30 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY—II. 
The several species have been contrasted in the following table pre-. 
pared by Dr. Gill and myself :— 
*, Dorsal and anal moderately developed in the male as well as female (extending, 
when declined backward, little if any beyond the base of the caudal); scales on 
cheek and opercles not crowded, and forming more or less distinct vertical series : 
t. Body marked with about eight well-defined dark cross-bars; opercular angle with 
a pretty large black spot, half or more the size of the eye; spots on body and 
fins purplish, red, or goiden; scales large, little crowded ; caudal fin moderately 
elongate, as long as from snout to about the middle of the opercle; lateral line 
usually incompleteibehind 222-1 seeesacces + cee tees en eee ences OBESUS. 
tt. Body without definite cross-bars or bands; opercular spot smaller, but little larger 
than pupil ; caudal fin short, about as long as from snout to the posterior mar- 
gin of the preopercle: 
t. Spots on body and fins pinkish or golden ; dorso-ocular profile moderately convex; 
interorbital space quite depressed, the protruding snout forming an angle above 
the eye ; body rather short and deep, the depth about half-length ; a small black 
spot .atrootrof icaudalys2i2 ACOA secs ees eee GLORIOSUS. 
{t. Spots on body and fins bright blue; dorso-ocular profile little convex, without 
decided concavity above orbits; body comparatively elongate, the depth less than 
hal-length:; no black caudal spot ---22. 222.0 -.e - cose cee e ees MARGAROTIS. 
**, Dorsal and anal fins much enlarged in the males (extending when declined back- 
ward as far as the middle of the caudal fin), but not in the female; scales on 
cheeks and opercles crowded together, forming oblique series; caudal fin very 
long, in the males as long as from the snout to the black opercular spot; in the 
females somewhat shorter; anal spines less rapidly graduated; body and fins 
with round pale spots, some or all of which are bright blue; lateral line complete, 
PINNIGER. 
23. CENTRARCHUS. 
Two species, at least, of the genus Centrarchus inhabit the waters of 
the Southern States, which seem to have been named by Lacépede, re- 
spectively, Labrus macropterus and Labrus irideus. Labrus sparoides 
Lacépéde is also a Centrarchus, either identical with L. macropterus, or 
else it is a species not yet known. It is said to have ten dorsal and 
ten anal spines. Centrarchus sparoides C. & V. is apparently C. macro- 
pterus. 
Centrarchus macropterus is a more elongate species than the common 
Centrarchus irideus. Its mouth is larger, the eye is larger, the fins are 
much larger, and with longer and more numerous spines. The anal fin 
in particular is advanced forward, so that the long spine of the ventral 
fin laps over on the anal as in Copelandia. 
