818 CALIFORNIA ACADEMY OF SCIENCES. 
running simple backwards, becoming obsolete on caudal 
peduncle; all the ridges with sharp recurved spines, with 
the exception of abdominal ridges behind part of anal; 
where the dorsal and anal ridges disappear the caudal 
peduncle assumes a quadrangular shape, the corners being 
formed by the spines of the lateral ridges; no row of 
spines around base of caudal or pectoral. 
Fins all very high, origin of dorsal between the fourth 
and fifth dorsal plates, the fin to base of last spine covering 
6 plates, the membrane covering 24% more; the second and 
third spines the longest, a membrane connecting the last 
spine to the body for its whole length; when fin is de- 
pressed the ends of the last spines reach to the front of 
second dorsal; the second dorsal to end of last ray covers 
8 plates, the membrane covers one more; the second and 
third rays are the longest, the last ray is connected to the 
body for about a third of its length; base of anal cover- 
ing 8% plates; the rays are very long and not differing 
much in length, the last ray not connected to body by a 
membrane; the fin begins in front of soft dorsal but 
is about coterminous with it, its rays when depressed 
reaching past ends of soft dorsal, 6 plates past base of 
its last ray; pectorals barely reaching to tip of last dorsal 
spine, the fin pointed above, first and second rays the 
longest, the lower rays produced beyond the membrane, 
making a notch in posterior outline of fin; origin of ven- 
trals directly below base of pectoral, their tips reaching 6 
plates beyond their base; caudal long and truncated; 
vent directly behind base of ventrals. 
Color light brown above, white below; back with many 
narrow brown bars placed at irregular distances apart; 
head with many blended brown spots, one under eye, one 
on front margin of eye, one or two on top of head, one 
behind eye, one on preorbital, a similar spot on base of 
