BUFFALO SOCIETY OF NATURAL SCIENCES 71 



Stenognathus gouldi? (Newberry)^^ 



fPl. 15, fig. i) 



E 2392 Anterior half of a right mandible with the beak and cutting 

 edge well preserved. Length, as far as preserved, 82 

 mm. Height at middle of functional region, 29. 



This specimen seems referable to S. gouldi (Newberry), 

 of the Cleveland shale of Ohio. It agrees with this form 

 in size and in absence of the symphyseal denticles, the 

 latter present in S. insignis and S. mixeri, two new 

 species described farther on. If the identification is 

 correct then this species is common to the Cleveland 

 shales and the Conodont bed. 



Conodont Bed (Lower Genesee) ; Eighteen Mile Creek, 

 near North Evans, Erie County, New York. 



Stenognathus denticulatus, n. sp. 



(Text-fig. 23) 



E 2386 Type. — A small right postero-superognathal with upper 

 part of outer face covered with matrix; inner face clear. 

 Width 41 mm.; total height, including process, 17. 



Formation and Locality. — Conodont bed (Genesee), Eighteen Mile 

 Creek, near North Evans, Erie County, N. Y. Collected by W. L. 

 Bryant. 



Postero-superognathal small, elongated, its distal half gradually 

 tapering toward the posterior extremity. Outer face ornamented with 

 four or five downward-pointing denticles extending in a row diagonally 

 upward and backward from the middle of the cutting margin; den- 

 ticles separated from one another by spaces equal to, or exceeding, 

 the width of a denticle, and covered with a shining, enamel-like sub- 

 stance. Inner face concave, except in region of articulating process, 

 which forms a low, rounded, but prominent ridge. 



Remarks. — This element is clearly distinct from any other hitherto 

 described. Its elongation antro-posteriorly seems to us to place it in 

 Stenognathus rather than Dinichthys. The presence of ornamental 

 denticles on the outer face is a very remarkable feature, such 



'1 For full synonjmy and description of this species see paper by Hussakof referred to in foot- 

 note 28, page 68. 



