Jordan and Evermann. — Fishes of North America. 719 



aa. Lower jaw acutR, longt-r than upper, or more or less produced; teetli small; species ovi- 

 parous, the anal fin in the male not modified, the caudal fin unetiuallj- lunate. 

 6. Lower jaw produced in a long pointed lieak, usually longer than rest of head, 

 c. Body moderately compressed; pectorals moderate; shore fishes. 



d. Air bladder simple; sides of body more or less convex; ventrals inserted 



anteriorly, far in advance of dorsal. HvpoRHAMi'Hrs, 327. 



dt\. Air bladder cellular; sides of body nearly vertical and parallel ; ventrals 



iu.serted posteriorly, not far before dorsal. Hemiramphus, 328. 



cc. Body very slender and compressed, more or less band-like; pectoral fins very long, 



ventral very short, inserted posteriorly; pelagic species. 



EllLEPTORHAMPHUS, 329. 



326. CHRIODORUS, Goocle & Bean. 

 (Hardheads.) 



Chriodorus, GooDE & Bean, Proc. U. ,S. Nat. Mus., 1882, 432, (aOierinoides). 



Body and fins essentially as in Hemiramjyhus, but both jaws very short, 

 not at all produced, the lower jaw broadly rounded, each with two series 

 of large, tricuspid, incisor teeth, which form a continuous cutting edge. 

 Maxillary anchylosed to premaxillary. Pectorals small ; ventral fins 

 small, median. Scales large. Pharyngeal bones almost exactly as in 

 Hyporhamphus, the lower pharyngeal a little thicker and less concave, the 

 united third upper pharyngeals a little broader and less pointed forward. 

 Vertebr.ie 49. Shore fishes, the single known species from the coast of 

 Florida, (xpeia, want; ^opu, lance; the jaw being not produced.) 



10«8. CHRIODORUS ATHERINOIDES, Goode & Bean. 

 (Hardhead.) 

 Head 4f ; depth 6f ; breadth of body | its depth. D. 14 to 16; A. 15; 

 V. 6; P. 12; scales 7-46 to 48-3; vertebra? 31 + 18 = 49. Interorbital 

 space broad, unevenly convex, its width equal to eye, which is 3'^ in head ; 

 snout 3 in head ; preraaxillaries much broader than long, their edges con- 

 cave ; maxillary 4 in head ; mandible 2i, its tip broadly rounded, not at 

 all produced. Dorsal opposite anal and entirely similar to it ; both fins 

 elevated in front, but not falcate, their longest rays half head ; caudal 

 moderate, dee^jly and subequally forked ; ventrals 2^ in head, their inser- 

 tion midway between snout and base of caudal; pectorals li in head; 

 vertical fins with small scales. Bones of top of head smooth, hard, and 

 translucent. Scales moderate, firm. Translucent greenish above with 

 dark dots on the scales ; a bright silvery lateral band as in Atherina, 

 broadest under dorsal fin, Avhere it is as wide as pupil. Length 10 inches. 

 Florida Keys, locally abundant at Key West, but not yet taken elsewhere ; 

 a handsome little fish, and an excellent pan-fish. It feeds chiefly on green 

 algae. {Atherina; eZf5of, resemblance.) 



Chriodorus atheriuoides, GoODE & Bean, Proc. U. S. Nat. Mus., 1882, 432, Key 'West ; (Type, No. 

 26593. Coll. Stearns.) Jordan & Gilbert, Synopsis, 003, 1883. 



327. HYPORHAMPHUS, Gill. 

 (Halfbeaks.) 



nypnrkampJnis, GiLL, Proc. Ac. Nat. Sci. Phila., 1859, 131, {tricuspidalus= imifasciattis). 



Body elongate, moderately compressed, the sides of body not vertical, 

 but more or less convex ; the dorsai outline parallel with that of the 



