492 Dr. Richardson's Contributions to 



more or less divided at their tips. The fourth and fifth are the tall- 

 est, and form the anterior tip of the fin. The bases of the rays are 

 covered by a scaly fillet, which runs to a point posteriorly and rises a 

 little from the back. The ventrals stand opposite to the middle of the 

 dorsal, or midway between the mouth and tips of the central caudal 

 rays. There are eleven rays, the outer one being strong, flat and 

 bony, but divided at the tip, the others becoming gradually smaller 

 as they are more and more interior. There is a long acute scale 

 above the fin, and a scaly plate between the fins. The anal is small, 

 with a wide notch in its edge, and is composed of eleven rays, in- 

 cluding three short, graduated, incumbent ones. A scaly fillet rising 

 obliquely from the base of the anterior rays nearly covers the poste- 

 rior half of the fin. The caudal fin is very deeply forked, its acute 

 and widely separated lobes being five times the length of the central 

 rays. The divergence of the points exceeds the height of the body, 

 and nearly equals the distance between the tips of the dorsal and 

 ventrals ; it consists of nineteen rays, with nine shorter, graduated, 

 incumbent ones above and eight below. The exterior simple ray 

 which reaches to the point of the lobe above and below is broad 

 and bony, and is crossed at regular distances by oblique lines, which 

 are nearly obsolete on the bases of the more interior branched rays, 

 and are less conspicuous on the exterior short incumbent ones. 



There are no distinct traces of colour remaining, except some dark 

 shades along the back. The sides and belly have a bright silvery 

 lustre, and the sides of the head a somewhat golden hue. 



Dimensions. inches. lines. 



Length from intermaxillary to tip of upper lobe of caudal.... 19 



■ tips of central rays 15 1 



base of ditto 14 6 



• beginning of anal 11 6 



■ ventrals 8 



«— — dorsal 7 5 



< pectorals 3 5 



* tip of gill-cover 3 3 



Length of orbit 11 



Distance between angle of orbit and orifice of mouth 7 



Height of body 4 



dorsalfin 2 7 



Length of ditto 2 2 



pectoral rays 2 2 



ventral rays , 1 8 



anal fin 1 5 



Depth of ditto 9| 



Length of caudal lobes 5 6 



Divergence of points of ditto 5 6 



Depth of caudal fork 3 G 



Obs. This subgenus and many of the other species described in 

 this paper have already been named by me in a Report on the Ich- 

 thyology of New Zealand, read at the Meeting of the British Asso- 

 ciation in June 1842, and in the Appendix to Dr. DiefTenbach's ac- 

 count of New Zealand. 



