Glyptaspis abbreviata sp. nov. 



Page 147 



Right antero-ventrolateral plate. Natural size 



Portage beds ; Valois (North Hector), N. Y. 



Original in New York State Museum 



Similarly ornamented dermal plates belonging probably to the same 

 species, and accompanied by remains of Dinichthys new- 

 berryi Clarke, Aspidichthys, and other Arthrodires, occur in the 

 New Albany (== Genesee) Black slate near Louisville, Ky. In the 

 description of this form [p. 147-49], '^he locality is wrongly stated to 

 be near Lexington, 



