296 



INDEX 



Oocyte, 117, 123 



Ookinete, 184 



Oosperm, 232, 281 



Opisthocoelous vertebrae, 22 



Ophthalmic branch of 5th nerve, 66 



Optic capsules, 26 



Optic chiasma, 65 



Optic lobes, 62 



Optic nerves, 65 



Optic thalami, 62 



Orbital cavity, 28 



Order, 284 



Organ, 6 



Organic continuity of cells, 212, 245 



Organisation of protoplasm, 77, 79 



Origin of muscle, 21 



Os cruris, 33 



Os magnum, 37 



Ossification, in cartilage, 107 



in membrane, 106 



Osteoblasts, 106 

 Osteoclasts, 107 

 Osteogenic fibres, 106 

 Otocysts, 275 

 Otoliths, 71 

 Ovarian veins, 54 

 Ovaries, 43, 44, 265 

 Oviducts, 44 

 Ovum, 44, 117, 123, 247 

 Oxygen, 8, 45, 190 

 Oxyntic cells, 87 



Palate, 19 

 Palatine bone, 27 

 Palatine nerve, 66 

 Pancreas, 40, 87 

 Pancreatic duct, 41 

 Pandorina morum, 206 

 Paraglycogen, 167 

 Paramecium aurelia, 215 



brirsaria, 216 



-caudatum, 215 



Paramceba eilhardi, 142 

 Paramylum, 190 

 Parasitism, 161 

 Parasphenoid bone, 27 

 Parietal cells, 87 

 Parthenogonidia, 212 

 Pathetic nerve, 65 

 Pavement epithelium, 83 

 Pelomyxapalustris, 135, 137 



Pelvic girdle, 32 



Pelvic vein, 55 



Pelvis, 32 



Pentadactyla, 35, 72 



Pericardial cavity, 45 



Pericardium, 45 



Perilymph, 71 



Perimysiurn, 95 



Periosteum, 107 



Peristome, 217 



Peristomial groove, 234 



Peritoneal fluid, 39 



Peritoneum, 38 



Peritricha,) 234 



Permanent vacuoles, 130 



Peroneal nerve, 61 



Perradial axis, 275 



Pes, 17 



Phagocytosis, 76 



Phalanges, 32, 34 



Phylum, 19, 284 



Physiological division of labour, 



no 



Physiology, 10 

 Phytomastigoda, 205 

 Pineal eye, 63 

 Pineal gland, 62 

 Piroplasma bigemimim, 185 



caniS) 1 86 



equi, 1 86 



Plain muscle fibre, 94 

 Plants, characters of, 4 

 Planula, 280 

 Plasma, 73 

 Plasma cells, 100 

 Plasmatic cones, 151 

 Plasmodium, 154 

 Plasmodiitm immaculatum, 1 80 



malaria, 180 



vivax, 180 



Plastids, 262 



Plastin, 151 



Plastogamy, 149, 159 



Pleuroperitoneal cavity, 38 



Pn ?umogastric nerve, 67 



Polar bodies, 118, 123, 152, 181 



Polar plates, 151 



Polymorphism, 281 



Poly f of n a uvella, 201 



Portal veins, 56 



Post-axial structures, 36 



