INDEX. 



509 



Renal organs (see Excretory organ 



and Kidney) 

 Renal vessels, Snail, 295 



Reno-pericardial aperture; Mus- 

 sel > 3H, 335! duct, Snail, 275, 

 284 



Reproduction, Amoeba, 373 ; Cray- 

 fish, 187; Earthworm, 247;Frog, 

 5: Hydra, 343; Mucor, 423; 

 Mussel, 312 ; Snail, 277 ; Spiro- 

 gyra, 400, 406; Vorticella, 362 



Reproductive organs, Bean, 465 ; 

 Chara, 433 ; Crayfish, 186, 217 ; 

 Earthworm, 246, 268; Eurotium, 

 419 ; Fern, 449, 456, 458 ; Frog, 

 23' Si; Hydra, 349, 357; Mu- 

 cor, 421, 423 ; Mussel, 312, 320 ; 

 Penicillium, 419 ; Snail, 276, 289 



Respiration, Bean, 469 ; Crayfish, 

 183 ; Earthworm; 245 ; Frog, 3, 

 22 ; Mussel, 308 ; Snail, 275 ; 

 Yeast, 383 



Respiratory organs, Crayfish, 182, 

 207, 221 ; Frog, 21, 48 ; Mussel, 

 307, 322 ; Snail, 275, 282 



Restiform body, 25 



Retina, 33, 118; development of, 

 172 ; histology of, 141 



Retinula, 234 



Rhabdome, 185, 234 



Rhinal process, 13, 64 



Rhinencephalon, 97 



Rbizoid, 431 



Rhizome, 443 



Root, Bean, 460, 465, 470 ; Fern, 

 448, 452, 456 



Root-cap, 448, 402, 471 



Root-filaments, Chara, 430 



Root -hairs, 448, 449, 458, 465 



Root-pressure, 469 



Rostrum, 190, 238 

 S. 



Sac (see Cell-wall) 



Saccharomyces, 377 — 388 



Sacculus, 33, 120 



Sacrum, 57 



Salivary duct, Snail, 285, 288 ; 

 gland, Earthworm, 242 ; Snail, 

 285 



Scalariform vessels, 446, 455 



Scaphognathite, 174, 182 



Scapula, 69 



Schizomycetes, 408 — 414 



Sclerenchyma, 446, 453, 454, 472 



Sclerotic, 33, 117 



Secondary thickening, 464 



Secundine, 478 



Seed, 479 



Segmental duct, 169 ; organ, 244, 



251, 252, 256 

 Segmentation, cavity, 166 ; of 

 ovum, Crayfish, 187, 235 ; 

 Earthworm, 247 ; Frog, 5, 158, 

 165; Mussel, 312; Snail, 278, 

 302 

 Selaginella, 466 

 Seminal receptacle (see Sperma- 



theca) ; vesicle, 246, 268 

 Sense-organs, Earthworm, 246 ; 



Hydra (see Cnidocil) 

 Sepal, 476 



Septum narium, 13, 66, 11 r 

 Seta, Crayfish, 203 ; Earthworm, 

 241, 249, 251, 266; sac of, 251, 

 266 

 Sex-organs (see Reproductive 



organs) 

 Sexual generation, Fern, 457 

 Sexual reproduction, 400, 402, 



419, 423 

 Shell (see Exoskeleton) 

 Shell-teeth, 340 

 Shoulder-girdle, 68 

 Sieve-tubes, Bean, 464, 469, 473 ; 



Fern, 447, 454, 455 

 Sinus venosus, 17, 81, 90 

 Siphonal tentacles, 317 

 Siphons, 307, 317 

 Skeleton, Crayfish, 173, 189; Frog, 



", 55 

 Skin, Frog, histology of, 145 

 Skull, 12 



Small intestine, 10, 15, 39, 45 

 Snail, 272 — 304 

 Somite, 174, 177, 240, 248 

 Sooty corpuscles, 356 

 Sorus, 444 

 Spermatheca, 250, 268, 292 



