INDEX 



605 



s. 



)acculus, 187 

 Sacculus rotundus, 497, 498, 5^9 

 Sacrum, 482 

 Salamander, 218 

 Salivary glands, see Glands 

 Saprophytic nutrition, 256, 257 

 Sarco emma, 112 

 Scales, 414, 418 

 Scapula, 46, 427, 483 

 Schizocoele, 565,5.^7 

 Sclerite, 3J6 

 Sclerotic, 182, 517, 571 

 Scrotal sac, 470, 521 

 SCYLLIUM, 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, 340, 369,5<?5' 

 Segmentation, equal and unequal, 

 556 ; discoid, 556 

 ,, superficial, 369, 556 



,, nietameric, see Me- 



tamere 

 „ -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 

 Septa, of Earthworm, 325 

 Septum: lucidum, 514; nasal, 42, 



476 

 Serous membrane of embryo, 579, 



583 

 Sesamoid bones, 485, 487, 488 

 Seta, 320, 348, 367 

 Sex-cells, primitive, 549 

 Sexual characters, external, 7, 368, 



417, 469 ^ ,. 



Sexual generation, see Gamobmnri 

 Sexual organs, see Reproductive 



organs 



Sexual reproduction, see under 



various types 

 Shank, 5 



Shell, 381 ; larval, 395 

 Shell of egg, 453 ■ - . , 



Shell-gland 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 ; Kabbit, 470 ; development 



of 576 

 Smell, organ of, see Olfactory organ 

 Snout, 4 



Somatic layer of mesoderm, 561 

 Somatopleure, 561 

 Spawn, 9 

 Species, 215 et seq. ; 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, 54S 

 Spermatophore, 368 

 Spermotheca, 338 

 Sperm-reservoir, 33S 

 Sperm-sac, 338, 451 

 Spinal cord, 28, 155, 443, 515 

 Spiracle, 416, 433 

 Splanchnic layer 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 

 Sternebrsa, 483 

 Sternum, 16, 48, 347, 483 

 Stimulus, various kinds of, 62 



