﻿38 The Philippine Journal of Science nu 



I illustrates it still articulated, while Plate XII, fig. 1, represents 

 it detached. 



Rays of caudal fin No. 54 articulate with the posterior ends 

 of the hypurals (53) clasping around them and on the dorsal 

 side with the neural spines (51) of the 2 vertebrae immediately 

 preceding the hypural vertebra (34). On the ventral side they 

 articulate with the haemal spines (52) of 3 caudal vertebrae 

 immediately preceding the hypural vertebra (34). (Plate I.) 

 No. 55 is used in Plate I to indicate the caudal rays at the dorsal 

 side. These are short, those in the median region being the 

 longest, the fin being homocercal. 



RIBS 



Articulated with the atlas and axis is a pair of single ribs. 

 Posterior to these are about 15 pairs of double ribs, while pos- 

 terior to these there is a pair of single ribs articulated with each 

 of the vertebrae except the last 5 in the caudal region. In the 

 last 4 pairs of double ribs the more dorsal is articulated to the 

 transverse process, not at the place with the ventral, but slightly 

 proximally, and so may be designated epipleurals. The last 3 

 double ribs in Plate I show this condition. 



Rib 48 is in the anterior abdominal region in Plate I. 



Rib 50 is attached to the 28th vertebra as shown in Plate I. 



Rib 56 is in the posterior abdominal region, and is articulated 

 with the 38th vertebra. (Plate I.) 



Ribs 59 are the ventral of the first 3 double ribs, those of the 

 right side lying above. They are articulated with the 3d, 4th, 

 and 5th vertebrae, respectively. 



Ribs 61 are the dorsal of the first 3 double ribs. These are 

 articulated with the 3d, 4th, and 5th vertebrae. (Plate XII, 

 fig. 2.) 



The 13th upper double rib (104). All of these ribs at the 

 bottom are of the left side of the body, and those at the top 

 of the right side. Plate XII, fig. 2. 



The 13th lower double rib (105) is seen in Plate XII, fig. 2. 



The 14th upper double rib (106) is seen in Plate XII, fig. 2. 



The 14th lower double rib (107). Anteriorly to this point, 

 the dorsal ribs have been the longer. (Plate XII, fig. 2.) 



The 15th upper double rib (108). Here the lower instead 

 of the upper double rib is the longer. (Plate XII, fig. 2.) 



The 15th lower double rib (109) is in Plate XII. fig. 2. 



The 25th rib (110) of the trunk is a single rib, and is il- 

 lustrated in Plate XII, fig. 2. 



