250 



C. TATE EEGAN. 



Distance from anterior angle to posterior end of base of 

 pectoral nmcli more than h tlie extreme length of the fin. 



2. arniata Philijjpi. 

 Distance from anterior angle to posterior end of base of pec- 

 toral a little more than h the extreme length of the fin. 



8. acnleata Cuv. 



II. No mid-dorsal sei'ies of enlarged denticles in the adult. 



(a) Dermal denticles not carinate. 



Folds at sides of head produced into an angular lobe on each 



side. 4. angelus Dnm. 



Folds at sides of head not produced into lobes. 



5. australis Regan. 



(b) Dermal denticles tricarinate. 



1. Folds at sides of head not produced into lobes. 

 Abdomen and lower surface of paired fins, in the adult, in 



great part covered by dermal denticles. 



6. californica Ayre-s. 

 Abdomen naked ; lower surface of paired fins with mai-ginal 



strips of denticles. 7. africana Regan. 



2. Folds at sides of head produced into two convex 

 lobes on each side. 8. nebulosa Regan. 



0])hichthys unicolor .s-^>. n. (Text-fig. 1.) 



'I'eetli pointed, subequal, in a double series in both jaws and 

 Length of head |- the distance from gill- 



tl 



le vomer. 



