Paraphyses of Lichens 

 Parasites, Origin 



(See Cestoidea, Nematoidea, 

 Trematoda, &c.) 

 Parthenogenesis (True) 19 i 



In Plants - 199 



Pasteur, Spontaneous genera- 

 tion - - 4 

 Pectinibranchiata, Reproduction 92 

 Pelagia, Direct development 130 n 

 Pelodytes, Hermaphroditism 94 n 

 Penetration of Spermatozoa 70 



Of Antherozoids 32, 34, 63 



PentacrinuSy Development 87 



Perichoetium of Moss 50 



Periodicity of Sex - 107 



Phanerogamia, Reproduction 29, 57 



Analogies vsith Crytogamia 60, 65, 



180 



Tabular \^ew • 262 



Physalia, Medusoids - 125 



Physical Origin of Organic beings 2 

 Physosphoridae, Reproduction 83, 118 



124 

 Phytoids - . 10, 110 



Phytozoa, Phytozoaria, see 



Antherozoids. 

 Pilularia, Reproduction 186 



Pike, Duplex embryos 159 



Pistillidium - 51 



Placenta of Salpa • 90 



Plants, see Vegetables. 

 Planaria, Multiple of embryos 227 

 Pluteus of Echinus - 85 



PoUen - - 22 



Polyembryony . 181 



Polyphemus, Absence of Males 206 

 Polypifera, Reproduction 81, 117 



Tabular view - 266 



Gradation of organs into 



zooids - - 124,174 



INDEX. 



Pago. 



4« 



7 



Polypifera, Piillulation 

 Polypidom, Composite nature 



293 

 117 



of 



Polyzoa, Reproduction 



Tabular view 



Embryonic gemmation 



Gamomorf>hic do. 

 Pouchet, Experiments on 

 Spontaneous Generation 

 Proglottis 



Prostate Gland, Homology 

 Prostate Vesicle 

 ProthalUum 

 Protomorjihic Stage 



Alternation 



Pullulation 



Representation 

 Protonema of Moss 



110,119 

 87 



2G7 

 IGO 

 170 



3 



132 



245 



24t 



52, 182 



14, 237 



111 



1 17 



15(> 



50, 154, 188 n 



2<> 

 31 



76 



Protoph}^^, Reproduction 



Tabular view- 

 Protozoa, Distinction from 



Protoph}'ta 

 Reproduction 

 Protracted fertility of Queen bee 2C^l 

 Priugsheim, Reproduction of 



Algfo . 27, et scq. 



Pteromalus, Supposed Alter- 

 nation - - 136 

 Puccinia, Development 42 

 Pullulation, - - IkJ 



Formula - 218 



Pupae - . 105 



Pycnidium of Lichen - 4S 



Pyrosoma, Development of Ovmn 72 

 Quatrefages, Fission of Sijllis Id 

 Incipient development of 



unimpregnatod Ova 

 Rabbit, Penetration of Sj>er 



matozoa 

 Radlkofer, Reproduction of 



Fungi - - 43 n, 45 r» 



202 



69 n 



