18 FOSSIL FISHES OF LOMPOC 



shortish spines preserved, the first longest, inserted behind pectorals over 

 the sixth vertebra; its interneural springs from between first and sec- 

 ond; pectoral little below vertebral column, of about 18 rays of moderate 

 length, the upper longest, the lower rays rapidly shortened; about 2% 

 in head; a trace of ventrals just before insertion of pectorals, eye oblit- 

 erated; no trace of scales. 



No. 127. Fourteen inches long. 



This specimen shows the whole body with crushed head, soft dorsal 

 and anal lost; vertebrae certainly 40, all much deeper than long, with 

 fine grooves. Head long, conic, pointed, 3% in body. Depth about 

 5% ; postocular part of head rather long, about as long as snout, opercle 

 strongly striated. Teeth obliterated; pectorals lost, ventrals moderate, 

 apparently I 5. First dorsal slender, represented by about six close-set 

 spines, the first of those over ninth vertebra; interneurals slender and 

 weak. Anal, with interhaemals, wholly lost; caudal forked, damaged. 

 Caudal peduncle less slender than in THYRSOCLES. The caudal with rudi- 

 mentary rays at base. 



If Nos. 127 and 153 are really of the same species, the teeth are 

 materially different from those of SCOMBEROMORUS. 



The fish has much in common with ZAPHLEGES and may prove to be 

 not a mackerel at all. 



Ocystias Jordan, new genus. 

 (Type: OCYSTIAS SAGITTA Jordan.) 



A large mackerel with the body very slender, the depth 6% in length, 

 the vertebrae 21 -f- 21 = 42, as deep as long, the posterior more elongate, 

 all sharply grooved. Head moderate, the opercle not expanded, less than 

 half postorbital part of head; teeth unknown. First dorsal of about 22 

 slender spines, the soft dorsal inserted close behind it; interneurals very 

 short and slender, curved, almost hair-like. 



This genus resembles SCOMBEROMORUS in form, and in the form of 

 the spinous dorsal; its interhsemals are much more slender than in that 

 genus. The vertebrae are fewer in number than in SCOMBEROMORUS. 

 Whether the teeth are those of SCOMBEROMORUS is as yet unknown. The 

 body of no other known mackerel is quite as slender. 



7. Ocystias sagitta Jordan, new species. 



(Plate X) 



Type (No. 20) 27 inches long, the whole fish, with damaged head. 



Body very long and slender, even for a mackerel, more elongate 



than in THYRSOCLES or TURIO. Head 5% in length to base of caudal; 



depth 7%. Head broken, the opercle rounded, the posterior part of head 



much shorter than in TURIO. 



