144 PROCEEDINGS OP THE ACADEMY OP 



duncle ; the preanal region is nearly horizontal, but behind is nearly recti- 

 linear and slowly trends upwards to the caudal. The height of the caudal 

 peduncle equals a tenth (*10) of the total length. 



The head is scarcely longer than high, and curved from the dorsal to the 

 eyes ; it is laterally rhomboid, the profile in front of the eyes descending down- 

 wards in a nearly straight and oblique line at an angle of about 43 to the 

 longitudinal axis of the body, and nearly parallel with the preoperculum. 

 The length from the snout to the end of the subopercular membrane con- 

 stitutes a quarter of the total, and is a fifth greater than the height at the 

 vertical margin of the preoperculum. The snout (from the orbit to the sym- 

 phisis of the intermaxillaries) is more than a third (9-27) of the head's length, 

 and nearly twice (9-5) as great as the oblique height of the preorbital. The 

 eye is moderate, the diameter being contained between five and six (4}-25) 

 times in the length of the head ; the distance from the profile equals two- 

 thirds of that diameter ; that from the lower margin of the preoperculum 

 nearly (8-9) equals the distance from the snout. 



The preoperculum is rounded at its angle, vertical behind and horizontal 

 below. The operculum equals the depth of the preorbital, and the suboper- 

 culum extends nearly an eye's diameter, the distance between the end of the 

 subopercular membrane and the preoperculum equalling the height of the 

 operculum behind the latter. 



The dorsal fin commences nearly over the middle of the operculum, or more 

 than a fifth ('21) of the total from the snout ; the spinous portion occupies a 

 quarter (*25), and the articulate much more than a quarter ("29) of the total 

 length. The spinous portion is nearly uniform, the first spine nearly equal- 

 ling the diameter of the orbit (*4) and the second and following exceeding it, 

 (5 *6) : the whole fin almost imperceptibly increases towards the middle ol 

 the soft part. The articulated rays are not branched, the last only being di- 

 vided at its base. 



The anal fin commences behind the second fifth of the length and nearly 

 under the ninth dorsal spine ; its base equals a third (*33) of the total length ; 

 its height is nearly uniform. 



The caudal is scarcely convex, and forms a sixth (*17^) of the length. 



The pectoral fins extend nearly to the vertical of the anus, and equal in 

 length a sixth ("16) of the total length. 



The ventrals are inserted under the lower axilla of the pectoral, and the 

 length equals an eleventh (*9) of the total ; they are acutely pointed, the first 

 ray being considerably longest. 



The scales are in twenty-four oblique transverse rows ; at the region of great- 



1 3 



est height in ten longitudinal ones, (-) and on the caudal peduncle in seven (-) 



9 3 



rows. The lateral line is composed of simple tubules ; its elevated part runs 

 through nineteen and its caudal portion through five scales. 

 11 1 13 



D. IX. 11 - - A. III. 10 -. Scales 24 . Lat. line 195. 



19 1 8 3 



The color is uniform flesh-colored tinged with brown. 



Total length, 3| 100 



Body Height over ventrals 23 



" of tail 10 



Width 8 



Head Length 2. r > 



Width & 



Height at preoperculum 20 



Height of preorbital 5 



Length of operculum 1" 



[March, 



