1877.) 67 [Cope. 
the soft rays; the ventral fin reaches the first spine, and the pectoral the 
first soft ray of the anal fin. Caudal well notched. The maxillary extends 
a little beyond the anterior border of the orbit. Scale formula 7-51-15 ; 
four preopercular rows below orbit. 
Color above dusky, sides silvery, with numerous short undulate vertical 
brown bars irregularly disposed. Opercular black spot short, without 
border ; the dusky of the face is abruptly arrested by a pale band which 
extends backwards from the mouth to the preoperculum. A dark line 
from the chin bounds this below, and defines another silvery band which 
passes along the mandible, the interopercle and subopercle; cheeks, thorax, 
and posterior parts of the dorsal, caudal and anal fins yellow. 
Xystroplites longimanus, gen. et. sp. nov. 
Char. Gen. Inferior pharyngeal bones wide and robust, and paved with 
truncate grinding teeth. The gill rakers of the anterior half of the first 
branchial arch elongate ; those of the posterior half and of the remaining 
gill arches, very short and obtuse. No supernumerary maxillary bone ; 
operculum with a produced, entire superior posterior angle. No teeth 
on the tongue. Spines X. III. 
This genus which has been just published by Prof. D. S$. Jordan,* com- 
bines the grinding type of pharnygeal teeth characteristic of Pomotis, 
with the slender gill rakers recently shown by Prof. Jordant to be charac- 
teristic of the genus Lepomis. 
Char Specif. Body elevated, but the head rather produced, so that the 
profile is oblique and nearly straight from the base of the dorsal fin. The 
depth of the body enters the total length 2.5 times, and the length of the 
head enters the same 3.6 times. The orbit is large, equaling the length 
of the muzzle, and entering the length of the head four times. The inter- 
orbital space is 1.5 times the diameter of the orbit. The muzzie is sub- 
conic, and the end of the maxillary bone reaches the line of the anterior 
margin of the orbit. 
The dorsal fin is elevated, the spines equalling the soft rays and not 
separated from them by a notch. Caudal fin openly notched ; ventral not 
reaching anal; the pectoral very long, reaching the line of the fifth anal 
soft ray. Formula; D. X-12; A. III-11; P. 13. Scale formula 7-44-15 ; 
five rows on the preoperculum below the orbit. 
The color above is dusky, below silvery, the gular and thoracic region 
light yellow. The opercular black spot is short, and has a crimson border. 
Fins black, the caudal, anal and pectoral fins with yellow rays. 
TGA MIONENS cose ob Oc cao eooboOobGOUd > COU COOCCDOGO Oe .170 
Ikeneths to dorsal fin (axial)... 50s. cel. ce ee wee ees 047 
os VIETULGOMC CAN ORAM RCAC Rtsepay ettelet a lehierctat ate aie o'er eo:s .053 
oe anal Sa gou Wirevoraetsrrecittaate a sis ee sierssve .081 
- (HUTT etl easice mmncsie | ME ay cna teretene ya) cilaya1 che ckeieliola-ulele e's) 131 
* Prof. Jordan defined this genus in a paper written some time before this 
one, and which is probably already printed. 
+Proceedings Academy, Philadelphia 1877, p. 7€. 
