INDEX. 



503 



Pholas, 201. 

 Phorodon, 426,427. 

 Photuris, 435. 

 Phoxichilidium, 376, 377. 

 Phyllactis, 131. 

 Phyllium, 415. 

 Phyllobranchus, 236. 

 Phylloceras, 254. 

 Phyllocnistis, 461. 

 Phjllodoce, 294. 

 Phylloxera, 428, 430. 

 Phymactis, 131. 

 Physalia, no. 

 Phytoptus, 376. 

 Pieris, 469, 471. 

 Pilidium, 315. 

 Piloceras, 244. 

 Pinna, 206. 

 Planaria, 320. 

 Planolites, 289. 

 Planorbis, 231. 

 Platephemera, 396. 

 Plathemis, 401, 402, 404. 

 Platyceras, 215. 

 Platycrinus, 156. 

 Platypus, 444.' 

 Platystrophia, 274. 

 Pleurobrachia, in, 112. 

 Pleurobranchus, 232, 233. 

 Pleuroceras, 252. 

 Pleurodictyum, 115, 116. 

 Pleurophyllidia, 236. 

 Pleurotomaria, 214, 215. 

 Plexaura, 125. 

 Plocamophorus, 236. 

 Pneumodermon, 242. 

 Pocillopora, 136. 

 Podocoryne, 100. 

 Podophrya, 59, 60. 

 Polinices, 221. 

 Polistes, 481. 

 Polycirrus, 299. 

 Polygordius, 292. 

 Polygyratia, 231. 

 Pontobdella, 309. 

 Pontolimax, 236. 

 Porcellana, 352. 



Porites, 141. 

 Porpita, 109. 

 Porthetria, 463. 

 Poteriocrinus, 155. 

 Prionidus, 423. 

 Productus, 274. 

 Progonoblattina, 413. 

 Prophysema, 68. 

 Prosopis, 482. 

 Prosopistoma, 399. 

 Protamoeba, 13-15, 24, 53. 

 Proterospongia, 50, 65, 66. 

 Protogenes, 16. 

 Protohydra, IO2, 103. 

 Protomyxa, 1820. 

 Protorhyncha, 276. 

 Psammobia, 211. 

 Psammolyce, 295. 

 Psammosolen, 211. 

 Pseudothelphusa, 357. 

 Psocus, 409. 

 Psolus, 192. 

 Psyche, 457. 

 Pteria, 206. 

 Pterinopecten, 203. 

 Pteroceras, 226. 

 Pteronarcys, 404. 

 Pterotrachea, 238. 

 Pterygotus, 366. 

 Pulex, 493. 



Pycnogonum, 376, 377. 

 Pygaster, 182. 

 Pyrgia, 114. 

 Pyrina, 187. 

 Pyrophorus, 440. 

 Pyrrhactia, 464. 



Radiolites, 134, 213. 

 Ranatra, 419, 421. 

 Raninoides, 351. 

 Raphiophora, 79. 

 Reniera, 81. 

 Renilla, 120-125. 

 Reophax, 32. 

 Retepora, 288. 

 Rhipidogorgia, 126. 

 Rhizostoma, 108. 



