INDEX. 



293 



Page 



Paraphyses of Lichens 48 



Parasites, Origin 7 



(See Cestoidea, Nematoidea, 



Trematoda, &c.) 

 Parthenogenesis (True) 194 



In Plants 199 



Pasteur, Spontaneous genera- 

 tion . - 4 

 Pectinibranchiata, Eeproduction 92 

 Pelagia, Direct development 130 n 

 Pelodytes, Hermaphroditism 94 n 

 Penetration of Spermatozoa 70 



Of Antherozoids 32, 34, 63 



Pentacrinus, Development 87 



Perichcetium of Moss 50 



Periodicity of Sex - 167 



Phanerogamia, Reproduction 29, 57 



Analogies with Crytogamia 60, 65, 

 180 



Tabular view 262 



Physalia, Medusoids - 125 



Physical Origin of Organic beings 2 

 Physosphoridse, Eeproduction 83, 118 



124 



Phytoids . . 10, 110 



Phytozoa, Phytozoaria, see 



Antherozoids. 



Pibularia, Reproduction 186 



Pike, Duplex embryos 159 



Pistillidium - 51 



Placenta of Salpa - 90 



Plants, see Vegetables. 

 Planaria, Multiple of embryos 227 

 Pluteus of Echinus - 85 



Pollen 22 



Polyembryony 184 



Polyphemus, Absence of Males 206 

 Polypifera, Reproduction 81, 117 



Tabular view 266 



Gradation of organs into 



zooids - - 124,174 



Page. 



Polypifera, PuUulation 147 



Polypidom, Composite nature 



of - - 110,149 



Polyzoa, Reproduction 87 



Tabular view . 267 



Embryonic gemmation 160 



Gamomorphic do. 170 



Pouchet, Experiments on 



Spontaneous Generation 3 



Proglottis - 132 



Prostate Gland, Homology 245 



Prostate Vesicle 244 



Prothallium 52, 182 



Protomorphic Stage - 14, 237 



Alternation . Ill 



Pullulation 147 



Representation - 156 



Protonema of Moss 50, 154, 188 n 



Protophyta, Reproduction 20 



Tabular view 31 



Protozoa, Distinction from 



Protophyta 75 



Reproduction 76 



Protracted fertility of Queen bee 204 

 Pringsheim, Reproduction of 



Algse . 27, et seq. 



Pteromalus, Supposed Alter- 

 nation - 136 

 Puccinia, Development 42 

 PuUulation, - 146 

 Formula - 218 

 Pupae . 105 

 Pycnidium of Lichen - 48 

 Pyrosotna, Development of Ovum 72 

 Quatrefages, Fission of Syllis 101 

 Incipient development of 



unimpregnated Ova 202 



Rabbit, Penetration of Sper- 

 matozoa 69 n 

 Radlkofer, Reproduction of 



Fungi - 43 n, 45 n 



