﻿40 



The Philippine Journal of Science 



1914 



ceratobranchials (63) of the first branchial arch. In Plate 

 XIII the exterior side of the bones is shown at the right and 

 left sides. They are also seen from the dorsal side in Plate XV. 



In Plate XIII the anterior side of the interhyals (21) lies in 

 view. The condyle of the ventral end is larger than that of 

 the dorsal end, and articulates with the glenoid fossa of the 

 epihyals (20). The epicondyle, which here lies below, in its 

 natural position is toward the interior. That of the left side 

 is indistinctly seen in Plate XV. 



The branchiostegals (22) are seen from the exterior and are 

 curved as shown in Plate XIII. The anterior two articulate 

 with the ceratohyals (19), the 3d lies over the V-shaped in- 



FlG. 3. Hypohyals (84), ceratohyals (19), epihyals (20), and branchiostegal rays (22). 

 "Teeth" are found on some of the rays. Natural sire. 



terval between the ceratohyals (19) and the epihyals (20), and 

 the 4th and 5th articulate with the epihyals (20). They lie 

 opposite the inner surfaces of the interopercles (40), the sub- 

 opercles (13), and the opercles (14) . In one specimen examined, 

 the 2d and 3d branchiostegals on the right side are seen to 

 be notched or toothed as shown in text fig. 3. and on the left 

 side the third is of like structure. In Plate XI the branchios- 

 tegals are in position, and the extended epibranchials (64) and 

 superior pharyngeals (23) are underneath the posterior ends. 

 Plate VI, fig. 1, shows those of the left side from the interior. 

 From the ventral side the urohyal (68) presents a flat, some- 

 what oval surface, with a posterior spinous portion. However, 



