INDEX. 



343 



Plastron, 32 



Pleura, 208, 264 ' 



Pleurodont dentition, 215 



Pleuronectidffi, asymmetry of head, 70 



Plexus choroidei, 136 



Plica semilunaris, 192 



Pluma, 22 



Pneumatic bones, 107, 262 



Poison-fangs, 215 



Polar cells, 3 



Polymastism, 28 ' 



Polypterus : olfactory organ, 172 ; horny 

 teeth, 214 ; external gills, 250 ; air- 

 bladder, 251, 252 



Polythelism, 28 



Precoracoid, 87, 89 



Prehallux, 109 



Premolars, 214, 216 



Prepollex, 109 



Prepuce, 330 



Pristiurus : number of vertebrae, 37 ; de- 

 velopment of fins, 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, 

 267 ; urinogenital organs, 313, 314 



Proto vertebrae, 9, 56 



Proventriculus, 233 



Psalterium, 236 



Pseudobranch, 250 



Pseudo-turbinal, 175 



Pterodactylus: abdominal ribs, 50; maims, 

 106 



Pterygopodium, 327 



Pubis, 9399 



Pulp-cavity, 213 



Pupil, 183, 188 



Purple, visual, 190 



Pyloric caeca, 229 



Pylori c portion of stomach, 234 



Pyramids of kidney, 308, 310 



Quill, 22 



Q. 



U. 



Radiale, 104 



Radii, of fins, 99 



Radius, 104 



Rana : alimentary canal, 232 ; liver and 



pancreas, 241 j larvngo-tracheal cartilages, 



254 



Ranodon : development of vertebral 



column, 40 



Rattlesnake, poison-apparatus, 221 

 Receptaculum 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 

 Rtia 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 



8. 



Sacci vasculosi, 138, 142 



Sacculo-cochlear canal, 198 



Sacculus, 195 



Saccus endolymphaticus, 205 



Salamandrina, development of vertebral 



column, 40 

 Salmonidie : intestinal valve, 229 ; ab - 



dominal pores, 267 

 Sarginse, teeth, 214 

 Scala vestibuli, tympani, and media, 193 



204 



Scales, 18, 32 

 Scapula, 8794 - 

 Scapus, 22 

 Scarf skin, 16 

 Scarus, teeth, 214 

 Schizocceles, 9 

 Sclerotic, 184 

 Scrotal sacs, 326 



Scyllium, number of vertebrae. 37 

 Segmental duct, 296, 303 

 Segmental sense-organs, 163 

 Segmentation of ovum, 4 

 Semicircular canals, 195 

 Seminal duct, 301 

 Seminal tubes, 327 

 Semnopithecus, number of caudal vertebrae, 



47 



Sense-capsules, 58 

 Sensory organs, 162207 



of integument, 163, 194 

 Sensory tubes and sacs, 166 

 Septum, interorbital, 57, 75 

 Septum, oblique, 259 

 Sesamoids, 110, 113 

 Shark, intestinal tract, 229 



