Stewart.] Cretaceous Fishes, 3:>9 



above, especially in the posterior portion, where there is a strong 

 bar just below the articular. The internal side is finely striate 

 and deeply grooved. The small teeth on the external side are 

 in two rows, of which those on the external row form a minute 

 fringe, while- those on the internal are larger and are directed 

 slightly forward. Those of the internal series are large at the 

 center but decrease in size toward the extremities. Each of 

 these is set upon a bony tubercle, as in E. nep&olica. The ar- 

 ticular portion is very similar to that portion of the species 

 just mentioned. 



Length of alveolar border 121 mm. 



Depth at last tooth 38 " 



Transverse diameter of cotylus 11 " 



There are numerous other bones, including the ceratohyals, 

 postorbitals. and a fragmentary ethmoid. The ceratohyals do 

 not differ materially from those of E. nepseolica excepting in 

 size. The ethmoid is more blunt than in the species just men- 

 tioned and bears a single row of eight or nine teeth on the 

 median line below. The postorbital is somewhat hook-shaped 

 and has a roughened articulating surface internally. 



Empo contracta. 



Empo <>>nt racla Cope, Havden's Bull. U. S. Geol. Surv. Terr. No. 2, 1874, 

 p. 10: Cret. Vert. West, p. 232. 



The specimen referred to this species consists of the greater 

 portion of palatine and dentaries, the hyoid arch, numerous 

 vertebrae, and other bones. As the original description of this 

 species is rather vague and the figures are of fragments only, it 

 will always be difficult to identify this species with any degree 

 of certainty unless access is had to the type specimen for com- 

 parison or until it is more completely described and figured. 

 The specimen is much smaller than the one described above as 

 E. 8< mianci 



Only the internal sides of the dentaries are shown. The ex- 

 ternal series of teeth do not seem to be as large as in E. semian- 

 described above. The teeth of the inner series are long, 

 acutely pointed, and directed slightly inward at the apices. 

 The maxillae are present with probably all of the teeth, which 



