1903.] Ha}\ Cretaceous Fishes from Alount Lebanon^ Syria. 4^ ^ 



much disturbed that their number cannot be determined; 

 but they are not numerous. Somewhat in front of a perpen- 

 dicular from the origin of the dorsal fin are seen the ventral 

 fins and their supports. The latter are 6 mm. long and rather 

 slender. So far as can be determined, there are only 5 fin 

 rays in each, and the outermost of these is short and claw- 

 like. The divided 'rays are also segmented. The anal fin is 

 disturbed, and the caudal is missing. Another specimen. No. 

 4516/ (3794) (PI. XXIX, Fig. 2 V. /.), appears to have an 

 additional divided ray in the ventral fin. 



In No. 45166 (3700) two or three rows of teeth can be seen. 

 Nothing more can be said of them than that they resemble 

 those of C. armatus. There are indications given by the 

 neural and haemal arches that there were 1 5 or more vertebral 

 segments. 



The block bearing this specimen has been broken along the 

 length of the fish in such a manner as to expose the occipital 

 spine, which was buried in the matrix. This is represented 

 by Fig. 3 on PI. xxix. It is readily seen to be different from 

 that of either C. Undstrcemi or C. armatus, being broad antero- 

 posteriorly and relatively short. The posterior edge is finely 

 denticulated; the anterior edge is nearly smooth. The lat- 

 eral surfaces are ornamented with fine ridges, which rise from 

 the base and either terminate in the borders or ascend to the 

 apex. Just behind this spine there is another process of bone 

 which inay be either another spine or a ridge passing across 

 the rear of the skull. Its hinder border overhangs the an- 

 terior vertebras. 



The co-type, No. 45i6(i (3702) (PI. xxix, Fig. 4), is a small 

 fish having a length of 97 mm. from the snout to the end of 

 the caudal fin. The specimen is especially interesting because 

 it presents the shoulder girdle from below. It is difficult to 

 determine what sutures exist in this region. The lower ends 

 of the right and left halves of the girdle join in the midline, 

 and here the bones are 8 mm. wide, fore and aft. The suture 

 between them is very distinct for a part of the distance across 

 the bridge, but it then becomes indistinct. Whether or not 

 these bones are separated by suture from the bases of the 



