and only south of the Dead Sea, taking the place of 
the preceding species. 
39. Hexrx canprpissimA, Drap. 
Very common. 
Var. hierochuntina, Boiss., granulated at the apex. 
Var. 3, extremely glossy, and less than one-third the size of African 
specimens. 
40. Hewix rimspriata, Bourg. 
Found in a few restricted localities north and west of the Dead 
Sea. 
41. Hexrx propHetTarvM, Bourg. 
Scattered in several localities west and south of the Dead Sea, near 
Sebbeh and Jebel Usdum. 
42. Heuix sorsstert, Charp. 
This fine example of a desert species, with its thick cretaceous 
shell, its solid contracted mouth and black interior, is widely dispersed 
in different localities over the Judeean desert, but not so generally 
as H. seetzent. 
43. Hexrx ritia, Mouss. 
This beautiful desert species has strong affinities both with H. 
prophetarum and H. boissieri. It is extremely scarce, and is found 
only in a few localities near the Dead Sea. 
44. Hexrx cariosa, Oliv. 
Extremely abundant in the mountain districts of Western Pales- 
tine ; not observed in the east. The three varieties, (1) amphicyrta, 
(2) nazarensis, (3) crassocarina, are easily recognizable. The third 
