64 FOSSIL FISHES OF SOUTHERN CALIFORNIA 



Head about 4 in length to base of caudal, depth 5% to 6 ; a little more 

 than half head ; eye moderate, about half snout, 5 in head ; snout nearly 3. 

 Snout rather pointed, the jaws subequal, mouth oblique, the maxillary 

 about reaching posterior border of orbit ; opercle rounded behind ; branchi- 

 ostegals apparently few and large ; bones of head apparently entire ; first 

 dorsal of about eight slender rays or spines, its height almost equal to 

 depth of body, its insertion at the nape, not far behind gill opening, over 

 third vertebra ; the middle rays highest, but all high ; pectoral insertion 

 moderately high ; nine rays visible, the fin apparently narrow, about as 

 long as snout ; second dorsal, caudal, anal and ventrals obliterated ; certain 

 marks under the throat indicating perhaps jugular ventrals. Vertebrae 

 thirty-nine to forty-one, small and even, growing smaller posteriorly, with 

 short processes and few ribs, one or two of the last vertebrae with base of 

 caudal obliterated. 



This fish seems to belong to the GADID^:, the short, anterior dorsal 

 inserted at the nape, the unarmed head and the narrow pectorals placed 

 rather low, showing some resemblance to the genera POLLACHIUS and 

 THERAGRA. 



The genus is named for Dr. Ralph Arnold, in recognition of his 

 admirable work on the fossil Mollusks of Southern California. 



