PLATE XI. 

 Dalmanites (Corycephalus) regalis. 



Page 65. ' 

 Fig. 1. A. cephalon, showing' the general proportions, the character of the border and the length of the 

 genal spines The eyes, a portion of the glabella, the occipital ring and part of the light 

 anterior margin have boon destroyed by weathering. 

 Fig. 2. Profile of the same, showing the elevation of the head, the abrupt anterior slope and the direction 



of the marginal denticulations. 

 Fig. S. Front view of the same. 



Schoharie grit. Knox, Albany county. 

 Fig. 4. An imperfect cepbalon, showing the eyes and the glabellar lobes. 

 Schoharie grit. Knox, Albany county. 



Dalmanites (Corycephalus) pygm.eus. 



Page 56. 

 Pig. . r >. An imperfect cephalon, drawn in outline, natural size. 



Fig. B. The same, enlarged to ten diameters, showing the denticulate character of the frontal margin, the 

 elongate glabella and narrow glabellar lobes. 



Corniferous limestone. Canandaigua, Ontario county. 

 Fig. 7. Another head of this species, natural size. 



Fig. S. The same, enlarged to ten diameters, showing the position of the eye, the denticulate lateral 

 border, and the long- cheek-spine. 



Corniferous limestone. Canandaigua, Ontario county. 



