LARVAL AND POST-LARVAL TELEOSTEANS. 351 



joined to tlie caudal by a continuance of their fin membranes. The rays 

 of the first dorsal are indistinctly marked. Dorsal and anal interspines 

 are clearly developed, but the fin rays are merely indicated. The 

 ventrals are six-rayed, third largest and sixth shortest. They reach to 

 the middle of the anal fin. 



Fig. 1. — Zens faber. Length 4 '5 mm. Oithona Station, CXVIII. A. 5tli Sept., 

 1913. Total depth 37 fms. Midwater haul. 

 Del. E. Ford. 



The whole surface of the body is covered with large black stellate 

 chromatophores on a greenish background. These are intermingled 

 with smaller chromatophores. The head is not so densely pigmented 

 and the interspaces between the chromatophores are larger. The ventral 

 fins are densely pigmented with numerous large closely set chromato- 

 phores, giving the fins almost a black appearance. The pigment on the 

 first dorsal fin is also evenly distributed, at least on the anterior half. 

 No pigment occurs on the second dorsal, anal, and caudal fins. 



Fig. 2. Length 6 mm. 



The maximum height is 3-004 mm. and the distance to the caudal 

 4-78 mm. (to end of body pigment). The highest point of the body is 

 just in front of the first dorsal fin. The angle of the snout is slightly 

 obtuse, and its length about equal to the diameter of the eye, the contour 

 of which is still incompletely defined. The notochord is still straight or 

 perhaps with a very slight upward tendency, caused by the hypural 

 rays of the caudal being more developed. The unpaired fins are now 

 separated from the caudal-fin membrane, and their rays are clearly, 

 though not fully, defined. 



The body pigment has spread on to the base of the dorsal and anal 



