Jordan and Evermann. Fishes of North America. 719 



aa. Lower jaw acute, longer than upper, or more or less produced; teeth small; species ovi- 

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

 6. Lower jaw produced in a long pointed beak, 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. HYPORHAMPHUS, 327. 



</(/. Air bladder cellular; sides of body nearly vertical and parallel ; ventrals 



inserted 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. 



EULEPTORHAMPHUS, 329. 



326. CHRIODORUS, Goode & Bean. 

 (HARDHEADS.) 



<7iriV>tonw, GOODE & BEAN, Proc. U..S. Nat. Mus., 1882, 432, (atherinoides). 



Body and fins essentially as in Hemiramphus, 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. 

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

 Florida, (xpda, want; dopv, lance; the jaw being not produced.) 



1068. 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; vertebrae 31 + 18 = 49. Interorbital 

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

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

 cave ; maxillary 4 in head ; mandible 2J, 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, deeply and subequally forked ; ventrals 2^ in head, their inser- 

 tion midway between snout and base of caudal ; pectorals H 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 4therina, 

 broadest under dorsal fin, where 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; eMof, resemblance.) 



Chriodorus atherinoides, GOODE & BEAN, Proc. U. S. Nat. Mus., 1882, 432, Key West ; (Type, No. 

 26593. Coll. St earns.) JORDAN & GILBERT, Synopsis, 003, 1883. 



327. HYPORHAMPHUS, Gill. 

 (HALFBEAKS.) 



Hyporhamphus, GILL, Proc. Ac. Nat. Sci. Phila., 1859, 131, (tricuspidatits imifasciatus). 



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

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



