1885.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 231 



Caulolatilus microps has also beeu clialleuged as a synonym of C. 

 chrysops, but I find in the present excellent exauii)les additional con- 

 firmation of my belief in tlie si)ecific difference between the two. 



The great dolphin, Coriiphwna hippurus, was sent from Peusacola, 

 Fla., by Mr. Silas Stearns, to whom the Museum is indebted for many 

 collections of great value. 



1. Epinephelus nigritus. (Ilolbiook). 



General color chocolate brown. Iris golden. Lower lip and anterior 

 edge of cheek dark. Margin of soft dorsal and caudal with obscure 

 dark band and bounded by rudiments of a very narrow light edge. 

 Spinous dorsal brown, mottled with flesh-color and dusky. Avery nar- 

 row white margin on the anterior half of the anal and a milky streak 

 along the anal base and posterior margin of the anal. Outer margin of 

 pectoral somewhat lighter than the rest of the fin. Membrane of ven- 

 tral dark with lighter streaks. 



A pair of strong canine-lii-.e teeth on each side of the front of the 

 upper jaw and a single canine on each side in tront of the mandible. 

 The mandibulary teetli small and irregularly arranged anteriorly, and 

 in two distinct series posteriorly. Maxillary teeth in a soracAvhat broad 

 band, the teeth of the outer series very much enlarged, canine-like. 

 Vomerine and palatine teeth small, in somew^hat broad bands. 



Posterior margin of preoperculum denticulated and with the points at 

 the angle somewhat eidarged and irregular. Minute denticulations on 

 the interoperculum and a short area of them on the suboperculum, also. 

 Preorbital and lower limb of preoperculum smooth. Gill-rakers fur- 

 nished Avith rather large teeth, usually in two series. 



' Measurements of Epinephelus nigritus {No. 37207.) 



Lengfh to end of middle caudal rays. . 

 Body : 



Greatest width 



Height at veiitirtls 



Height at anal origin 



Least height of t ill 



Head : 



Gre.atpst length .. 



Length of longest gill-raker 



Greatest width 



Width of interorhital area 



Lengi h of snout 



Length of opeK nlum 



Lengtli of maxillary 



Length of mandible 



Distance from snout to orbit 



Diameter of eye, 



Dorsal (spinous) : 



Distance from snout 



Length of l)ase 



Lcn.lh of first spine 



Length of seconil spine 



Length of last spine . 



So'lt: 



Length of base 



Length of longest ray 



Length of last ray 



Millime- 

 ters. 



132 



290 

 221 

 100 



338 

 28 

 12(i 

 65 

 8G 

 120 

 l.SO 

 179 

 100 

 42 



310 

 2.'J0 



5!) 

 ].'.") 



60 



181 

 92 

 47- 



Anal: 



Distance from snout 



Length of base. 



Length of first spine 



Length of seroud spine 



Length of third spine 



Length of first ray 



Length of longest ray 



Length of last ray 



Caudal : 



Length of middle rays 



Length of external rays 



Pee t oral: 



Distance from snout 



Length 



Ventral : 



Distance fiom snout 



Length 



Branch iostegals . . . 



Dorsal 



Anal 



Kumbcr of developed gill-rakers . . 

 Numbei' <if sc.iles inlalenil line . . 

 Number of transverse lows above latei 



alline 



Xumber of transveise rows below latei 

 al lino 



Millime- 

 ters. 



605 



140 



25 



47 



64 



107 



110 



69 



150 

 159 



295 

 147 



335 



145 



7 



xi, 14 



iii, 9 



2.13 



1('7 



