Index 



■t5i 



Phyllogorgia, 122. 

 Phyllonotus, 289. 

 Phyllophora, 153. 

 Phyllopoda, 350. 

 Phyllosoma, 334. 

 Phymactis, 114. 

 Phymanthus, 115. 

 Physa, 312. 

 Physalia, 99, 100. 

 Physaliadae, 100. 

 Physalopteridse, 185. 

 Physematium, 60, 62 . 

 Physiology, 12. 



Physiological individuality, 25. 

 Physophora, 99, 100. 

 Physophoridae, 98, lOO. 

 Phytocrinus, 130. 

 Phytophaga, 421. 

 Phytoptus, 373. 

 Pieridae, 412. 

 Pilidium, 162. 

 Pinacobdella, 205. 

 Pinna, 268. 

 Pinnidse, 268, 357. 

 Pinnotheres, 152. 

 Piscicola, 198. 

 Pisidium, 259, 266, 270. 

 Pixinia, 65. 



Placobranchiata, 294, 300, 304. 

 Placospongia, 78. 

 Placuna, 266. 

 Plagiotoma, 69. 

 Planacera, 160. 

 Planaria, 3, 160. 

 Planariidse, 160. 

 Planoblast, 187. 

 Planorbis, 289, 292, 312. 

 Planula, 37, 91. 

 Plastide, 5. 

 Platoum, 58. 

 Platyblenna, 404. 

 Platyclinia, 411. 

 Platypeza, 412. 

 Pleistocene, 46. 

 Pleopod, 355. 

 PleuHB, 351, 385. 

 Pleurobrachia, 107. 

 Pleurobrachidae, 108. 

 Pleurobranchiata, 305. 

 Pleurobranchisea, 289. 

 Pleurobranchinse, 305. 

 Pleurobranchus, 281, 305. 

 Pleurocysta, 142. 

 Pleuronema, 66. 



Pleurophyllidia, 288, 305. 

 Pleurophyllididae, 305. 

 Pleurotomaridse, 307. 

 Pleurotomidse, 308. 

 Pleurotrocha, 197. 

 Plexaurella, 122. 

 Plexaura, 122. 

 Plicaphora, 301. 

 Pliocene, 46. 

 Plotactis, 114. 

 Ploteres, 401. 

 Plumatellidse, 230. 

 Plumularia, 69, 95. 

 Plumulariadoe, 94. 

 Pluteus, 125, 132. 

 Pneumatic filaments, 99. 

 Pneumatocyst, 99. 

 Pneumodermon, 275, 276, 27! 

 Pneumodermonidae, 279. 

 Podactinaria, lor. 

 Podobdella, 205. 

 Podocoryne, 92. 

 Podocorynidce, 92. 

 Podophrya, 54. 

 Podophthalmia, 362. 

 Podura, 391, 402. 

 Poduridae, 396, 402. 

 Poecilopoda, 337, 351. 

 Poecilopora, iii, 115. 

 Polar province, 42. 

 Polfelder, 107. 

 Poll, 260. 

 Polia, i6r, 162. 

 Polian vesicles, 129. 

 Polistes, 420. 

 Pollicipes, 345. 

 Polyarthra, 196. 

 Polybia, 420. 

 Polybranchiata, 294. 

 Polycampic, 168. 

 Polycelis, 158. 

 Polycera, 288. 

 Polyclinium, 234, 241. 

 Polyclinidae, 235. 

 Polycladus, 160. 

 Polyclonia, 104. 

 Polyclonidae, 104. 

 Polycyttaria, 63. 

 Polyderic epithelium, 13. 

 Polydesmus, 378, 381. 

 Polyergus, 420. 

 Polygnatha, 312. 

 Polymeric, 93. 

 Polymorphina, 50. 



