20 FOSSIL FISHES OF LOMPOC 



in THYRSOCLES, but rather shorter, 14 to % depth of body at insertion of 

 anal. In ttiese species the teeth are large, wide-set, about 11 to 13 on each 

 side. 



8. Thyrsocles kriegeri Jordan and Gilbert. 

 (Plates XL XII) 



Of this species we have a fine example (No. 303). Body without 

 head, well preserved, fifteen inches long. Depth under front of anal 2% 

 times in distance to base of caudal ; anal inserted below eighteenth verte- 

 bra, under middle of second dorsal ; neurals nearly straight ; anal fin with 

 about 18 slender rays, the first not falcate, the rays progressively short- 

 ened, the interhaemals very long, slightly curved, parallel, the haemal spines 

 bent strongly backward. Body deeper than in the type of T. KRIEGERI, the 

 depth 4 in length of body proper, the caudal peduncle seeming stouter, 

 an appearance due to the crushing together of the last five vertebrae. 

 Pectoral with about 25 rays, the upper longest, the fin very broad, the 

 lower rays very rapidly shortened, the lowest not one-tenth the length 

 of the upper, which are 2y 2 in depth of body. Ventrals I, 5, well devel- 

 oped, inserted slightly before pectoral, nearly % length of pectorals. 

 Vertebrae probably 22 -f- 24 = 46, little constricted, about as deep as 

 long, the last four or five smaller. No hypural plate. Caudal deeply 

 forked, its rays about 15 -}- 15, the lobes about equal to the depth of 

 body. The soft dorsal with about 15 rays. No trace of scales or 

 finlets. First dorsal obliterated, and only the anterior interneurals 

 showing. In this specimen the upper edges of the vertebral centra are 

 turned backward from the axis. 



No. 306, in duplicate. Twenty inches long, the whole fish about 25. 

 A large fish, the head altogether crushed, but showing compressed mod- 

 erately spaced teeth in a single row. Vertebrae 40 or more, deeper than 

 long. Neurals and hsemals strong; first dorsal lost; second rather high, 

 with strong parallel interneurals reaching more than half way to back- 

 bone. Interhaemals long, slender, curved, oblique, parallel. Anal fin in- 

 serted much behind soft dorsal ; ventrals misplaced, apparently I, 5 ; pec- 

 torals broken. 



No. 51. S l /2 inches long, preserved in duplicate. Each half is the 

 imprint of the middle of the body. It shows twenty-three vertebrae, quad- 

 rate, little constricted, with three strong lateral ridges on each side, ap- 

 pearing as grooves in the imprint. Soft dorsal and anal preserved, the 

 first with about 20 rays (19 interneurals showing), the latter with about 

 18, 12 interhaemals showing very distinctly. 



No. 327 shows 25 vertebrae of the side of the body without head or 

 fins. Neurals and ribs are well shown, with a trace of the spinous dorsal 

 and some small ctenoid scales, perhaps belonging to some other fish. 



