76 



CATALOG OF FOSSIL FISHES IN THE MUSEUM 



the anterior processes long and slender, while the plate proper is some- 

 what triangular, rather than quadrangular as in Dinichthys. 



The type is well illustrated in figure 25. Only the elements re- 

 ferred to in the description above are illiustrated, several confused, 

 thin cranial or ventral plates on the slab, to the right of these elements. 



ASG 



Fig. 25. Stmognathus mixeri, n. sp. Outline of Elements Shown in Type 

 Specimen. X About ^ 



The specimen is preserved in counterpart. E 2030. Rhinestreet shale (Port- 

 age) ; Sturgeon Point, on Lake Erie, near Buffalo, N. Y. 



ASG, antero-superognathal, in outer view; LAT, lateral (or "clavicular"); 

 LMD, left mandible, outer view; PSG, left postero-superognathal, inner xaew; 

 RMD, right mandible, inner view; Scl, segment of the sclerotic ring; SO, sub- 

 orbital — the one above is that of the left side, in outer view; the one below is that 

 of the right side, also in outer view. 



being omitted. These plates show in places an ornamentation of very 

 fine tiibercles. The specimen is preserved in counterpart, but as the 

 bone was much shattered and partly lost in opening the concretion, it 

 was completely dug out leaving only the impression; from this a 



