1903.] Hay^ Cretaceous Fishes from Mount Lebanon, Syria. 43^ 



18 or 19 rays, but there are 20 interhaemals present. The 

 middle of the back, from the occiput to the dorsal fin, is occu- 

 pied by a line of crimpings, such as have been mentioned by 

 Dr. A. S. Woodward in the case of M. lihanicus. These have 

 the appearance of narrow folds or ridges, which are directed 

 upward and backward, each ending in a point. What the 

 relation of these crimpings is to the median row of scales has 

 not been determined. 



The pectoral fins are missing from this specimen. The 

 ventrals are inserted somewhat in front of the origin of the 

 dorsal, but they may have been moved slightly forward 

 through distortion. 



Another specimen. No. 45256 (3677), is a slenderer fish than 

 the type, but this elongation may not be wholly natural. 

 The head has a length of 19 mm., while the depth is only 16 

 mm. The length of the head is contained in the total length 

 of the fish 4 times, as in the type. The fin rays agree closely 

 with those of the type. The ventrals are placed beneath the 

 origin of the dorsal. Fifteen rays are counted in the pectorals 

 and 13 in the ventrals. In front of the interneural bones 

 which support the dorsal fin rays there are at least 12 others 

 which have no rays. These have the upper ends expanded 

 and turned somewhat forward. These are seen also in the 

 type of the species. Both specimens show also an enlarged, 

 free, and spine-like ray in the midline above and below and 

 just in front of the first caudal rays. It was wholly, or almost 

 wholly, buried in the flesh. There are on each side at least 

 9 branchiostegal rays. 



No. 4525c (3798) is a third specimen of this species. It is 

 nearly complete, and it has a length of 84 mm.; to the base 

 of the caudal of 65 mm. The head is 21 mm. long; the depth 

 is 19 mm. There are 49 vertebras. The origin of the ven- 

 trals is beneath that of the dorsal fin. There are apparently 

 26 rays in the dorsal, and these are supported by 23 inter- 

 neurals. The anal fin is supported by 20 interhaemals. The 

 crimped scales in front of the dorsal are seen. 



No. 4525(i (3803) has a length of no mm. No. 4525^ 

 (3816) shows unusually well the crimpings in front of the 



