534 CONTRIBUTIONS TO NOBTH AMERICAN ICHTHYOLOGY lY. 
strong’, not filamentous, the middle ones rather higher than the poste- 
rior, which are considerably lower than the soft rays, the highest spine 
as long as from snout to middle of eye. Anal short and high, its siiines 
graduated. Pectoral very long, 1^ in head, reaching vent. Ventrals 
long, nearly reaching vent, inserted below front of base of pectorals. 
Caudal slightly double concave ; fins little scaly, except at base ; a rudi- 
mentary groove at base of sinuous dorsal, over which scales do not 
pass. Head 2^ ; depth 2§. D. X, 11 ; A. Ill, 7 ; Lat. 1. 50 j coeca 4-7. 
L. 12 inches. Cape Cod to Florida ; generally abundant. 
{Perea atraria L. Syst. Nat. : Centropristis nigricans Cuv. & Val. iii, 37 : Centropristis 
atrarius Gunther, i, 86: Centropristis atrarius Holbrook, Ich. S. Car. 42.) 
tt Dorsal spines produced in long filaments. {Trilobwus* Gill.) 
837. S. trifaarcus (Linn.) J. &, G. 
Grayish, with purple reflections; sides with C dusky gray vertical 
bars meeting across the back; silvery below; head bronze, ’with blue 
streaks in front of eye; dorsal shaded with olive, a large irregular 
black spot near its middle ; dorsal filaments red. Body slender, little 
elevated, subfusiform. Mouth large, nearly horizontal, maxillary reach- 
ing to opposite middle of orbit. Preopercle finely and evenly serrated. 
Most of the dorsal spines and the three lobes ’of the caudal produced 
and filamentous. Head 3 ; depth about 4. D. X, 11 ; A, HI, 8 ; Lat. 1. 
about 55. South Atlantic coast ; not very common. 
{Perea tr if urea l^um. Syst. Nat. i, 489: Centropristis trifiirca Holbrook, Icb. S. Car. 
1860, 49: Antkias f itrcatus Gunther, i, 91.) 
** Caudal lunate or truncate. 
t SerrsB on lower limb of preoi^ercle small, not antrorse. 
a. Canine teeth small. 
b. Dorsal fin continuous, none of the spines elevated. 
c. Serraj at the angle of the preopercle forming one or two groups of 
radiating spines; soft dorsal rather short. {Diplectrum t Holbr.) 
838. 8. faseiCQlIaras Cuv. & Val. — Squirrel Fish; Serrano. 
Brownish above, silvery below, sides marked with 7 or 8 longitudinal 
dark-blue lines; head marked with blotches and lines of dark blue; 
three or four distinct blue stripes across top of head; two across pre- 
orbital, the lower forked ; fins barred with blue and itale yellow. Body 
elongate, not elevated. Head naked above ; mouth rather large, maxil- 
lary narrow, nearly reaching iiosterior margin of orbit. Dorsal and 
* Gill, Cat. Fishes East Coast N. Am. 1861, 30 ; not characterized : tyi>e Perea trifurca 
L. (rp£7?, three ; Aoy5d?, lobe, ; dupd, tail.) 
tllolbrook, Ich. S. C. ed. 1, 32, 1859: type Serranus fascicularis C. V. {8ti, 
two; TtXtjHzpov, spur.) 
