24 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY—II. 
15. XYSTROPLITES, gen. nov. 
This genus bears nearly the same relation to Eupomotis that Lepiopo- 
mus does to Xenotis. It comprises those Centrarchide which, wanting 
the supernumerary maxillary bone, have the teeth of the lower pharyn- 
geals blunt and paved as in Hupomotis, and the gill-rakers long and 
relatively slender as in Lepiopomus. The pharyngeal bones themselves 
are much narrower and smaller than in Hupomotis, being in form more 
like those of Xenotis. The teeth are less strongly “‘paved”, being 
smaller, less crowded, and rounded rather than truncate; on the inner 
border of the bone are a few enlarged acute teeth. The species of 
Xystroplites, as of Hupomotis, have the short rounded ear-flap bordered 
below and behind with orange. The type is the species below. de- 
scribed under the name of Xystroplites gillii. Pomotis heros B. & G. 
also belongs to this genus. The known species strongly resemble 
Lepiopomus pallidus (incisor) in outward characters, and lack the bril- 
liant coloration of Hupomotis aureus. The name Xystroplites is from 
Evetpov, an instrument for scraping (gill-raker), and ézA‘ryjs, armed, in 
allusion to the armature of the gill-rakers. 
16. XYSTROPLITES GILLII, sp. nov. 
Head 24 in length; depth 2; eye about equal to flap, 43 in head. 
Body elongate,.very deep in the middle, abruptly narrowed each way. 
Greatest depth at the beginning of dorsal; a rapid slope from this point 
to the base of elongate caudal peduncle; a steep curve from dorsal to 
occiput, where an abrupt angle is formed with the projecting snout. 
Top of head sloping at an angle of about 45°. 
Mouth wide, lower jaw a trifle longest ; maxillary reaching just past 
the front of the pupil. Flap moderate, broad, with a very wide pale 
edge below and behind. Dorsal spines moderate, as long as from snout 
to middle of orbit; pectorals medium, barely reaching anal. Dorsal X, 
10. Anal III, 9. Scales large, 6-42-13; 5 rows on the cheek. 
Coloration obliterated ; apparently uniform olive; traces of dusky 
mottlings on last rays of dorsal and anal. 
Type, No. 5995, United States National Museum, from Garden Key, 
Florida. 
This species may be known from its congener X. heros by the peculiar 
form, and from the species of Lepiopomus by its dentition. 
