SEPSIDA. 95 
each dividing into four toes, and the only species, S. sepsoides, 
inhabits Egypt and other parts of North Africa. Sphenocephatlus 
has a more slender and elongate shape, and the limbs are placed 
more distantly apart; the anterior minute, and fitting into a 
groove, the posterior as large as in Sphenops, and each of them 
having but three toes, of which the innermost and next are sub- 
equal, and the outer much shorter. The only known species, 
S. tridactylus (Fig. 24), is common in Afghanistan. In Sce/ofes the 
Fig. 24.—Seps tridactylus. 
anterior limbs disappear altogether; and the omy known species, 
S. dipes, inhabits South Africa. Other genera have a pyramidal 
head, with the rostral plate erect, and rounded in front. Such are 
the five following, each founded on a single species :—Gongylus 
ocellatus, from North Africa and the borders of the Mediterranean ; 
Thyrus Bogert, from the Mauritius; Amphielossus astrolabi, from 
Madagascar; Sess ¢ridactylus from the south of Europe and north 
of Africa; and Heteromeles mauritanicus, from North Africa. The 
last has only two toes to the fore-feet, three to the hind; and 
Seps has three toes to each foot, while the other three genera 
have five to each foot. In general these animals are found in dry 
and elevated spots, where they hide themselves in the sand or 
under stones. 
