404 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
329. Callicanthus lituratus (Forster). Plate LX" and Fig. 177. 
Head 3.8 in length; depth 2.2; eye 5 in head; snout 1.2; interorbital 3.4; I), vi, 29; A. it, 30; I’. Ifi. 
Body oblong-ovate, the greatest depth at base of third dorsal spine; dorsal outline nearly straight 
from tip of snout to origin of dorsal fin, thence in a long low curve to caudal peduncle; no horn or 
prominence on forehead; ventral outline strongly convex from posterior part of chin to origin of anal, 
thence curved uniformly with the back; chin strongly concave, the snout, projecting; mouth small, 
horizontal, in line with axis of body; jaws each with a single series of close-set, bluntly pointed canines 
of moderate size, the edges not serrulate; groove in front of eye short, not half length of orbit; gill¬ 
opening long and oblique, equaling snout, its upper end in line between upper base of pectoral and 
base of second dorsal spine; interorbital evenly convex, the preocular edge of orbit somewhat prom¬ 
inent. Body velvety; each side of caudal peduncle with 2 strong horny plates each with a strong, 
broad flat, spine curved forward, these little developed in the young; in the example upon which this 
description is chiefly based (No. 03493, 12.25 inches long), these spines are nearly as wide at base as 
high, the chord of the posterior edge being longer than orbit; distance between tips 3 in head; first 
dorsal strong, broad at base, rugose, its length about 2.1 in head; dorsal spines heteracanthous, alter* 
Fin. 177 .—CailicanlJms lituvatus (Forster); alter Gunther. 
nately strong and weak on opposite sides; dorsal rays somewhat longer than the spines, especially 
anteriorly; anal spines shorter, of about equal length, about3.fi in head; ventral spines strong, reach¬ 
ing midway between bases of first and second anal spines, their length 2 in head, pectoral longer, 1.2 
in head; caudal evenly lunate, the lobes greatly produced and filamentous in the adult male the fila¬ 
ments in an example 12.25 inches long (No. 03493) being3.5 times length of middle rays; in specimens 
Nos. 05379 and 05381, which are nearly of equal size, the former has the lobes more than 3 times the 
middle rays, while in the latter they are not at all filamentous, the fin being simply lunate. 
Color in life (No. 03380), nearly uniform black, slightly olivaceous below, a lemon-yellow stripe 
in front of eye forward on snout and curving downward just back of angle of mouth; another yellow 
stripe beginning behind eye extending downward as a narrow line.along edge of preopercle, then 
curving forward and joining the other near angle of mouth; lips orange; breast and belly to anal with 
a lemon-yellow stripe blending into the general color; base of anal burnt umber, then changing to 
yellowish, then very black, the edge tipped with light blue; spines on caudal peduncle set in a deep 
orange-yellow blotch, the spines themselves blackish; caudal blackish, the produced rays entirely 
By error mimed Acantliurus unicornis on plate. 
