G. A. lìOULEXGEK 



parts wliite in front, pale brown, or barred brown and white, 

 furti ler back. 



Total length lO:) niillim.; tail 18. 



Eight specimens from tlie Cassine River District , Portuguese 

 Guinea. 



From A. miceUe)'i, Strauch, this species differs in the pentagonal 

 frontal forming a suture with the ocular, in the fusion of the 

 temporals with the corresponding labials and of the postfrontals 

 with the occipitals, and in the number of segments in an annulus 

 on the body (22 or 24 in A. muelleri); from A. leonina, F. 

 ]\Iull. , in the fusion of the temporals with the labials and of the 

 postfi'ontals with the occipitals, and in the number of segments in 

 an annulus on the body (24 in A, leonina). 



24, Amphisbaena bifrontalis, sp. n. 



Nasal, praefrontal, and praeocular fused with upper labials, as 

 in the preceding, but a pair of frontals, a little broader than long, 

 forming a suture with the small ocular and with a second upper 

 labial, and followed by a pair of postfrontals and a pair of small 

 occipitals; a third upper labial, separated from the frontal and 



Three aspects of head and anal region. 



postfi'ontal by a large temporal ; a short horizontal cleft in 

 front of the ocular; chin covered by a large elongate symphysial 

 but slightly narrowed and truncate behind , separating a pair of 

 very large low^er labials ; a small , square , second lower labial. 



