INDEX. 



509 



Renal organs (see Excretory organ 

 and Kidney) 



l-venal vessels, Snail, 295 



Reno-pericardial aperture ; Mus- 

 sel, 32^, 335; duct, Snail, 275, 

 28 + 



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, 

 23,51; 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 



Restiiorm body, 25 



Retina, 33, 118; development of, 

 172 ; histology of, 141 



Rhinal process, 13, 64 



Rhinencephalon, 97 



Rhizoid, 431 



Rhizome, 443 



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

 448, 452, 456 



Root-caj), 448, 462, 471 



Root-filaments, Chara, 430 



Root-hairs, 448, 449, 458, 465 



Root-pressure, 469 



Rostrum, 190, 238 



S. 



Sac (see Cell -wall) 



Saccharomyccs, 377 — 388 



Sacculus, 33, 120 



Sacrum, 57 



vSalivary duct. Snail, 285, 2S8 ; 



gland, Earthworm, 242 ; Snail, 



285 



Scalariform vessels, 446, 455 



Scaphognathite, 174, 182 



Scapula, 69 



Schizoniycctes, 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, 15S, 



165; Mussel, 312; Snail, 27S. 



302 

 Selaginella, 466 

 Seminal receptacle (see Sperma- 



theca) ; vesicle, 246, 268 

 Sense-organs, Earthworm, 246 ; 



Hydra (see Cnidocil) 

 Sepal, 476 



vSeptum narium, 13, 66, iir 

 Seta, Crayfish, 203 ; Earthworm, 



241, 249, 251, 266; sac of, 2^1, 



266 

 Sex-organs (see Reproductive 



organs) 

 Sexual generation. Fern, 457 

 Sexual reproduction, 400, 402, 



419. 4'-J3 

 Shell (see Exoskeleton) 

 Shell-teeth, 340 

 Shoulder-girdle, 68 

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



Fern, 447, 454, 455 

 Sinus venosus, 17, 8r, 90 

 Siphonal tentacles, 317 

 .Siphons, 307, 317 

 Skeleton, Crayfish, 173, 189; Frog, 



ii» 55 

 Skin, Frog, histology of, 145 

 Skull, 12 



Small intestine, 10, 15, 39, 45 

 Snail, 272 — 304 

 Somite, 174, 177, 240, 248 

 vSooty corpuscles, 356 

 Sorus, 444 

 Spermatheca, 250, 268, 292 



