﻿30 The Philippine Journal of Science 1914 



into the articular (4) posteriorly, and articulate with each 

 other in front. There is a deep fossa extending anteriorly 

 into the dentaries, opening toward the inside posteriorly, into 

 which the outer longer portion of the articular (4) extends. 

 There is also a canal on the inside of the furrow, leaving two 

 openings anteriorly, one on the ventral side and the other 

 forward on the outside. 



There is a single row of large conical teeth extending for a 

 part of the length of the dentaries but not continuing either 

 entirely anteriorly or posteriorly, while posterior to these large 

 teeth are some smaller conical teeth. Anteriorly is a mass of 

 cardiform teeth. Also on the outside of the large teeth is a 

 row of the very small conical teeth, and some of them have 

 still smaller teeth at their bases on the inside. (Plate I and 

 Plate IX.) 



The articulars (4) articulate anteriorly with the dentaries 

 (3) and with the quadrates (7) and with the angulars (12) 

 posteriorly. They form an obtuse angle at the outer lower mar- 

 gin, with a high dorsal process at the outer posterior part. 

 Anteriorly are two processes, the outer being the longer and 

 sharper. These two articulate with the dentary (3), the outer 

 and longer process extending into the fossa of the dentary (3) 

 and the other lying along the inside of the dentary (3). The 

 sensory canal in the dentaries (3) is continuous with a similar 

 canal in the articulars. In the depression continuous with that 

 formed by the union of the two anterior processes is a small 

 scale-like bone, the intra-articular (86). (Plates I and IX.) 



The maxillaries (5) extend inside the suborbitals (18) just 

 above the premaxillaries (1), articulating with them anteriorly 

 and posteriorly, and the dorsal process fits in between the dorsal 

 processes of the premaxillaries (1) and the anterior processes of 

 the palatines (2). Posteriorly they extend as far as the pos- 

 terior end of the articulars (4) and the dorsal angle of the 

 quadrates (7). The dorsal view of the left is shown in Plate 

 IX, as is also the ventral view of the right, and in Plate I the 

 left is displayed. 



The angulars (12) articulate closely with the posterior inner 

 end of the articulars (4) and with the interopercles (40) pos- 

 teriorly. The dorsal side of the left is shown disarticulated 

 from the articular (4) and the right still articulated. (Plate 

 IX.) 



These "intra-articulars" (86) lie in the angle of the articulars 

 (4). In Plate VI that of the right side is seen detached, from 



