INDEX. 



329 



Northamptonshire, fossil mollusca 



of, 257 



Norwich, corals near, 96 

 Crag, 292 ; fossils of, 292, 



293 ; division of, 293 ; localities 



for fossils in, 294, 295 

 Nummulite limestone, 29 



O 



Oldkamia, 35 



Oniphyma, 78, 79 



Oolite, Great, sponges in, 19 



fresh-water beds of, 251 ; 



fossils in, 261 

 mollusca of, 255 ; localities 



for, 258, 259, 260 



Yorkshire, fossils of, 257 



Oolitic corals, 91 



Crustacea, 206 



echinoderms, 154; localities 



for, 154-6 



encrinites, 117, 128 



polyzoa, 217 



Old Red Sandstone lakes, the, 240 

 Ossicles of encrinites, 114 

 Orlhoceratites, in Yoredale shales, 



116 

 Ostrea vesdcularis, 268, 269, 270 



Palaechinus, structure of, 153 



Palaeontographical Society, 324 



Paludina, Wealden, 239 



Paramoudra, 26 



Peak district, encrinites in, 118 



" Pear encrinite," 128 



Pentacrinus, 113, 128 



Pentamerus Knightii, 78, 235 



Pentremites, 130, 132 



Perforata, 66 



" Periwinkle Rocks," 38 



Permian mollusca, 251 ; localities 



for, 252 



Phillipsastraa, 89 

 Phosphorite, 208 

 Phosphate, sponges converted into, 



26 



Pliocene fossils, 278 



Planorbis, Eocene, 240 



Platycrinus, 127 



PleurograptuS) 48 



Polyzoa, appearance of living, 21 1 ; 

 their relation to Brachiopoda, 

 214; localities for fossil kinds, 

 215-217; in Coralline Crags, 284 



Portland stone sponges, 19 



Poteriocrinus, 122, 127 



Prestwich on the Crags, 285 



Productida, 232 



Productus giganteus, 232 



Llangolliensis, 232 



Pyritized encrinites, 128 



Purbeck limestone sponges, 16 



Radiata, 104 



Radiolarians, 18, 32 



Ramsey Island, graptolites in, 48, 53 



Rastrites, 43, 47 



Reef-building corals, 69 



" Rose encrinite," 125 



Rhabdophora, 40, 46 



Rhsetic mollusca, 253 ; localities for, 



253, 254 



Rhodocrinus, 125, 127 

 Rhynchonellidte, 229 

 Rhynchonella socialis, 232 



Wilsonii, 232 



Rugosa> 62, 64 



Saccosoma, 129; of Oolite, 112 



Salenia, 152 



Scarborough, corals near, 91 



" Screwstones," 119 



Sea mats, 209 ; structure of, 2IO ; 



distribution of fossil, 2 1 1 

 Secondary corals, 90 

 Serpula, 170; in Oolite, 172; in 



Chalk, 173 

 Sertularians, modern, structure of, 



41 

 Silurian cephalopoda^ 308 



