Index 



605 



S. 



_)acculus, 187 n' 



Sacculus rotundus, 497, 498, ^sg 

 Sacrum, 482 

 Salamander, 218 

 Salivary glands, see Glands 

 Saprophytic nutrition, 256, 257 

 Sarcolemma, H2 

 Scales, 414, 418 

 Scapula, 46, 427, 483 

 Schizocoele, 565, j'i'7 

 Sclerite, 3y6 

 Sclerotic, 182, 517, 571 

 Scrotal sac, 470, 521 

 ScYLLlUM, see Dogfish 

 Section-cutting, directions for, 126,' 



138 



Secretion, 130 



Segment, see Metamere, Podomere 

 Segmentation-cavity, 200, 558, 562 

 Segmentation of oosperm, 198, 200, 



212, 303, 313, 346, 369,5*^ 

 Segmentation, equal and unequal, 

 556 ; discoid, 556 

 ,, superficial, 369, 556 



,, metameric, see Me- 



taniere 

 -nucleus, '554 

 Selection, natural and artificial, 226, 



227 

 Self-fertilization, 339 

 Seminal funnel, 338 



„ vesicle, 194, 338, 451 

 Sense-organs and cells, 179, 308, 



312, 335, 414, 416, 448, 516 

 Septs, of Karthworm, 325 

 Septum: lucidum, 514; nasal, 42, 



476 , 



Serous membrane of embryo, 579, 



583 



Sesamoid bones, 485, 487, 488 

 : Seta, 320, 348, 367 



Sexscells, primitive, 549 

 (Sexual characters, external, 7, 368, 



417, 469 r. ^■ 



Sexual generation, see Gamobium 

 Sexual organs, see Reproductive 

 ■ organs 



Sexual reproduction, see under 



various types' 

 Shank, 5 



Shell, 381 ; larval, 395 

 Shell of egg, 453 

 ShelJ-glaiid of Mussel-embryo, 395 ; 



of Dogfish, 453 

 Shoulder-girdle, see Pectoral arch ' 

 Sinus : blood, 360, 362, 364, 438, 



441 ; lymph, 18, 27 ; urinary and 



urinogenitaL 451 ; venosus, 80, 89 

 Siphon, inhalant and exhalant, 382 > 

 Skeleton, see Endo- and Exo- 

 , skeleton , . , 



Skin, see Integument 

 Skull; Frog, 16, 35,, 39; Dogfish, 



420 ; Rabbit, 470 ; development 



of, 576 

 Smell, organ of, see 'Olfactory organ 

 Snout, 4 ' 



Somatic layer of mesoderm, 561 

 Somatopleure, 561 ' 



• Spawn, 9 

 Species, 215. «< je^. ; origin of, 222, 



225 

 Sperm, or spermatozooid, 194, 368, 



549 ; and see under various types 

 Spermary, 25, 193, 194 ; and see. 



Reproductive organs 

 Spermatogenesis, 194, 548 

 Spermatophore, 368 

 Spermotheca, 338 

 Sperm-reservoir, 338 

 Sperm-sac, 338, 451 

 Spinal cord, 28, 155, 443, 515 

 Spiracle, 4r6, 433 

 Splanchnic layei: of mesoderm, 561 

 Splanchnopleure, ''562 ' 

 Spleen, 23, 98, 431, 499 

 Spontaneous generation, see Abio- 



genesis 

 Spores,, 254, 279 , 



Stalk of Vorticella, 273, 276 

 Stapes, 46, 189, 473, 519 

 Starch, 72, 243 

 Sterilised infusions, 283 

 SternebrK, 483 

 Sternum, 16, 48, 347, 483 

 Stimulus, -various kinds of,. 62 



