350 EEVIEW OF SPECIES OF BELONID^. 



Head 2^-, depth 7 in head; breadth at pectorals 9. D. 1.15, A. 1.17. 

 Scales 370; 280 before dorsal. Leugth (specimen from San Diego) 13 

 inches. 



Body very slender, subterete, the depth medially little more than the 

 breadth. Caudal peduncle very slender, depressed, broader than deep, 

 the lateral line passing into moderately elevated keel, which is similar 

 to that in T. marinus, but a little more conspicuous. Caudal keel 

 scarcely darker in color than the surrounding region. 



Jaws very long and slender, the upper jaw from eye 3^ times in the 

 length and 2 times length of rest of head. 



Mouth closing almost completely, the base of the upper mandible 

 scarcely arched at all. Eye small, about equal to interorbital width, 

 2f in postorbital part of head, and 8 in snout. 



Teeth sharp and slender, about 25 in the enlarged outer series in 

 each jaw, the small teeth between these numerous, but rather short. 



Scales and probably bones also somewhat green, but less so than in 

 T. marinus, much less so thau in T. rapMdoma. 



Maxillary not nearly concealed by preorbital. 



Interorbital area with a rather deep scaly median depression, which 

 becomes much wider on the snout, its median ridge very smnll. Super- 

 ciliary and temporal ridges little prominent, scarcely striate, the tem- 

 poral ridge nearly straight, without notch behind eye, but with a dis- 

 tinct lateral process about as long as pupil above i)reopercle. Vertex 

 not depressed. No fold of skin across preopercle. 



Cheeks and opercles covered with very small scales, the cheek scales 

 in about 27 rows. No gill rakers. 



Dorsal fin rather low, the posterior rays low; the anterior lobe 1^ in 

 postorbital part of head; base of the fin equal to eye and postorbital 

 part of head. 



Anal higher than dorsal, and beginning considerably farther for- 

 ward. 



Caudal fin formed as in T. marinus, the lower lobe one-fifth longer 

 than postorbital part of head. Posterior margin of the fin slightly 

 lunate. 



Pectorals 1^ in postorbital part of head. Ventrals IJ, their insertion 

 midway between base of middle caudal rays and edge of preopercle. 



Color light green, silvery below. A distinct bluish -silvery lateral 

 band which becomes broader under the dorsal fin. Opercular bar very 

 faint or obsolete. Fins all pale, the caudal and dorsal with some dark 

 points, becoming a little dusky. 



This species is common on the coast of Southern California, where it 

 represents the marinus of the Atlantic Coast. In all respects of size 

 and habits the two are remarkably similar, and the Pacific species 

 is scarcely distinguishable except by the greater slenderness of the 

 body. 



