LIZARDS FROM THE MASOABENE ISLANDS. 



823 



bone. The junction between the two bones is very close, without 

 vacuity or foramen on the outer surface. The splenial consists 

 of two pieces, the anterior fitting into the deep inner notch of the 

 dentary, participating in the formation of the inner foramen ; the 

 posterior piece is small, and, barely touching the dentary, lies along 

 the lower side of the articular ; it terminates anteriorly in the 

 perpendicular from the coronoid process. The coronoid is small, 

 its process not quite vertical to the longitudinal axis of the man- 

 dible. 



The teeth were closely set, small, about 24 in number ; the an - 

 teriorwere probably conical and pointed, but the posterior, of which 

 several are preserved, have very obtuse summits. 



Shafts of three humeri have been preserved, one with the distal 

 end complete, and another with a portion of the proximal extre- 

 mity. This bone does not appear to differ from the type of other 

 Pleurodont lizards. It is about 39 millims. long, with a thin 

 and slightly compressed shaft, with the ulnar tuberosity dilated 

 and much projecting, and with the radial margin compressed into 



Fig. 2. 



Different aspects of (a, b, c) the imperfect humerus and (p, e, f) a perfect 

 femur of Bidosaurus maurifianus. All of natural dimensions. 



a sharp edge above the condyle ; the supracondylar foramen per- 

 forates this sharp edge, just above the condyle. The distal extre- 

 mity is 13| millims. broad. 



The specimens oi femur are nearly of the same length (46 mil- 

 lims.), but some have a somewhat stouter shaft than others. The 



