Jordan and Evermann. Fishes of North America. 1367 



bb. Second interhaBmal spine normally developed, not hollow, the air bladder not 



entering it. 



c. Second iuterhnemal spine very short, bluntish; anal spines 2, both small; 



preopercle and preorbital entire. UL^MA 560 



cc. Second interhaemal spine long, spear-shaped ; anal spines 2 or 3, the second 



enlarged. 



d. Preopercle entire; second anal spine moderate. XYST^EMA, 561. 



dd. Preopercle serrate; second anal spine much enlarged. GERRES, 562. 



559. EUCINOSTOMUS, Baird & Girard. 



(MOJAKRITAS.) 



Eucinostotims, BAIKD \- (JIKAHD, Ninth Smith. Report 1855, 20 (argenteus). 



Interhiemal bone of the second anal spine greatly modified, expanded 

 into a hollow cylinder, into which the posterior end of the air bladder 

 enters. Preopercle and preorbital entire ; body comparatively elongate, 

 subelliptiral in form; anal spines 3; the second anal spine and fourth 

 dorsal spine not greatly enlarged. Species numerous in warm seas, re- 

 markable for the structure of the second iiiterha'inal, which is formed 

 somewhat as in Calamu-x, but murh more modified than in the latter genus. 

 (EV, well; HIVSG), to move; droua, mouth.) 



a. Premaxillary groove wholly naked, linear or semioval, sometimes constricted at 



base, but never scaled ; anal rays III, 7. 



ft. Eye very large, its diameter much greater than length of snout, 2| in length of 



head. Exposed portion of maxillary small, triangular; premaxillary groove 



linear. DOWI, 1743. 



bb. Eye moderate, usually more than 3 in head, its diameter about equal to length 



of snout. Exposed portion of maxillary triangular in front, oblong behind. 



c. Body elongate, the back little elevated; greatest depth 3 to 3 in length. 



Anal spines small, the second 4 in length of head. PSEUDOGULA, 1744. 



cc. Body more compressed, deeper, the back more elevated; greatest depth 



2| in length. 



d. Snout blunt ; eye large, scarcely 3 in head ; second anal spine large, 

 2 to 3 in head ; premaxillary groove linear. HARENGULUS, 1745. 

 dd. Snout less blunt ; eye not so large, more than 3 in head ; second anal 

 spine shorter, 3 to 4 in head ; the premaxillary groove becom- 

 ing broader with age, linear in the young ; spinous dorsal black 

 at tip, especially in the young. CALIPORNIENSIS, 1746. 



aa. Premaxillary groove scaled in front, the scales leaving a naked pit behind. Depth 

 2 in length; head 3 to 3 in length of body. Second anal spine about 3J in 

 head. GULA, 1747. 



1743. EUCINOSTOMUS DOWI (Gill). 



Head 3f ; depth 3 ; eye large, 2f in head ; snout 3, and interorbital 3^ 

 in head ; scales 5-45-10. Body rather slender, compressed, elliptical, back 

 little elevated, head flat, with a slight depression above front of orbit. 

 Maxillary triangular and small, the width at the posterior end being ^ the 

 length, which is about ^ diameter of eye, also length of second dorsal 

 spine. Preorbital and preopercle entire. Second and third dorsal spines 

 about equal, the third, perhaps, slightly longer, If in head, all weak and 

 flexible. Second anal spine relatively strong, third weaker, but slightly 

 longer, 2f; base of anal If to 2 in length of head; least depth of caudal 



