﻿52 The Philippine Journal of Science i»u 



Plate IV 



Fig. 1. Posterior portion of disarticulated skull. The left side of the figure 

 is anterior. 

 35, supraoccipital, from the dorsal side. 

 69, basioccipital, from the dorsal side. 

 72, exoccipitals, from the dorsal side. 

 79, epiotics, left from ventral side and right from dorsal. 

 123, opisthotics, left from ventral side and right from dorsal. 

 2. Top of skull from right side. 



36, frontal. 72, exoccipital. 



38, pterotic. 76, prefrontal. 



39, sphenotic. 78, prootic. 



66, parasphenoid. 79, epiotic. 



67, vomer. 83, basisphenoid. 

 69, basioccipital. 



Plate V 



Fig. 1. Ventral side of top of skull. 



35, supraoccipital. 72, exoccipital. 



36, frontal. 76, prefrontal. 



38, pterotic. 78, prootic. 



39, sphenotic. 79, epiotic. 



66, parasphenoid. 83, basisphenoid. 



67, vomer. 122, alisphenoid. 

 69, basioccipital. 123, opisthotic. 



2. Posterior view of top of skull. 



35, supraoccipital. 72, exoccipital. 

 38, pterotic. 79, epiotic. 



69, basioccipital. 123, opisthotic. 



Plate VI 



Fig. 1. Right side of skull with suspensorium and jaws removed. 

 1, premaxillary. 65, glossohyal. 



13, suboperculum. 66, parasphenoid. 



14, operculum. 67, vomer. 

 16, nasal. 68, urohyal. 

 22, branchiostegals. 70, atlas. 



25, lower or inferior pha- 72, exoccipital. 



ryngeals. 74, epibranchial, modified of 1st 



26, supratemporal. branchial arch. 



27, posttemporal. 76, prefrontal. 



36, frontal. 78, prootic. 



38, pterotic. 84, hypohyal. 



39, sphenotic. 123, opisthotic. 



40, interoperculum. 133, patches of cardiform teeth. 

 2. Orbitals. 



18' to 18", suborbitals; 18 3 , of top row from the posterior side. 

 18*, preorbital from outside. 



