560 M. G. A. BOULENGER ON THE [NoV. 16, 



entire edges ; sometimes they leave between them a little lozenge- 

 shaped space, in which the upper plate of the ethmoid remains 

 uncovered. The zygomatic apophysis of the temporomastoidians is 

 very short. 



The length of the vertebral column to the base of coccyx equals 

 hardly once and a half that of the skull in both sexes. The dia- 

 pophyses of the eighth vertebra are strongly directed forwards ; 

 those of the sacral are very dilated, as high as broad. The coccyx, 

 which sometimes presents traces of diapophysis at its base, is longer 

 than the skull, measuring the length of the first eight vertebrae. 



In the males the rudiment of a thumb is rather developed. 



Geographical Distribution. — Bufo mauritanicus inhabits only the 

 Palsearctic part of Africa. It has been found in Tunis, in Algiers 

 (where it is very abundant), and in Morocco. 



5. Bufo regularis, Reuss. 



Grenouille ponctuee, Geoffroy, Descr. Egypte, Rept.pl. 4.f. 1 & 2 

 (1809). 



Bufo regularis, Reuss, Mus. Senckenb. i. p. 60 (1834). 



Bufo pantherinus, part., Dumeril and Bibron, Erp. Gen. viii. 

 p. 687 (1841); Giinther, Cat. Batr. Sal. p. 59 (1858). 



Bufo cinereus, Hallowell, Proc. Ac. N. S. Philad. ii, p. 169 

 (1850). 



Bufo maculatus, Hallowell, I. c. vii. p. 101 (1854). 



Rana mosaica, Seetzen, Reise Syr. Palast. iii. p. 492 (1855). 



Bufo guineensis, Giinther, Cat. p. 59 (1858). 



Bufo spinosus, Barboza du Bocage, Proc. Zool. Soc. Lond. 1868, 

 p. 845. 



Bufo pantherinus,, Boie, MS. 



Bufo nubicus, Fitzinger, MS. 



Characters. — Crown of the head without bony ridges. Snout 

 short, rather blunt. Interorbital space rather broad. Tympanum 

 large, ovate, very distinct. Parotoids elliptic, more or less elongate, 

 more or less prominent. Fingers moderate, with simple subarticular 

 tubercles, first much longer than second. Hind limbs moderate, no 

 large gland on the calf; a cutaneous fold along the inner edge of 

 the tarsus ; toes moderate, one third webbed, with simple sub- 

 articular tubercles. Upper parts with irregular, depressed, in- 

 distinctly porous warts. Above uniform or variously spotted ; 

 sometimes a yellowish vertebral line. Beneath immaculate or with 

 large burnt-like spots. Male, with a little-developed subgular vocal 

 sac. 



