Phyllogorgia, 122. 

 Phyllonotus, 289. 

 Phyllophora, 153. 

 Phyllopoda, 350. 

 Phyllosoma, 334. 

 Phymactis, 114. 

 Phymanthus, 115. 

 Physa, 312. 

 Physalia, 99, 100. 



iadrc, loo. 

 ilopteridae, 185. 

 Physematium, 60, 02. 

 Physiology, 12. 



Physiological individuality, 25. 

 Physophora, 99, ioo. 

 Physophoridae, 98, ioo. 

 Phytocrinus, 130. 

 Phytophaga, 421. 

 Phytoptus, 373. 

 Pierida?, 412. 

 Pih'dium, 162. 

 Pinacobdella, 205. 

 Pinna, 268. 

 Pinnida?, 268, 357. 

 Pinnotheres, 152. 

 Piscicola, 198. 

 Pisidium, 259, 266, 270. 

 Pixinia, 65. 



Placobranchiata, 294, 300, 304. 

 Placospongia, 78. 

 Placuna, 266. 



ioma, 69. 

 Planacera, 160. 

 Planaria, 3, 160. 



:ida?, 160. 

 Planoblast, 187. 



, 289, 292, 312. 

 3'lanula, 37, 91. 

 Plastide, 5. 



urn, 58. 

 Platyblenna, 404. 



linia, 411. 



cza, 412. 



ccnc, 46. 



Rod, 355- 



Pleurae, 351, 385. 



. 



Plcurobranchiata, 305. 



, 289. 



Plcurobranchinse, 305. 



hus, 281, 305. 

 Plcun 

 Plcuroncma, 66. 



Index 



Pleurophyllidia, 288, 305. 

 Pleurophyllididse, 305. 

 Pleurotomaridae, 307. 

 Pleurotomidae, 308. 

 Pleurotrocha, 197. 

 1'lcxaurella, 122. 

 Plexaura, 122. 

 Plicaphora, 301. 

 Pliocene, 46. 

 Plotactis, 114. 

 Ploteres, 401. 

 Plumatellidas, 230. 

 Plumularia, 69, 95. 

 Plumulariadae, 94. 

 Pluteus, 125, 132. 

 Pneumatic filaments, 99. 

 Pneumatocyst, 99. 

 Pneumodermon, 275, 276, 27; 

 Pneumodermonidac, 279. 

 Podactinaria, 101. 

 Podobdella, 205. 

 Podocoryne, 92. 

 Podocor) r nida2, 92. 

 Podophrya, 54. 

 Podophthalmia, 362. 

 Podura, 391, 402. 

 Poduridae, 396, 402. 

 Poecilopoda, 337, 351. 

 Poecilopora, in, 115. 

 Polar province, 42. 

 Polfelder, 107. 

 Poli, 260. 

 Polia, 161, 162. 

 Polian vesicles, 129. 

 Polistes, 420. 

 Pollicipes, 345. 

 Polyarthra, 196. 

 Polybia, 420. 

 Polybranchiata, 294. 

 Polycampic, 168. 

 Polycelis, 158. 

 Polycera, 288. 

 Polyclinium, 234, 241. 

 Polyclinidce, 235. 



' adus, 160. 

 I'olyc-lonia, 104. 

 Polyclonidac, 104. 

 ttaria, 63. 



<-ric cpilht-liuni, 13. 

 Polydesmos, 378, 381. 



. }2O. 

 .ithu, 312. 



93- 



.inuq.liina, 50. 



2G 2 



151 



