INDEX. 



343 



Plastron, 32 



Pleura, 203, 264 



Pleurodont dentition, 215 



Pleuronectidse, asymmetry of head, 70 



Plexus choroidei, 136 



Plica semilunaris, 192 



Pluma, -2-2 



Pneumatic bones, 107, 262 



Poison-fangs, 215 



Polar cells, 3 



Polymastism. 2S 



Polypterus : olfactory organ, 172 : horny 

 teeth, 214 ; external gills, 250 ; air- 

 bladder, 251, 252 



Polythelism, 2S 



Precoracokl. S7, 89 



Prehallux, 109 



Premolars, 214, 216 



Prepollex, 109 



Prepuce, 330 



Pristiurus : number of vertebrae, 37 ; de- 

 velopment of tins, 87 



Processus falciformis, 185 



Processus vermiformis, 236 



Prochordal cartilages, 57 



Pronation, 108 



Pronephric duct, 296, 303 



Pronephros, 296, 298, 302 



Pronucleus, male and female, 3, 4 



Proteus, eyes, 186 



Protocercal tail, 38 



Protoplasm, 3 



Protopterus : dermal denticles, 31 ; ver- 

 tebral column, 35 ; skull and pectoral 

 fin, 68 ; pelvis, 92 ; abdominal pores, 

 2 '.17 ; uriuogeiiital organs, 313, 314 



Protovertebnt, 9, 56 



Proventriculus, 233 



Psalterium, 236 



Pseudobranch, 250 



Pseudo-turbinal, 175 



Pterodaetvlus: abdominal ribs, 50; manus, 

 106 



Pterygopodium, 327 



Pubis, 9399 



Pulp-cavity, 213 



Pupil, 183) 188 



Purple, visual, 190 



Pyloric caeca, 229 



Pyloric portion of stomach, 234 



Pyramids of kidney, 308, 310 



Quill, 22 



Q. 



i;. 



Radiale, 104 

 Radii, of fins, 99 

 Radius, 104 



Kana : alimentary canal, 232 ; liver and 

 pancreas, 241 ; larvngo-tracheal cartilages, 



Ranodon : development of vertebral 



column, 40 



Rattlesnake, poison-apparatus, 221 

 Reeeptaculum chyli, 293 

 Rec3ssus cochleae, 197 

 utriculi, 196 

 vestibuli, 195 

 Rectum, 209, 228236 

 Reproduction of tail in Lizards, 43, 292 

 Resonance-cavities, 257 

 Respiratory organs, 245 265 

 Respiratory tube, 246 

 Rete Halleri, 327 

 Retia mirabilia, 292 

 Retina, 182, 189 

 Rhamphorhynchus, manus, 106 

 Rhinolophus, milk-teeth, 213 

 Ribs, 4851 

 Ribs, abdominal, 50 

 Rodentia, milk-teeth, 213 

 Rods of retina, 190, 191 

 Root-sheaths of hair, 24 

 Rostrum of skull, 58, 65 ' " 

 Ruminant stomach, 235, 236 



S. 



Sacci vasculosi, 138, 142 



Sacculo-cocblear canal, 198 



Sacculus, 195 



Saccus endolymphaticus, 205 



Salamandrina, development of vertebral 

 column, 40 



Salmon idae : intestinal valve, 229 ; ab- 

 dominal pores, '267 



Sarginae, teeth, 214 



Scala vestibuli, tympani, and media, 193 

 204 



Scales, IS, 32 



Scapula, 87 94 - 



Scapu- 



Seavf skin, 16 



Scarus, teeth, 214 



Schizocoales, 9 



Sclerotic, 184 



Scrotal sacs, 32*5 



Scyllium, number of vertebne. 37 



Segmental duct, 296, 303 



Segmental sense-organs, 163 



Segmentation of ovum, 4 



Semicircular canals, 195 



Seminal duct, 301 



Seminal tubes, 327 



Semuopithecus, number of caudal vertebrae, 

 47 



Sense-capsules, 58 



Sensory organs, 162 207 

 of integument, 163, 194 



Sensory tubes and sacs, 166 



Septum, interorbital, 57, 75 



Septum, oblique, 259 



Sesamoids, 110, 113 



Shark, intestinal tract, 229 



