826 CALIFORNIA ACADEMY OF SCIENCES. 
the upper lateral keel of body is a ridge broken up into 4 
irregular spines, larger than:the body spines; 4 triangular 
spines on edge of preopercle, the upper one the largest; 
a very irregular ridge running from upper preopercular 
spine, under eye, to snout; a ridge on upper part of 
opercle. 
Body with 4 ridges on each side, formed by the scales, 
each of which ends in a spine; traces of a ridge between 
lateral ridges; the spines on abdominal ridges as sharp as 
those on rest of body; a Y-shaped ridge of spines in 
front of ventrals, the forks toward the ventrals and the 
base ending at gill-membrane; a raised area between ven- 
tral fins, running from their base to opposite their tips, 
which is entirely covered with small prickles; the anus is 
in the posterior end of this; the dorsal and abdominal 
ridges coalesce with their fellows of the opposite side, but 
they come together so gradually that it is impossible to tell 
exactly where they unite, as the spines continue distinct 
to the caudal fin. Small spines covering the outer part 
of the base of the pectoral; a ring of spines around caudal 
base; a few minute spines on eye above pupil; occiput 
abruptly lower than body, but scarcely forming a pit, as 
the body is about level behind it. 
Spinous dorsal highest in front, the second spine reach- 
ing to base of last spine when fin is depressed; the dorsal ~ 
rays subequal in length, the last not shortened and not 
adnate to body; last ray reaching to the tenth plate before 
caudal fin; pectoral fin posteriorly rounded in outline, the 
lower rays not produced; it reaches to the second plate 
before anal fin; ventrals small, reaching just past vent; 
anal longer and lower than soft dorsal; dorsal and anal 
ending at the same corresponding place; caudal fin 
rounded behind. 
Color, in spirits, gray, with 7 or 8 dark cross-bars; head 
