268 BULLETIN OF THE UNITED STATES FISH COMMISSION. 
orbital and lower jaw scaly; dorsal fin with 12 to 14 spines and 9 to 14 soft rays; caudal more or less 
forked, the lobes rounded or acute; branchiostegals normally 5; pyloric cceca 2; gillrakers long and 
slender. Tropical seas; species numerous, varying considerably in form, perhaps divisible into smaller 
genera. 
Chromis Cuvier, Memoires du Mus, d'Hist. Nat., Paris. I, IS]a, 353 ( chromis ). 
Helmses Cuvier A Valenciennes, Hist. Nat. Poiss., V, 1830, 195 ( insolatus'), 
Furcaria Poey, Memnrias Cuba, II, 194, I860 ( panda ). 
Jlc/iastcs Giiiitber. Cat.. IV, 00, 1802 (chromis)-, corrected spelling. 
Ayresia Cooper, I'roo. Cal. Ac. Sci. 1863, 73 (punctipinn-is). 
a. Opercle ending in '2 small fiat spines, the upper obscure; body short obvate; dorsal spines xii. clapkrus, p. 268 
an. Opercle without spine; body oblong ovate; dorsal spines xiv. uvalis, p. 269 
209. Chromis elaphrus Jenkins. Fig. 113. 
Head 3.4 in length; depth 2.25; eye 3 in head; snout 3.75-; maxillary 3.75; interorbital 2.5; D. 
xii, 15 or Hi; A. ii, 12; 1’. 18; scales 4-27-9, 20 pores. 
Body short, deep, ovate and compressed, the dorsal outline of body more convex than ventral 
outline; snout short and bluntly conic; anterior outline a little more convex in interorbital region 
than on nape; caudal peduncle about 2 in bead; snout shorter than eye; suborbital, preopercle, and 
opercle entire, the preopercle somewhat crenulate; opercle ending in 2 small flat spines, the upper 
Fig. 113 .—Chromis daphrus Jenkins; from the type. 
obscure; teeth conic, close-set in a single series in each jaw; third dorsal spine longest, 1.8 in head; 
soft dorsal somewhat, higher than spinous portion, slightly rounded, longest rays about 1.7; anal 
rounded, similar to soft dorsal, 1.4; caudal deeply emarginate, the upper lobe slightly the longer, 
about equaling head; ventrals nearly reaching vent, 1.3; pectoral broad, rather truncate, 1.3; scales 
large regular, slightly ctenoid, densely covering entire body and head except snout anterior to nostril 
and tip of lower jaw; lateral line well developed, beginning at upper edge of gill-opening, gently 
arched, following contour of back to within 3 scales of base of last dorsal ray, where it ceases; bases 
of all the fins scaled, those on spinous dorsal largest. 
Color in alcohol, brown above and on top of head, paler below; opercle dusky; fins all plain or 
dusky, without markings; no black spot or blotch upon anterior portion of spinous dorsal, and none 
at base of pectoral. 
