120 CALIFORNIA ACADEMY OF SCIENCES. 



nn. Distance of adipose from dorsal fin equals J its 

 own length. Maxillary barbels extend nearly to 

 origin of adipose fin; intermaxillary band of teeth 

 5-6 times as wide as deep; eye 2| in the interocu- 

 lar. Pectoral spine less than half as long as the 

 head. Head 4 in the length; depth about 5. Br. 7; 

 D. I, 6; A. 13. (Giinther.) cinerascens 86. 



nnn. Distance of adipose from dorsal fin scarcely less 

 than the length of the adipose. Maxillary barbels 

 extending to base of ventrals; intermaxillary band 

 of teeth 7 times as wide as deep; eye 2 in the 

 interocular; pectoral spine two-fifths the length 

 of the head, serrated along both edges. Head 4 

 in the length; depth 5f ; D. I, 6; A. 12. (Giinther.) 



pentlandi 87. 



II. Adipose fin 2f-3& in the length; D. I, 6-8. quelen 88. 

 kk. D.I, 10. Head granular (in dried specimens), its width 

 not much less than its length. Snout semicircular. Eye 

 in middle of head, 1\ in the interocular, 6 in the head. 

 Maxillary barbels reach to the anal; postmentals to be- 

 low dorsal fin. Dorsal rays subequal in height, the 

 spine with longitudinal furrows, without serration; pec- 

 toral well developed, the spine almost as long as the 

 rays, roughened in front, serrated behind; caudal deeply 

 forked, the upper lobe longer; adipose fin one-third 

 longer than the dorsal fin. Brownish with lighter 

 marbling. Head 5 in the total length. A. 10. (Kner.) 



multiradiatus 89. 



hh. Pores on the head aggregated in several places or not. D. 



I, 7-8. Intermaxillary band of teeth about 4 times as wide 



as deep. sapo 90. 



hhh. Pores on the head aggregated in several places; the most 



conspicuous groups are between the eyes and on lower part 



of opercle. D. I, 7-9. Intermaxillary baud of teeth about 7 



times as wide as deep. hilarii 91. 



gg. A dark lateral band. Maxillary barbels not extending much 



beyond beginning of adipose fin. Pectoral spine short, about 



half as long as the head; top of head flat. wagneri 92. 



ff. Intermaxillary baud of teeth deeper at the outer edges.* 



o. Head 6 in the length; depth 9-10. Dorsal spine nearer origin 

 of anal than to tip of snout, the last dorsal ray nearer snout 

 than to end of adipose fin; dorsal fin higher than long, the 

 spine very weak. Adipose fin about 3J in the length. Lower 

 jaw shorter; intermaxillary band of teeth about 4 times as wide 



*Young of sapo 90. 



