INDEX 



621 



544, 557,55^ ; circulatory organs, 

 520, 544, 545-547, 55o~554'^ 

 nervous system, 528, 544, 549, 

 554 ; sense-organs, 533, 552- 

 556 ; urinogenital organs, 537 , 

 545,548 ; development, 541, 581, 

 5 8 3, 594, 596, 601, 605 



Racemose, 135 



Radial canals, see Canals 



Radial symmetry, 296 



Radio -ulna, 49 



Radius, 50, 501 



Rana esculenta, 216 



RANA TEMPORARIA, see Frog 



Ranidae, 218 



Reagents, hardening, preserving, 

 mounting, and staining, 135 



Recapitulation, theory of, 224 



Rectal gland, 447 



Rectum, 23 ; and see Enteric 

 canal 



Reducing division, 566, 569 



Reflex action, 169, 319 



Regeneration, 307, 345 



Renal portal system, see Portal 

 system 



Reproduction, 8, and see under 

 various types, and also Asexual 

 reproduction 



Reproductive organs, 23, 25, 193, 

 307, 320, 345, 382, 409, 421, 

 425, 467, 538 



Reptilia, 219, 418 



Respiration, 141, 144, 235, 339, 



374, 448, 517 



Respiratory movements, 7, 142, 



375, 520 



Retina, 183, 184, 354, 55^ 



Retinula, 380 



Rhabdome, 380 



Rhinencephalon, 586 



Rhizopoda, 292 



Ribs, 486, 497, 500 



Rocks, sedimentary and stratified, 



223 



Rodentia, 542 

 Rods and cones, 185 

 Rostrum, 363, 436 

 Rudiment, often used for Vestige 



(q.v.) 



s. 



_)acculus, 187 

 Sacculus rotundus, 515, 546. 

 Sacrum, 38, 499 

 Salamander, 218 

 Salivary glands, see Glands 

 Saprophytic nutrition, 256, 257 

 Sarcolemma, 112 

 Scales, 430, 434 

 Scapula, 46, 443, 500 

 Schizoccele, 584 

 Sclerite, 390 

 Sclerotic, 182, 534,555 

 Scrotal sac, 487, 538, 548 

 SCYLLIUM, see Dogfish 

 Sebaceous glands, see Glands 

 Section-cutting, directions for, 126, 



o 138 . 



Secretion, 130 



Segment, see Metamere, Podomere 



Segmentation-cavity, 200, 574, 580 



Segmentation of oosperm, 198, 200, 



212, 308, 320, 349, 383, 410, 470, 



572 



Segmentation, equal and unequal, 

 573; discoid, 573 

 ,, superficial, 383, 573 



,, metameric, see Me- 



tamere 



,, -nucleus, 571 



Selection, natural and artificial, 226, 



227 



Self-fertilization, 348 

 Seminal funnel, 347 



vesicle, 194, 347, 467 

 Sense-organs and cells, 179, 315, 

 344, 351, 380, 409, 424, 432, 



464, 533, 587 

 Septa, of earthworm, 333 

 Septum : lucidum, 531 ; nasal, 42, 



493 ; interorbital, 487 

 Serous membrane of embryo, 597, 



60 1 



Sesamoid bones, 502-505 

 Seta, 328, 350, 352, 362 

 Sex-cells, primitive, 566 

 Sexual characters, external, 7, 382, 



433, 486 

 Sexual generation, see Gamobium 



