Jordan and Evcrniann. Fishes of North America. 41 



fold on each jaw ; teeth small, ^^, erect, rather slenderer in lower jaw ; 

 only the upper teeth show serration near the tip. Pectorals very large 

 and broad, extending beyond dorsal, which begins above root of pectoral. 

 Second dorsal and anal sub-equal, only | size of first dorsal. Eye small, 

 gill openings moderate. (Glinther.) Surinam. (o$>f, sharp ; /St-y^of, snout.) 



(.brchariag oxyrhyncfnis, Mri,i,Ku &HKNLE, Plagiostomen, 41, 1838, Surinam. 

 (';</,?/<(- ....//,////. -7m,, Gi'NTHER, Cat,, vm, 375, 1870. 



26. HYPOPRION, Miiller & Henle. 



Hi/popnon, Mr LLER &: HENLE, Plagiostomen, 34, 1838, (macloti). 



I{i/p<>]>,-!<-n)t1ii, Gir.i,, Ann. Lye. Nat. Hist. N. Y., 1861, 401, (fieiniodon) (toeth serrate on outer side 

 only). 



Characters essentially as in Carcharhinus,'bnt with the lower teeth entire, 

 the upper teeth coarsely serrated at base only, on one or both sides ; lower 

 teeth erect. (VTTO, below; Trptov, saw ; the upper teeth being serrated at 

 base). 



a. Snout obtuse ; its length from mouth % interorbital width ; upper teeth weakly serrate 

 on both sides in adult; second dorsal very .large, more than % base of first. 



BKEVIROSTRIS, 55. 



aa. Snout acute ; its length from mouth 1% times width of mouth ; upper teeth strongly 

 serrate on both sides ; second dorsal small, about % as long as first. SIGNATUS, 50. 



55. HYPOPRION BRETIBOSTRIS, Poey. 



Body robust; head flattened, the snout short, flat, broadly rounded; 

 nostril midway between tip of snout and posterior edge of pupil; preoral 

 part of snout half interorbital width ; width of mouth equal to distance 

 from tip of snout to posterior margin of orbit ; fold at angle of mouth 

 half orbit ; upper teeth broadly triangular, the base finely serrate on outer 

 edge only in young, on both sides in adult ; lower teeth erect. Eye small. 

 Second dorsal unusually large, similar to first and nearly as high. Inter- 

 space between dorsals 2$ times base of first, 2 times second ; anal about 

 size of second dorsal ; pectorals moderate, broad, nearly reaching 

 middle of first dorsal. Gray, fins dusky in young, inside of mouth 

 brilliant white. L. 7 feet. West Indies, north to Charleston, not rare at 

 Key West, where it frequents the wharves with its more dangerous rela- 

 tive, Carcharhinus lamia, (brevirostris, short-nosed.) 



Hypoprion Irevirostris, POET, Repertorio, n, 451, tab. 4, 1868, Cuba ; JORDAN & GILBERT, Proc. 

 U. S. Nat. Mus.,1882, 581; JORDAN, I. c., 1884, 104. 



56. HYPOPRION SIGNATUS,* Poey. 



Snout long, acute, the preoral length 1^ times width of mouth ; nostrils 

 with a short, acute lobe ; pectoral acute, not falciform ; second dorsal op- 

 posite anal, neither base of first dorsal; upper teeth strongly serrate 

 at base, the claw sharp and nearly erect. Cuba. (Poey, description of 

 loiujirostris.) (signatus, marked.) 



iri/)>i,,,ri, in si<j)t<itnx, foEY, Synopsis, 452, 1868, Cuba ; POEY, Enumeratio, 199, 1875. 

 Hypnprion longirnstri*, POEY, Enumeratio, 199, 1875, Cuba. 



*Poey has given names to 2 species of Ilypoprii.ii with the snout long, the 2 differing only 

 in form of the teeth. These are lonr/iroslris, described as above, and sigmtius, known from the 

 teeth only. The upper teeth of siynatus, according to Poey, have the claw triangular and 

 bluutish, the lower teeth bluntish, not flexuous, and somewhat oblique. Probably the 2 are 

 not different species, and $ignalus is the older name. 



