278 CALIFQRNIA ACADEMY OF SCIENCES. 



Fontanel elongate, open in front in the young, reduced 

 to a round opening and entirely surrounded by bone in 

 the adult. Occipital process very broad; dorsal plate 

 more than twice as wide as its length on a median line, 

 having two long, backward, projecting processes which 

 are not curved downward. 



Eye small, lateral, 1| in snout, 6-7 in head, 4-4h in 

 interocular. Snout blunt, the width at rictus If in the 

 length of the head; lower jaw somewhat projecting; teeth 

 villiform, the intermaxillary band deepest in the middle, 

 about 8 times as wide as deep. 



Maxillary barbel reaching about to middle of pectoral, 

 mental barbel 1|-2| in length of head, postmental bar- 

 bel reaching a little beyond base of pectoral. 



Humeral process not extending to middle of pectoral 

 spine, its surface with sharp granules, its lower edge 

 serrate. Pectoral pore wanting. 



Distance of dorsal spine from snout 3-S^ in the length; 

 dorsal spine in 5 about equal to or longer than the pec- 

 toral spine, 4i-6i in the length; the anterior margin of 

 the dorsal spine with numerous diverging thorn-like 

 spines, the posterior margin smooth; the first soft ray 

 shorter than the spine. Distance between dorsal and 

 adipose fins 2i-2yV in the length. Caudal fin obliquely 

 truncate, the upper longer rays 5-5j in the length. 



Anal fin high, strongly rounded posteriorly, the an- 

 terior two or three rays approximated and elongated, 

 bearing the urogenital organ. 



Ventral fins short, broad, li-2 in the head. 



Pectoral spine strong, with strong teeth on both mar- 

 gins and short serrations on each side of the larger teeth 

 on the anterior margin. 



Dark brown, the head with darker spots, the sides 

 with elongate dark spots and numerous dark points on 

 lower half of sides, sometimes extending upon the ven- 



