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



tral of R. eretes is about 30 mm. and the breadth 20 mm., as 

 compared with 50 mm. and 25 mm. respectively in R. tenui- 

 rostris. 



We cannot be certain what was the form of the apex of the 

 pectoral fin of the species here described, since, after taking 

 into account the remnants of the right and the left fins, 

 there yet remains about 30 mm. of the border unrepresented, 

 and this includes the apex. 



The mouth of R. tenuirostris appears to have been smaller 

 than that of R. eretes, the former being said to measure about 

 ^^ mm. from side to side, while the latter measures 40 mm. 

 In the mouth of R. eretes there are seen several rows of teeth. 

 The)^ each measure a millimeter in length parallel with the 

 jaw, and each has a thin cutting edge, in the middle of which 

 is a conical point. 



The vertebrse have a diameter of about 7 mm. Davis 

 states that those of R. tenuirostris have a diameter of o.i inch, 

 but this is obviously an error. The length of those of R. 

 eretes is 2.6 mm. ; and, according to this, there would be about 

 1 5 of them between the pectoral and the pelvic girdles. Davis 

 states that those of R. tenuirostris have a length of .15 inch, 

 and that there are 14 of them between the two girdles. 



Over the greater portion of the body of the specimen here 

 described the shagreen has been removed. There is, however, 

 a band of stellate scales along the margin of the rostrum ; and 

 further toward the midline, apparently on the upper side of 

 the rostrum, there are three or four rows of similar scales. 

 Along the greater part of the border of the front lobe of the 

 pectoral fin the shagreen has become smooth, and each scale 

 nearly circular in form. Probably this represents the general 

 character of the shagreen. 



RAJID^. 



Raja whitfieldi, sp. no v. 



Plate XXVIII. 



This new species is represented in the collection by three 

 specimens, No. 4505a (3707), No. 4505^ (3708), and No. 



