22 FOSSIL FISHES OF LOMPOC 



and the interhaemals are shorter than in 303 and 306 and shorter than in 

 the type of T. KRIEGERI. 



No trace of finlets or of scales preserved. 



It is evident that this species cannot be placed in the genus THYRSITES, 

 the form of the first dorsal and pectoral being quite different, the caudal 

 fin being much stronger. 



(loxotptov, a small grate, or gridiron.) 



Side of a large example (No. 12), 20 inches long in life, the frag- 

 ment 12 inches without head or tail, but showing the strong quadrate 

 vertebrae, as deep as long, with the dorsals and anal fin ; distance from 

 front of first dorsal to front of anal l / 5 more than depth of body below 

 second dorsal. First dorsal of 15 to 20 slender spines, the count not 

 exact; soft dorsal falcate, with 17 rays evident and probably 4 or 5 

 more lost, there being 21 interneurals corresponding to rays. Anal rays 

 not to be counted, probably about 25, the first interhaemals very oblique, 

 curved backwards, the others long and parallel ; first interhsemal inserted 

 nearly under front of soft dorsal, the first anal ray nearly under middle 

 of dorsal fin ; vertebra strong, sub-quadrangular, deeper than long, each 

 with two strong lateral ridges, between 45 and 50 in all, but some at 

 both ends broken, about 12 having interhaemals along base of anal fin. 

 The caudal vertebrae (16 preserved) must have been about 24. 



No. 23 is a fragment about 10 inches long of a large fish, with 

 quadrate vertebrae, each three-ridged, along the side. The head and tail 

 are wanting. 



The pectoral fin shows twelve or more rays. The soft dorsal shows 

 about 14 interneurals and a few anal rays show. 



Another specimen (in duplicate, 69 A and 69B) seems to belong to 

 THYRSOCLES ESCHARION. It shows the anterior region, a head wholly 

 crushed, with twelve vertebrae, short and quadrate. A few dorsal spines 

 may be traced. The posterior part of the head is relatively short, a char- 

 acter which, with the numerous vertebrae, will distinguish the species 

 from TURIO. 



No. 15. Body with tail, well preserved ; interhaemals relatively short ; 

 vertebral axis turned forward above. A typical example, much like No. 

 280. 



12B. Posterior region showing well, 20 dorsal rays, and anal rays 

 24. Interneurals and interhaemals typical. 



No. 318. The tail of a fairly large fish, the caudal itself entirely 

 crushed and displaced. It shows 19 vertebrae, each quadrate, deeper 

 than long, with three longitudinal ridges and grooves, the neural and 

 haemal spines rapidly shortened behind. 



For purposes of comparison we add the following notes on living 

 species : 



