BUFFALO SOCIETY OF NATURAL SCIENCES 



73 



Stenognathus insignis, n. sp. 



(PI. 21, fig. 2, and text-fig. 24) 



E 1932 Type. — A right mandible lacking the posterior half of the 

 inserted portion. 



Measurements mm. 



Length of functional portion, including beak 80 



Depth at middle of functional area 24 



Depth of blade portion (2 cm. back of functional part) 25 



Formation and Locality. — Conodont bed (Lower Genesee) ; Eighteen 

 Mile Creek, near Buffalo, N. Y. Collected by W. L. Bryant. 



^^s™,-™.,,,..,,,-.^!?^^?^^^ 



Fig. 24. Stenognathus insignis, n. sp. Right Mandible, Type, X f 

 ^, outer, and 5, inner views. E 1932. (See PI. 21, fig. 2.) 



Mandible long and slender, with the anterior functional portion 

 demarcated from the nonfunctional as in Dinichthys. A prominent 

 dinichthys-like beak present, but no secondary beak or cusp back of 

 it. Functional margin a continuous knife-like edge, rising gently 

 backward to near the point of its union with the nonfunctional por- 

 tion of mandible, whence it slopes more abruptly down to merge in the 

 blade portion. Posterior end of functional margin without denticles. 

 Inner face of fimctional area thins out gradually toward the cutting 

 edge, except near middle of this area, where there is a faint indication 



