VI u. 



Paqb. 



PALiBONTOLOGY. — The science pertaining to organic remains. 

 Pextamerus. — A genus of brachiopods, so called on account of the in- 

 terior being divided into five apartments ; Gr«ek, 



penta, five, and meros, a portion 58 



Pentamerus oblongus. — A species of pentamerus, very abundant in 



the upper silurian rocks of North America. . . 68 

 Phacops. — A genus of trilobites ; Greek, phakoi, a lens, and opi, the 



eye 58 



Phaoops Limulurus — A species of Phacops, abundant in the Niagara 



group 68 



Pigeon • 168 



Pious. — Latin, a woodpecker. 176 



Picus Aroticus. — The Arctic three-toed woodpecker 17*7 



Picus ERTTHROCEPHALUS. — The Red-hcadcd woodpecker 198 



Piccjs auratus. — The golden winged woodpecker 180 



PiCDs piLEATUs, — The pileated woodpecker 182 



Picus varius. — The yellow bellied woodpecker 184 



Picus viLLOsus. — The hairy woodpecker 185 



Picus pubescens. — The downy woodpecker 187 



Picus canadensis. — The Canadian woodpecker... 187 



Picus martini. — Maria's woodpecker 188 



Picus HiRSUTus, — Banded three-toed woodpecker 188 



Picus caeolinus. — Yellow bellied woodpecker 189 



1*rocyon. — From the Greek, pro, before, and kuon, a dog 253 



Procyon Lotor, — The Raccoon 253 



Parteidce or Qu ul. — Orlyx Vtrginiaiia 284 



Partridge — The Spruce 292 



Ptilodictya 317 



Pecten Islandicus 341 



Porcupine 366 



Quail. — Ortyz Virginiana 284 



Raccoon — Procyon Lotor 253 



Raphistoma staminea 318 



Rhynccnella psittacea 344 



Rocky Mountain Sheep 357 



Silurian Formations, named after the ancient Britons, called by the 



Romans, Silures. 

 Strophomena. — A genus of brachiopods, allied to Leptena ; Greek, 

 strophos, bent, in allusion to the curvature of the shell. 

 Strophomena alternata.— A species characteristic of the lower Silurian 204 

 Strophomena depressa.— A species abundant in the upper Silurian ... 59 

 Streptelasma. — A genus of fossil corals of the Silurian rocks ; Greek, 



streptos, twisted, and plasma, lammellas 121 



Streptelasma corniculum 121 



Streptelasma profunda 128 



Salmon. — Salmo Salar 152 



Schist, 189 



