NO. 9 NEW YORK POTSDAM-HOYT FAUNA 295 



DESCRIPTION OF PLATE 44 (Continued) 



PAGE 



Pagodia scelyi Walcott 269 



Figs. 12 and 12a. (X2.) Dorsal and side views of pygidium. U. S. 

 National Museum, Catalogue No. 58582. 



13 and 13a. (X3-) Dorsal and side views of a small cranidium. 



U. S. National Museum, Catalogue No. 58583. 



14 and 14a. (X 2.) Dorsal and front views of a larger cranidium. 



U. S. National Museum, Catalogue No. 58584. 

 The specimens represented by figs. 12-143 are from locality (77), 

 Upper Cambrian, Potsdam sandstone near the water below the falls 

 at the high bridge, and also at several horizons in the section, the 

 highest point being 70-75 feet (21.3-22.9 m.) above the water in Au- 

 sable Chasm, Essex County, New York. 



Ptychoparia matheri Walcott 268 



Figs. 15 and 15a. (Natural size.) Dorsal and side views of an imper- 

 fect cranidium. U. S. National Museum, Catalogue No. 

 58585. 



16. (Natural size.) Associated free cheek. U. S. National 



Museum, Catalogue No. 58586. 



17. (X2.) Fragment of the interior cast of the posterior portion 



of a pygidium associated with this species. U. S. National 



Museum, Catalogue No. 58587. 

 The specimens represented by figs. 15-17 are from locality (no), 

 Upper Cambrian, shaly calcareous sandstone resting on massive 

 layers of Potsdam sandstone, east side of the town of Whitehall, 

 Washington County, New York. 



