1903.] Hay, Cretaceous Fishes from Mount Lebanon, Syria. 4^5 



No. 4S24a (3845) (PI. XXXIII, Fig. 2), is taken as the type 

 of this species. It has a length of 60 mm. ; to the base of 

 the caudal, of 47 mm. The head is i6 mm. long, and the 

 depth is 20 mm. 



Among the specimens which I am compelled to refer to this 

 species there is much variation in the depth of the body. On 

 PI. XXXIII, Figs. I, 2, are represented two specimens which 

 have very deep bodies. Fig. 3 of the same plate shows an- 

 other specimen, No. 4524c (3855), whose body has less depth. 

 In this, the depth of the body, 15 mm., equals the length of 

 the head. The distance from the snout to the base of the 

 caudal fin is 50 mm. No structural differences are to be seen. 

 Still slenderer specimens occur, as No. 4524^ (3852), which is 

 37 mm. long from the snout to the base of the caudal fin, 

 while the depth is only 10 mm. Between the extremes there 

 are all gradations in relative depth. 



In some of the slenderer specimens there is a tendency tow- 

 ard a deepening of the fins. In No. 4524/ (3841) (PI. xxxiii, 

 Fig. 4), about 50 mm. long to the base of the caudal and 15 

 mm. deep, the rays of the dorsal fin extend backward two 

 thirds of the distance from the fin to the base of the caudal. 

 The anal is rather deep, while the pectoral rays fully reach 

 the base of the ventrals, and the rays of the latter lack but 

 little of attaining the front of the anal. In No. 45 24^ (3842) 

 from Hakel, the dorsal and anal fin-rays extend backward to 

 the base of the caudal. 



In some, but not all, of the slender individuals, the scales 

 appear to be quite thick; but this condition may be due to 

 some peculiarity of preservation. 



The slender specimens described here resemble somewhat 

 0. woodwardi (= Sardinioides attenuatus), described by Dr. A. 

 S. Woodward, from Hakel (Cat. Foss. Fishes, IV, p. 241, pi. 

 xii, fig. 5). However, the latter is a more elongated fish, 

 having the length of the head contained in the distance be- 

 tween the pectoral arch and the base of the caudal fin three 

 times. It also has the scales conspicuously serrated, and only 

 10 or II rays in the dorsal fin. 



All of the specimens, except two, are from Hajula. 



