266 



Otic vesicle. 

 Otic vesicle, 190. 

 Ovary, 88. 

 Oviscapt, 88. 

 Owen, Professor, 13, 24, 35, 102. 



INDEX. 



/ 



Pancreas, 15. 



Parasitism in Vertebrata.'xlii. 



— in Mollusca, Ixsxvi. 



in Nematelminthes, cxxxvi. 



— in Gregarinae, clxi. 



— entails morphological degradation, 



xi. 

 Parker, Mr. W. K., 39. ^ 



Parosteal bones, 36. 

 Parovarium, xxxv. 

 Patagia, 78. 

 Paxillae, 142. 

 Pecten, liv, Ix; 191. 

 Pectoral muscles, 13. 



— muscle, second, in birds, homology 



of, 179. 

 Pedicellariae, 14 a. 

 Pelodytes, cxxxv. 

 Pelvis in Birds, 28, 29. 



— in Reptiles, Ivii. 

 Peneus, 115. 

 Penguin, 1. 



Perca fluviatilis, 40-45. 

 Perennibranchiate Amphibia, Ixvii. 

 Perichaetous Annelides, 125, 126. 

 Peripatus, 156. 



Periplaneta orientalis, 86, 112 ^ 

 Petromyzontidae, Ixxviii, Ixxxiii. 

 Phalaena, 109. 

 Pharyngobranchii, Ixxxiv. 

 Pharyngognathi, Ixxv. 

 Pharynx, externally villous in earth- 

 worm, 124. 



— in leech, 129. 

 Phascolosoma, cxxxi ; 153. 

 Phoroiiis, 138. 



Phrenic nerve, 171. 



Phylactolaematous Polyzoa, ci. 



Phyllopoda, 112. 



Physoklisti, Ixxxiii. 



Physostomi, Ixix, Ixxxiii ; 46. 



Pipa, Ixiii. 



Pisces, Ixviii, Ixxxv. 



Plagiostomi, Ixix; 46. 



Planaria, 154. 



Planula, clx. 



Platyebninthes, cxl ; 138, 1 54, 240. 



Plectognatbi, Ixxv. 



Polian vesicles, 149. 



Polychaeta, cxxviii. 



Polymorphismus, 162. 



Pol3T)terus, Ixxiii. 



Polyzoa, ci; 7i-73. m> ^S^- 



Eeproduction. 

 PontobdeUa, 128. 

 Porifera, clxvi. 

 Portal system of Vertebrata, xxxiv. 



— rudimentary, Isxxv. 

 Priapulaceae, cxxxi. 

 Privet Hawk-Moth, 82. 

 Processus uncinati, li ; 20, 26, 27- 

 Proglottis, 136. 



Prolegs, 64. 



Proscolex, 136. 



Proteus, Ixiii. 



Protisticum Eegnum, clxiii. 



Protoplasm, clx. 



Protozoa, clx. 



Protula, cxx. 

 - Pseudhaemal vessels, cxxiv, cxlv ; 122, 

 124, 149. 



Psittacidae, U. 



Psolus, 146. 



Pteropoda, xciii. 

 , Pterylography, xlix. 



Ptilocercus, xliv. 



Pupa, 73, 76. 



Pyloric coeca in Fishes, Ixxii ; 40. 



— in Orthoptera, 86. 



portion of stomach in Reptiles, Iviu. 



Quadrate bone, 18; 38, 43. 

 Quekett, 46. 



E. 



Rabbit's vertebrae, 10. 



Radiolaria, clxii. 



Rana, 35-46, 181-185. 



Rasores, 20, 25, 29. 



Rat, 1-9, 167-173. 



Ratitae, liii, liv. 



Rathke, 106, 107. 



Recurrent nerve, 133. 



Reichert, Professor, 163. _ 



Regnum Protisticum, clxii. 



Renal-portal system, lii, lix, Ixiv; 177, 



181, 183. 

 Renforcement, ganglions de, 132. 

 Reproduction in Fishes, Ixxix. 



— in Amphibia, Ixvi. 



— in Mollusca, Ixxxyi. 



— in Arthropoda, cvi. 



— in Vermes, cxxv. 



— in Echinodermata, cxlv. 

 — • in Coelenterata, clvii. 



— in Protozoa, clxi. 

 Reproduction of lost organs in Coelen 



terata, clx. 



— in Echinodermata, 143. 



— in Amphibia, IxNni. 



in Arachnida and Crustacea, cxvii. 



