BUFO. 219 



Skeleton, — Skull strongly ossified. Ethmoid en- 

 tirely or nearly entirely covered over by the fronto- 

 parietals and the large, subtriangular or pear-shaped 

 nasals, the two paired bones being in contact with 

 each other, and forming a continuous or subcontinuous 

 median suture. Squamosal forming a suture with 

 the prootic, its zygomatic process very short. Of the 

 three branches of the pterygoid, the anterior is the 

 longest and the broadest, and joins the maxillary and 

 the palatine ; the inner branch extends to the para- 

 sphenoid, whicli is dagger-shaped, obtuse or truncated 

 anteriorly, and in contact with the palatines. Latter 

 bones strong, with sharp lower keel. Vomers very 

 small, widely separated from each other. Mento- 

 Meckelian bones distinct. 



Hyoid much longer than broad, with moderately 

 broad cornua without anterior processes, small alas, 

 short postero-lateral processes, and slender, diverging, 

 ossified thyroid processes, which are narrowly 

 separated from each other at the base. In old 

 specimens a small ossification is present on each side 

 of the body of the hyoid, just behind the level of the 

 anterior notch. 



Diapophyses of second vertebra much flattened and 

 directed forwards ; of third vertebra also much 

 flattened, longer, and horizontal ; of fourth a little 

 longer still, less flattened, and directed backwards. The 

 four following diapophyses slender and subcylindrical, 

 gradually decreasing in length to the last or the last but 

 one, the first two directed backwards, the other two 

 horizontal. Diapophyses of sacral vertebra dilated, 

 subtriangular, their distal diameter equal to or a 

 little less than their length. Two condyles for articu- 

 lation with the urostyle. Latter nearly as long as 

 or shorter than the rest of the vertebral column, a 

 little longer than the skull, with strong dorsal crest, 

 but no processes at the base save exceptionally. 



Prascoracoids strong, feebly curved, nearly hori- 

 zontal, entering the glenoid cavity ; coracoids slightly 



