BUFFALO SOCIETY OF NATURAL SCIENCES 61 



b. Suborbitals 



E 1984 Anterior portion of a right suborbital, showing sensory canal; 

 without ornamentation. The plate is comparable in size 

 with its homolog in Dinichthys newberryi, and perhaps 

 belongs to that species. 



E 1992 Suborbital of a small diniclithyid. 



E 2001 Imperfect suborbital showing sensory canal; ornamented 

 with fine tubercles. It probably belongs to the same 

 species as the preceding. 



c. Mandibles. 



E 2510 Functional portion of a right mandible of a species about the 

 ?ize of D. newberryi (PL 14, fig. 2). The blade portion is 

 broken away and the oral margin is deeply excavated, 

 probably through wear. The mandible seems to have 

 belonged to an old individual. The beak, however, is 

 sharp and prehensile; its outer surface shows the 

 bevelling produced by the play of the antero-superog- 

 nathal against it. The inner surface of the beak is hol- 

 lowed out. It is therefore much weaker than most 

 dinichth)dd mandibular cusps, and in this respect and 

 in its slender proportions the mandible resembles that 

 of a very large Stenognathus. 



E 1941 Beak of a right mandible. 



E 1948 Portion of the cutting blade of a small mandible. 



d. Antero-superognathals 



E 1951 A very small left antero-superognathal (PI. 18, fig. i), the 

 smallest element of the kind ever foimd. Its height is 8 

 mm.; width, 11. It is, of course, not known what 

 species it represents. 



E 1952 Two small right antero-superognathals, perhaps young of 

 Dinichthvs newberrvi. 



Dinichthys newberryi 



