Stewart] Cretaceous Fishes. 329 



There is a bone which I think represents the premaxilla. The 

 teeth are arranged in three or four rows, the largest being in- 

 ternal. The external face of the bone is non-striate, and ex- 

 tends upward and backward, while the internal side is grooved 

 for the maxilla. 



In the description of this part, as given by Cope, s: he says 

 that the premaxillary teeth are in two series. What he means 

 by this statement 1 am unable to say, as four rows of teeth are 

 shown in the figure of his specimen, and there does not seem to 

 be any abrupt change in size transversely. 



The palatine (?) is a long, slender plate of bone, contracted 

 at both extremities, and covered with teeth on the lower side. 

 The number of rows decrease toward both ends and the size 

 of the teeth also becomes less toward one of them. The up- 

 per surface is divided longitudinally by a ridge and the three 

 grooves mentioned by Cope, KS but they are not so strongly 

 marked as to attract particular attention. 



Dentary : Greatest width of dental band 10 mm. 



Length of dental band (estimated i 137 " 



Premaxilla : Length of dental band 28 " 



Greatest width of dental band 9 " 



Palatine: Length 121 " 



Greatest width 17 " 



The top of the skull is preserved completely, or nearly so. 

 The bones represented are the frontals, parietals, exoccipitals, 

 and probably the epiotics and pterotics. 



The frontals are very long bones, broad behind, and probably 

 tapering to a point in front where the extremities are covered 

 with matrix and other bones. On the upper surface the bones 

 are beautifully sculptured with long, coarse striae extending 

 forward from near the center of each bone, while the back por- 

 tion presents only an occasional stria. These bones are espe- 

 cially remarkable for their great length and fragility. The 

 suture between the parietals and the epiotics cannot be made 

 out, although this portion is entirely free from matrix. For 

 this reason I am inclined to think that these two bones are co- 



-7. Cret. Vert. West, p. 226, pL XLIX. 

 Cret. Yort. West, p. 227. 



22 vi 



