SEBASTODES 63 



The dorsal fin begins exactly midway in the length to base of the 

 caudal ; it is small, with at least twelve weak rays distinct, their basal swell- 

 ing conspicuous, the anterior rays longest and nearly equal in height to 

 length of base, which in turn is shorter than that of the anal. This latter is 

 weaker than the dorsal, its first rays inserted midway between the begin- 

 ning of the dorsal and the base of caudal. There are apparently more 

 than twenty rays, but much of the fin is obliterated, the bases of about 

 fifteen rays distinct. The remnant of the caudal is the inferior lobe, indi- 

 cating strong, widely divergent rays well supported at the base; hypural 

 lost. 



The vertebrae are strong, markedly wider than long, maintaining 

 their strength well backward, weaker near the head, strongest below the 

 dorsal fin, where the neurals and back of which the hsemals are stoutest 

 and recurved. Anterior vertebrae not modified. 



The relations of this genus are with the Clupeiform fishes, but it is not 

 clear to what family it belongs. The skeleton has much in common with 

 that of .NOTOGONEUS OSCULUS Cope, a large fresh-water fish of the Green 

 River Eocene. But the form of the mouth is quite different if we can trust 

 the shadowy tracing on the fossil. 



With the family of GONORHYNCHID^J we may provisionally, and very 

 doubtfully, associate the genus ECTASIS. The name is from extaoig, 

 extension. 



But one living genus of GONORHYNCHID^E is known. The fossil 

 genus CHARITOSOMUS is evidently related to GONORHYNCHUS. But NOTO- 

 GONEUS diverges considerably from GONORHYNCHUS, and ECTASIS, far 

 more if we can trust the outlines of the. mouth as indicated in the fossil 

 form. 



Family SCORP^NID^E. 



6. Sebastodes rosae Eigenmann. 14 



A preopercle of some Sebastes-like fish was found by Dr. Carl H. 

 Eigenmann, in Tertiary deposits at Port Harford, the port of San Luis 

 Obispo. 



Family GADID^. 



7. Arnoldina iniistia Jordan and Gilbert, new genus and species. 

 (Plate XXVII, fig. 2) 



A small, slender fish (No. XXVI), 3^ inches in length, from Plio- 

 cene deposits of soft shale at Sunset Bluff, near Broadway Tunnel, Los 

 Angeles, the skeleton perfectly preserved, the fins partly obliterated, the 

 first dorsal well indicated. It was collected by High School students 

 under direction of Mr. Ray G. Van Cleve. 



14 Eigenmann: "Zoe," 1, 17. 



