BUFFALO SOCIETY OF NATURAL SCIENCES 53 



E 1980 Right postero-lateral margin of a cranium, showing a 

 branching sensory canal. This plate was referred to by 

 Eastman {Bull. Mus. Compar. Zool., 1897, xxxi, 40) as a 

 suborbital, and the specimen was erroneously attributed 

 to the Encrinal limestone. 



E 2026 About half of a large ventrolateral plate, 21 cm. in greatest 

 width, and about the same dimension in length, which 

 probably belongs to this species. It bears an ornamenta- 

 tion of stellate tubercules, somewhat variable in size. 

 This plate was briefly described by Eastman (Bull. Mus. 

 Comp. Zool., 1897, xxxi, 40) who regarded it as very 

 probably belonging to D. pustulosus. It was originally 

 attributed to the Encrinal limestone, but an examination 

 of the matrix convinces us that it is from the Genundewa 

 limestone (Genesee). 



Dinichthys insolitus, n. sp. 



(PI. 27, fig. 3) 



E 2387 Type. — A small right antero-superognathal; total height, 39 

 mm.; width at middle of tooth portion, 8; width of 

 process, 18. 



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

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

 Bryant. 



Antero-superognathal small and slender; articulating process 

 broad, flat, and not thickened. External face without denticles. 

 Inner vertical margin a sharp edge with no trace of a secondary, or 

 iimer, cusp. Outer lateral margin with an excavation for receiving 

 proximal end of the postero-superognathal; this excavation occupying 

 about one-half the total height of the element, and beginning nearer 

 tip of tooth than upper end. 



Remarks. — This is a well-marked species readily distinguished from 

 all others by the absence of the secondary cusp, and by the remarkable 

 excavation for interlocking with the postero-superognathal. In its 

 slender form and in having a broad, flat process, the element is some- 

 what suggestive of D. newberryi; but in the latter a well-marked sec- 

 ondary cusp is present, and the posterior margin of the tooth is not 



