354 R. S. CLARK. 



In the latter species, orange-red pigment is already developed in specimens 

 of 4 mm. (on the abdominal region), while a distinct structural feature 

 of Capros post-larvse is the large number of small spines which cover 

 practically the whole surface of the fish, and appear more markedly 

 round the marginal outline. Two specimens were cleared and mounted. 

 Each had about 22 vertebrae. 



Fig. 3. Length 4 mm. 

 The maximum height, measured along a vertical just in front of the 

 first dorsal and anal fins, is 1-7 mm., and the distance from tip of snout to 



" »'fe^:*l^^...j.**>«*'#**«jfe 









Fig. 4. — Capros aper. Length 6 mm. Oitliona Station, CLII. A. 19th Sept., 1913. 

 Total depth 29 fms. Midwater haul. 

 Del. E. Ford. 



base of caudal fin is 3-2 mm. The longitudinal axis runs through the 

 middle of the eye. The angle of the snout is very nearly 90° — if anything 

 less : its length is about equal to the longitudinal diameter of the eye, 

 the contour of which is still incomplete. The rhomboidal form of the 

 fish is well marked. Small tooth-like spines are prominent on the snout, 

 chin, and profile of the head. The second dorsal and anal fin rays are 

 just beginning. Hypurals are developed on the caudal. The first dorsal 

 has the spiny rays moderately developed. As yet. the dorsal and anal 

 fins are both joined by a membrane to the caudal. The notochord is 

 straight. Dorsal and anal interspines are developed. The ventral fins 

 are well developed, and reach back almost to the beginning of the anal- 

 fin region. Number of vertebrse.ca. 22. 



