Prezygapophysis, 46 
Primitive groove, ro 
ova, 319 
streak, 10 
Primordial ova, 314 
Process, articular, 46 
transverse, 46 
Proccelous, 46 
Procoracoid, 107 
Proctodeum, 13, 206 
Pronephric duct, 312 
tubules, 311 
Pronephros, 310 
Prootic, 67 
Propterygium, 115 
Prosencephalon, 141 
Prostate glands, 342 
Prosternum, 58 
Proterandric hermaphroditism, 346 
Proteroglypha, 213 
Protocone, 214 
Protoconid, 214 
Protovertebrz, 14 
Protractor muscles, 131 
Proventriculus, 225 
Psalterium, 227 
Pseudobranch, 241 
Pseudoconch, 194 
Pterotic, 67 
Pterygoid bones, 69, 80 
muscle, 133 
Pterygoquadrate, 63, 69 
Pteryle, 32 
Ptyalin, 220 
Pubofemoralis muscle, 132 
Pubis, 109 ; 
Pulmonary arteries, 283 
circulation, 282 
veins, 292 
Pulmones, 236 
Pulp of tooth, 210 
Pupil, 202 
Pygostyle, 53 
Pyloric ceca, 227 
gland, 224 
Pylorus, 223 
Pyramidalis muscle, 130 
Pyramidal tracts, 150 
Pyriform lobes, 159 
Pyriformis muscle, 132 
Quadrate bone, 69, 74 
Quadratogugal bone, 70 
Quadritubercular, 214 - 
INDEX. ; 397 
Ramus intestinalis, 162 
of tenth nerve, 176 
lateralis accessorius, 173 
of tenth nerve, 176 
ventralis, 162 
visceralis, 162 
Rathke’s pocket, 148, 206 
Rectal gland, 228 
Rectum, 228 
Rectus abdominis muscle, 130° 
capitis muscles, 131 
muscles, 128, 130 
; of eye, 128 
Red spots, 249 
Reissner’s fibres, 151 
Renal artery, 286, 300 
corpuscle, 309 
portal system, 280 
Rennet, 227 
Respiration, accessory structures, 263 
mechanism of, 263 
Respiratory circulation, 282 
duct, 194 
organs, 235 
Reproductive ducts, 321 
organs, 308, 319 
Reptiles, see also Sauropsida, Amniotes. 
aortic arches, 283 
brain, 157 
circulation, 299 
_ copulatory organs, 344 
dermal skeleton, 41 
gill pouches, 244 
girdles, 107, 111 
glands, 30 
intestine, 229 
larynx, 251 
limbs, 118 
lungs, 258 
scales, 30 
skull, 87 
thymus, 246 
thyreoid, 247 
tongue, 217 
vertebral column, 52 
Rete mirabile, 249, 267 
Reticulum, 227 
Retina, 199 
Retinal artery, 201 
ganglion, 200 
layer of eye, 198 
vein, 201 
Retractor bulbi, 128, 203 
muscles, 131 ; 
