1903.] Hay, Cretaceous Fishes from Mount Lebanon^ Syria. 437 



Anguillavus, gen. no v. 



The characters of this genus are included in those of the 

 family. The type of the genus is Anguillavus quadripinnis . 



Anguillavus quadripinnis, sp. no v. 

 Plate XXXVI, Figures 2 and 3. 



Of this species there is recognized in the collection only a 

 single specimen, No. 4512 (3796), collected at Hajula. This 

 specimen lacks the whole of the caudal region. It is lying 

 on the block with the dorsal surface directed upward. The 

 following dimensions are noted: Length of the head to the 

 occiput, 25 mm.; to the posterior border of the opercular ap- 

 paratus, 33 mm. Length from the snout to the thirty-eighth 

 vertebra, 90 mm.; height of the body, 14 mm. 



The suspensory apparatus of the jaws is extended laterally. 

 Hyomandibular and quadrate are present, and from the dis- 

 tal end of the latter the mandible runs forward and projects 

 somewhat beyond the snout, as in Anguilla. Parallel with 

 the premaxillae on each side are the maxillae. Starting from 

 the quadrate there runs forward on the left side a very dis- 

 tinct palatopterygoid arch. The pterygoid portion termi- 

 nates 7 mm. behind the snout. For a great part of its length 

 this portion has a width of only one millimeter, and the width 

 is occupied by two distinct bones. Of these, the inner is re- 

 garded as the entopterygoid, the outer, as the ectopterygoid. 

 The anterior ends of these bones lie on the upper surface of 

 the parasphenoid, as do also the corresponding bones of the 

 other side ; but this position is probably due to some shifting 

 during decomposition. Immediately in front of these ptery- 

 goids there is, on each side, a small, scale-like bone which may 

 be the prefrontal. Outside of these, underlapping the anterior 

 ends of the pterygoids, and extending forward toward the 

 snout, are two delicate bones, one on each side, and these I 

 regard as the palatines. The appearance of these bones in- 

 dicates that they were already much reduced. There are 

 almost certainly no teeth on the arch thus constituted. A 

 bone resembling a supramaxilla lies above the maxilla. 



