OI5 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 2^ 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}4 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 



