BUFFALO SOCIETY OF NATURAL SCIENCES 51 



is undoubtedly a complete plate, and shows that it was articulated, 

 not fused, with the postero-ventromedian. 



We figure (PI. 12, fig. 3) a very perfect example of the right antero- 

 dorsolateral plate of this species. The original, from the Hamilton 

 Limestone of Milwaukee, Wis., is in the private collection of Mr. E. E. 

 Teller, of Buffalo. 



2. A number of more or less fragmentary remains from the Cono- 

 dont bed (Genesee), at Eighteen Mile Creek. These plates are re- 

 ferred to this species with some reservation, since they are all frag- 

 mentary and none have been found associated. The principal reason 

 for referring them to this species is the character of their ornamenta- 

 tion; but as a somewhat similar ornamentation occurs in Dinichthys 

 magnificus, also found in the Conodont bed, it is quite probable that 

 some of the specimens at least may belong to the latter species. The 

 occurrence of D. pustulosus in the Conodont bed is not surprising 

 since the species has been previously recorded^" from a Genesee hori- 

 zon, namely the New Albany black shale, near Lexington, Kentucky. 



3. Several fragmentary plates from the Genundewa limestone 

 (Genesee), of Eighteen Mile Creek. 



a. Specimens from the Hamilton limestone, Milwaukee, Wis. Col- 

 lected and presented by Mr. Edgar E. Teller. 



E 1894 Imperfect dorsomedian showing the keel; one side of the 

 plate is completely preserved. Length in median line, 

 without process, 17.5 cm.; estimated width when com- 

 plete (measured across widest part) 21. 



E 1896 Beak of a right mandible (PL 13, fig. 2); it is interesting for 

 showing a vertical row of denticles in the s3Tnphyseal 

 region. 



E 2384 Cast of a left antero-superognathal in matrix, shown in 

 outer view (PI. 12, fig. i). This is the specimen referred 

 to above as the first example of this element in D. pus- 

 tulosus to be made known. Height, including process, 

 74 mm.; total width, 44. Original in Mr. Teller's private 

 collection. 



E 2385 Cast of an antero-ventromedian of a rather small individual 

 (PL 12, fig. 2). Length, 10 cm.; maximum width, at 



2" N. Y. State Mus. Mem. lo. 1907, p. 133. 



