BUFFALO SOCIETY OF NATURAL SCIENCES 97 



E 1868 Fragmentary plate. Formation and locality same as pre- 

 ceding. W. L. Bryant, collector. 



E 1892 One half of a dorsomedian plate, fractured along the median 

 keel. The plate is massive and much waterworn, and 

 probably belongs to an un described arthrodire. The 

 half preserved measures 17.5 cm. in length and 12.5 cm. 

 in greatest width. The keel apparently did not extend 

 beyond the posterior extremity of the shield, at which 

 point it is massive and deep (4 cm.), and apparently 

 excavated. Figure 32 shows the restored outline, based 

 on the half preserved. 



Conodont bed (Genesee); Eighteen Mile Creek, near 

 North Evans, Erie County, N. Y. Collected by Prof. 

 P. F. Piper. 



E 2400 Impression in rock, with a fragment of the bone, of a small 

 plate which tapers to a point. It is about 6 cm. long 

 and 3.5 cm. at its widest part. It was keeled in the 

 middle line, and suggests somewhat the dorsomedian of 

 Coccosteus. The bone was very thin and its external 

 surface seems to have been ornamented with broad 

 lines running obliquely across the plate. It is impos- 

 sible, of course, to determine the systematic position of 

 this plate; it will probably turn ou't to be a new genus. 



Conodont bed (Genesee), Eighteen Mile Creek, near 

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

 Bryant. 



E 1988 A small element tapering to a point; perhaps a lateral plate 

 (PI. 20, fig. 2). 

 Other data same as preceding. 



E 2007 A small fragmentary plate apparently belonging to the 

 orbital region of a cranial shield. 

 Other data same as preceding. 



E 2043 A very small juvenile lateral, or "clavicular," of a Dinich- 

 thyid, in matrix; outer view. (Plate 28, figure 2.) 



Rhinestreet shale (Portage); Sturgeon Point, N. Y. 

 Collected by W. L. Bryant. 



