438 CALIFORNIA ACADEMY OF SCIENCES. 66 



the fishermen. On the Atlantic coast, the very closely 

 related Pampano, Trachinotus carolinus, is one of the most 

 valued food fishes. We are unable to see any difference 

 of any importance between the present species and the 

 Pampano of the gulf other than the fact that in the Sina- 

 loan form the head seems to be larger and longer. On 

 this difference we have ventured to giye a new specific 

 name to our specimens from Mazatlan. We shall not, 

 however, be surprised if the species proves inseparable 

 from Trachinotus carolinus. 



Allied to Trachinotus carolinus, but with the head 

 larger. 



Head 3, depth 2% ; D. VI-I. 24. A. 11, 1, 23; eye 

 3% in head; snout 3% ; maxillary 2^ ; dorsal lobe 1% ; 

 caudal 1 ^ . 



Body rather elongate, the back moderately and regu- 

 larly arched; snout bluntish. Mouth large, horizontal, 

 the lower jaw included, maxillary reaching past pupil. 

 Lateral line little arched, its curve 1% in straight part. 

 Teeth well developed. Caudal not widely forked. 



Silvery without spot or band: anal creamy orange, its 

 tip whitish. Other fins pale, except dorsal lobe which is 

 dusky- Axil silvery. 



A few specimens taken in the surf, the largest 2}4 

 inches long. Type No. 2690 L. S. Jr. Univ. Mus. 

 Other specimens taken by the Albatross in San Juan La- 

 goon examined; some of these are five inches in length. 



96. Trachinotus rhodopus Gill. ( Trachynotus fascial us 

 Gill: Trachynotus nasutus Gill.) 

 Verv common on sandy shores about Mazatlan, reach- 

 ing the length of about a foot; not much valued as food. 

 Readily distinguished at all ages by the reddish color of 

 the lobes of the dorsal, anal and caudal. These lobes 

 become considerably elevated with age, but at all times 



