332 



INDEX 



Peritoneum (syn. peritoneal epithelium), 



48, 53, 227, 232 

 Perivitelline space, 45, 77 

 Permeability, cell, 104 

 Pfliiger's law, 88 



Pharyngeal cavity (see under Cavity) 

 Pharyngeal fold, 180, 253 

 Pharynx, 133, 135, 143, 144, 148, 149, 

 150, 151, 152, 158, 162, 164, 

 165, 168, 184, 194, 198, 200, 

 208, 237, 244 

 Pigment, 25, 47, 57, 80, 88, 95, 96, 115, 



225 

 Pigmented layer of the eye {see under 



Eye) 

 Pineal body or gland {see also Epiphysis), 



164 

 Pit, polar body {see under Polar body) 

 Pituitary, anterior, 32, 37, 40, 48, 67, 70, 

 141, 163, 165, 244 

 posterior {see Pars nervosa) 

 Placode {see specific placode) 

 Planaria, 14 

 Plane, cleavage, 81 

 determination of. 87 

 median sagittal, 84, 87 

 penetration path, 82 

 Planes for sectioning, 9 

 Plasm, germ, 13 



somato {seeSom&) 

 Plate, anal, 206 



basilar, 214, lU, 249 

 cutis {see Dermatome) 

 ethmoid, 274. 216 

 gill {see Gill anlage) 

 hypobranchial, 244 

 intranasal {see Plate, ethmoid) 

 medullary {syn. neural plate), 26, 27, 

 105, 109, 114, 115, 123, 125, 

 126, 135, 137, 182 

 neural (see Plate, medullary) 

 optic, 130 

 oral {syn. oral membrane), 142, 168, 



193 

 parachordal, 214, 259 

 segmental {see Epimere) 

 sense, 705, 127, 130,251 

 stapedial {see Stapes cartilage bone) 

 velar, 795, 245 



ventral {see Mesoderm, lateral plate) 

 vertebral {see also Epimere) 



Plectrum {see Columella) 

 Pleuro-peritoneal cavity {see under Cav- 

 ity) 

 Plexus, brachia, 186, 270 



ischio-coccygeal, 188 



lumbosacral, 186 



sciatic, 186, 270 

 Point, sperm entrance, 80, 111 

 Polar body, 69, 71, 76, 78, 79, 81, 83 



pit of, 77, 78 

 Polarity {syn. gradient), 64, 83, 85 



cell, 104 

 Pole, animal {see Hemisphere, animal) 



vegetal {see Hemisphere, vegetal) 

 Polyspermy, 74 

 Porter, K. R., 64, 79 



Pouch, branchial {syn. gill pouch), 143, 

 144, 194, 795, 195 



hyomandibular {see also Tube, Eusta- 

 chian) 



visceral, 707, 133, 143, 144, 194, 195, 

 196 

 Precoracoid (^ee Epicoracoid) 

 Predetermination, 1 



Preformationism {syn. emboitement, en- 

 casement theory), 5, 6, 12, 13 

 Pre-maxillary bone, 275, 216 

 Preoptic area, 40 

 Pressure, 25 

 Prevost, 6 

 Primitive gut {see Archenteron; Intestine; 



Gut) 

 Primitive streak, 134 

 Process, bony, 213 



of skull {see under Skull) 



maxillary, anterior, 275 

 posterior, 275 



transverse, 213 

 Proctodeum {see also Anus), 98, 729, 132, 

 134, 135, 141, 143, 144, 145, 

 149, 158, 164, 189, 192, 193 

 Pronephric capsule, 220, 221 

 Pronephric chamber {see ///u/er Chamber) 

 Pronephric duct {see under Duct) 

 Pronephric region, 729, 130 

 Pronephric shelf, 219 

 Pronephric tubule, 148, 149, 152, 195 

 Pronephros {syn. head kidney), 705, 132, 

 750, 219, 220, 247, 251, 252, 259 

 Prootic cartilage bone, 216 

 Prootic foramen, 275 



