3. A.Mrni8B,EN'A. 447 



IIJ. Amphisbaena quadrifrons. 



Cynisca quadrifrons, Oruy, Cat. Sh. Rept. ii. p. 30. 

 Amphisljaena quadrifrons, Peters, Man. Berk Ac. 1862, p. 25, and 

 lyZi), p. 277, pi. — . fig. 4 ; Strcmch, Mel. Biol. Ac. St. Petersb. xi. 

 p. 412. 



Snout rounded, prominent. Rostral triangular, its point visible 

 from above ; nasals forming a suture, four elongate pra;frontals, on 

 a curved transverse lino ; a pair of frontals followed by a pair of 

 small occipitals ; eye distinct through the ocular, which forms a 

 suture with the second and third labials ; two large temporals ; 

 four upper labials, third largest ; mental trapezoid, followed by a 

 larger seven-sided chin-shield ; four lower labials, second largest, 

 fourth very small ; a large chin-shield behind the second lower 

 labial. Two hundred and twenty-six to two hundred and thirty- 

 seven annuli on the body, forty-eight on the tail. Four anal seg- 

 ments. Four pr?eanal pores. 



Hereroland, S.W. Africa. 



20. AmpMsbaena kraussi. 



Ampliishfena kraussi, Peters, Sitzb. Ges. Kat. Fr. 1878, p. 192, arid 

 Mon. Bcrl. Ac. 1878, p. 731, pi. — . fig. 5. 



Allied to A. leucura. Eostral higher than broad, pointed above ; 

 nasals half as long as prsefrontals ; a very small median frontal; a 

 pair of frontals, forming a point ])osteriorly, wedged in between two 

 large postfrontals, wliich are followed by a pair of occipitals ; a 

 prseocular, separating the ocular from the nasal ; three upper labials, 

 third largest, followed by a very large temporal, which is the largest 

 of all the head-shields ; an elongate mental and two lower labials, 

 the anterior of which is very large, the second very small. Six 

 anal segments ; eight praeanal pores. 



West Africa. 



21. Amphisbaena leucura. 



CjTiisca leucura, Gray, Cat. Tort. p. 71, 

 and Sh. Pept. ii. p. 30. 

 Amphisbnena leucura, Dum. 4' Bibr. v. p. 498 ; Peters, Mon. Berl. 

 Ac. 1879, p. 277, pi. — . fig. 5 ; Strauch, Mel. Biol. Ac. St. Petersb. 

 xi. p. 388. 



Pnemaxillary teeth 5, maxillaries 4-4, mandibulars 7-7. Snout 

 rounded, prominent, llostral small, triangular ; nasal and prae- 

 frontal on each side united, forming a long suture on the upper 

 surface of the snout; a median pentagonal frontal, between the 

 supraoculars ; a pair of postfrontals followed by a pair of occipitals; 

 three large i.emporals ; ocular a little larger than supraocular ; eye 

 slightly distinct ; a prfcocular, broader than deep ; three upper 

 labials, third largest; mental elongate, narrow, trapezoid; two 

 lower labials, first extremely large, second small ; a small chin-shield 

 on each side, forming a suture with the two lower labials. Two 



