﻿20 The Philippine Journal of Science 1914 



Plate I is taken from the left side of the whole skeleton of 

 a fish 49.5 centimeters long. The numbers used in this plate 

 to mark the bones are the same as are used in the individual 

 descriptions throughout the paper. 



I. THE SKULL AND ORBITALS 

 PLATES I, II, III, IV, AND V, AND PLATE VI, FIG. 1 



The nasals (16) are somewhat rectangular, rather flat bones, 

 with curved edges. Sensory canals pass from posteriorly ante- 

 riorly from the frontals (36) opening on the dorsal side a short 

 distance from the anterior end. They articulate posteriorly 

 with the frontals (36) and prefrontals (76), with the orbital 

 (18 6 ) outside, with the ethmoid (81) and supraethmoid (75) 

 inside, with each other in front, and with the premaxillaries 

 (1) below and anteriorly. Their curved interior sides form 

 an opening through which project the dorsal side of the ethmoid 

 (81) and the dorsal processes of the premaxillaries (1). (Plates 

 I and II.) 



The supratemporals (26) are somewhat right-triangular with 

 the outward right angle slightly rounded off. They are per- 

 forated throughout the whole length by sensory canals. They 

 lie above the articulation of the pterotics (38) and epiotics 

 (79), and articulate with the parietals (37) anteriorly, while 

 the posterior portion articulates with the base of the short 

 spine of the posttemporals (27). (Plate II.) 



The posttemporals (27) have a comparatively large oval body 

 posteriorly, and anteriorly are widely forked, the larger branch, 

 inside, articulating with the epiotics (79) and the shorter with 

 the process of the pterotics (38). The posterior oval portion 

 covers a part of the space between the opercles (14) and the 

 epiotics (79). (Plates I and II.) 



The supraoccipital (35) is situated between the parietals 

 (37), about half of the upper surface extending anterior to 

 them, and to which they are joined by broad flat condyles. 

 The V-shaped anterior end is articulated with the frontals 

 (36). Posteriorly it is joined to the exoccipitals (72) and 

 the epiotics (79). Below it is joined to the prootics (78). 

 The wide flat lateral processes form a part of the roof of 

 the accessory branchial chamber. (Plate II; Plate IV, fig. 1; 

 Plate V, fig. 1.) 



The frontals (36) are somewhat rectangular, and twice as 

 long as broad. They are extensively tunneled by sensory canals. 

 The ventral side has an oblique ridge for articulation with 



