INDEX. 



485 



QUADRATE, 161 

 Quadrato-jugal, 161 



RADIAL CANAL, 392 

 Radiolaria, 430 

 Radius, 74, 1 19 

 Rami communicantes, 97, 153 

 Rana, 137 



Ranvier, Nodes of, 90 

 Receptaculum ovorum, 344 

 Recessives, 218 

 Rectum, 16, 174, 330 

 Redia, 360, 361 

 Reduction divisions, 214 

 Reflex action, 92 

 Rejuvenation, 402, 403 

 Renal excretion, 64 

 Repetition of similar parts, 65 

 Reproduction, Asexual, 41, 382 



of protozoa, 41, 403 



, Sexual, 121, 156, 188, 

 204, 212, 228, 247, 



261,320,333, 343,383,403 

 Reptilia, 450 

 Respiration, 34, 141, 174, 207, 240, 



259, 265, 294, 314, 329, 340 

 Restiform bodies, 185 

 Retina, 115, 116, 276 

 Retinula, 319 

 Rhabdocoelida, 436 

 Rhabdom, 319 

 Rhizopoda, 412, 429 

 Rhyncocephalia, 451 

 Ribs, 66, 68, 126, 127, 180 

 Rods, 116 

 Rostellum, 367 

 Rostral, 182 

 Rostrum, 302 



QACCULUS, 114, 154, 187 



k5 ,, rotundas, 16, 19, 58 



Sacral vertebrae, 70, 75, 148 



Saliva, 14 



Sarcolemma, 85 



Sarcous rods, 86 



Sauropsida, 453 



Scaphognathite, 305 



Scapula, 73, 148 



Schizogony, 419, 424 



Sclerites, 302 



Sclerotic, 115 



Scolex, 373 

 Scorpionida, 443 

 Scyllium, 169 

 Secretion, 13 

 Secretory nerves, 91 

 Segmental duct, 238 

 Segmentation, 214, 220, 228, 248,262 

 cavity, 222, 229, 249 



,, , Metameric, 65 

 Semicircular canals, 113 

 Seminal vesicle, 156, 189, 204 

 Sense-organs, 91, 111, 154, 187, 202, 



225, 275, 318, 333, 342 

 Sensory tubules, 171, 187 

 Septa, 338 



Serous membrane, 259 

 Sesamoid bones, 77 

 Seta), 302, 337 



Sexual characters, Secondary, 290 

 ,, dimorphism, 290 

 ,, selection, 290 

 Shell, 248, 325 

 Shoulder-girdle, 72, 148, 183 

 Sinuses, 178, 314 



Sinus venosus, 142, 175 



Sipunculoidea, 499 



Skeleton, 65, 147, 179, 200, 272 

 302, 325, 338, 377, 400 



Skin, 50, 59, 137, 157, 225 

 -teeth, 170 



Skull, 77, 134, 164, 180 



Slipper animalcule, 399 



Smell, 112 



Soaps, 18 



Solenocytes, 347 



Soma, 285 



Somatic cells, 274 

 ,, mesoblast, 226 



Somato-plasm, 384 



Somites, Mesoblastic, 226, 235, 252, 

 264, 336 



Specialized characters, 282 



Species, 130 



Spermary, 122 



Spermatozoa, 122, 124, 213, 320, 

 344,384 



Sperm-blastophor, 345 



Spermiduct, 122 



Sperm-sacs, 189 



Spermoblast, 344 



Spermospores, 344 



Spermothecse, 344 



Sphenethmoid, 161 



