394 INDEX-GLOSSARY. 



Protopterus, 153. 



Prototheria (Trpiros, first ; 0ijpt'oi>, a beast), 345. 



Protovertebne = Somites, mesodermic, q.v. 



Protozoa (Trpwrot , first ; tyov, a living creature) The simplest animals, 

 consisting each of one cell, 339 ; Chap. i. 7, 71. 



Proventriculus (pro, in front ; ventriculus, dim. of venter, the belly), in the 

 Pigeon The part of the stomach which secretes the gastric juice. It 

 precedes the gizzard, 242. 



Proximal (proximus, nearest, next) Nearest to the main body, 1 1 . 



Pseudobranch (-^'.t^tif, false; jSpay^/a, the gills of a fish), 166. 



Pseudonavicellse (^<vlfa ; navicella, dim. of navis, a ship), 18. 



Pseudopodium ($Mt ; veoliov, dim. of vroiis, a foot) A temporarily project- 

 ing, blunt lobe of protoplasm, 7, 10, 312. 



Pterygoid bar, 182. 



Pterylse, 229. 



Ptyalin (<r<rvKXov, spittle) A ferment, found in saliva, which converts 

 starch into grape-sugar, 289. 



Pulmonary Belonging to the lungs. See Respiration. 



Pupil, 174, 221. 



Pylangium (vuXv, a gate; ayyiiov, a vessel), in the Frog That part of the 

 truncus arteriosus which immediately succeeds the ventricle, 196. 



Pyloric Stomach : next the intestine, 91. 



Pylorus The valve between stomach and intestine, 190, 286. 



Pyramid Urinary, 295 ; of Brain, 302. 



Pyrenees, 349. 



Quill, 229, 230. 



R 



Rabbit Lepus, q.v. 



Racemose (racemus, a bunch or cluster of berries), 288. 



Radula (radula, a scraper) A horny, tooth-bearing ribbon, which forms 



part of the odontophore, 125. 

 Ramus (ramus, a branch) Of Nerves, 213, 215; of Mandible, 236, 276, 



325 ; r. communicans, 213, 215, 254, 303. 

 Rana, 343; 1-5, 135, 175-228. 

 Ranidse, 4. 

 Rat, 347, 349. 



Receptaculum R. ovorum = Ootheca, q.v. ; r. seminis = Spermotheca, q.v. 

 Rectrices (rectrix, fern, of reef or, a ruler, a steersman) Quill-feathers of 



the tail, 229. 



