62 . FOSSIL FISHES OF SOUTHERN CALIFORNIA 



Family 

 7. Arnoldina iniistia Jordan and Gilbert, Sunset Bluff. 



Family GALEORHINID-flE. 

 1. Galeorhinus hannibali Jordan and Beal. 



Recorded from Pliocene deposits in Temescal Canon, the type from 

 the Miocene of Kern County. 



Family LAMNID-ffi. 

 2. Carcharodon arnoldi Jordan. 



In Pliocene deposits in Los Angeles, also recorded as CARCHARODON 

 RIVERSI Jordan, from Quaternary deposits about Santa Monica and San 

 Pedro. The actual age of these detached teeth may be uncertain. 



Family SCYMNORHINID^. 

 3. Scymnorhinus occidentalis (Agassiz). 



Recorded by Jordan and Beal from the Pliocene of Temescal Canon. 

 The type is from the Miocene of Kern County at Ocoya Creek. 



Family DASYATID^. 

 4. Urobatis halleri (Cooper) (?). 



Dr. Ralph Arnold records from San Pedro the sting of a ray not 

 distinguishable from that of the living species, UROBATIS HALLERI. 



Family GONORHYNCHID^( ?). 



5. Ectasis proriger Jordan and Gilbert, new genus and species. 



(Plate XXII) 



The type of this species (No. CXXV) is a long slender fish from 

 the Pliocene of the Los Angeles clayey shale at the Third Street Tunnel. 

 It is 21 inches long to base of caudal ; caudal and pectoral fins lost ; bones 

 of the head indistinct. 



Head in length 3% > depth in head a little more than 2; in length 

 of body 6% ; D. 18 ; A. 20 or more ; vertebrae 36 + 22 =58 ; snout 4%, 

 in head ; eye nearly 4 in head ; mandible extending to eye. Body long and 

 slender; scales small, cycloid, their characters indistinct; bones of head 

 shadowy, apparently heavy and with entire edges ; mouth apparently large, 

 oblique, terminal, mandibles strong. Eye comparatively large; no teeth 

 plainly visible, but very doubtful traces of strong blunt teeth appear at 

 one point ; opercle back of the eye well developed, the angle rounded pos- 

 teriorly ; preopercle indistinct ; branchiostegals apparently broad ; pectoral 

 and ventral fins obliterated. 



