INDEX. 



343 



Plastron, 32 



Pleura, 208, 264 ; 



Pleurodont dentition, 215 



Pleuronectidae, asyinnictry of head, 70 



Plexus choroidei, 136 



Plica semiluuaris, 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 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, 

 267 ; urinogenital organs, 313, 314 



Protovertebrai, 9, 56 



Proventriculus, 233 



Psalterium, 236 



Pseudobranch, 250 



Pseudo-turbinal, 175 



Pterodactylns: abdominal ribs, 50; maims, 

 106 



Pterygopodium, 327 



Pubis, 9399 



Pulp-cavity, 213 



Pupil, 183, 188 



Purple, visual, 190 



Pyloric cseca, 229 



Pyloric portion of stomach, 234 



Pyramids of kidney, 308, 310 



Quill, 22 



Q. 



It. 



Radiale, 104 

 Radii, of fins, 99 

 Radius, 104 



liana : alimentary canal, 232 ; liver and 

 pancreas, 241 ; kryngo- trachea! cartilages, 



Ranodon : development of vertebral 



column, 40 



Rattlesnake, poison-apparatus, 221 

 Reeeptaculum chyli, 293 

 Recessus cochleae, 197 

 utricnli, 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 



Rhamphorhynehus, manus, 106 | 

 Rliinolophus, milk-teeth, 213 

 Rilis, 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 



Saeculo-cochlear canal, 198 



Sacculus, 195 



Saccus endolymphaticus, 205 



Salamandrina, development of vertebral 

 column, 40 



Salmonidae : 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 vertebne, 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, 162 207 

 of integument, 163, 194 



Sensory tubes and sacs, 166 



Septum, interorbital, 57, 75 



Septum, oblique, 259 



Sesamoids, 110, 113 



Shark, iuteatinal tract, 229 



