INDEX 



657 



Septum ventriculorum, 204 

 Serosa, 571 



Sertoli, cells of, u, 15, 16 

 Sex cells, 374 

 cords, 375 



determination of, 21 

 Sexual elements, 374 

 Sheaths, myelin (medullary), 448, 464 



neurilemma, 448 



Sherrington, concerning effectors and recep- 

 tors, 418 



Shoulder girdle, 167 

 Siamese twins, 605 

 Sigmoid colon, 209 

 mesocolon, 351 

 Sinus, cavernous, 220 

 confluence of, 221 

 coronarius, 223 

 frontal, 550 

 maxillary, 550 

 petrosal, 222 

 precervical, 115 

 sagittal, 222 

 sphenoidal, 550 

 terminalis, 187 

 transverse, 221 

 venosus, 191, 201 

 Sinusoidal circulation, 316 

 Sinusoids, 229, 315, 316 

 Situs viscerum in versus, 323 

 Skeletal musculature, see Musculature, skeletal 

 system, anomalies of, 177 

 appendicular skeleton, 166 

 axial skeleton, 146 

 development of the, 129 



of joints, 1 73 

 head skeleton, 154 

 notochord, 146 

 ribs, 152 

 sternum, 153 

 vertebrae, 147 



Skeleton, axial (see also Axial skeleton), 146 

 appendicular, (see also Appendicular 



skeleton), 166 

 Skin, the, 407 



anomalies of, 414 

 dermis, 408 

 epidermis, 407 

 glands of, 412 

 pigment of, 408 

 Skull, defects of, 612 



development of, 154 

 Smegma embryonum, 412 

 42 



Smith, G. Elliott, concerning archipallium, 439 

 Smooth muscle, 280 



histogenesis of, 281 

 Sole plate, 409 



Somaesthetic area of pallium, 440, 527, 528 

 Somatic area (see also Pallium, precentral area), 



528 



segmentation, 420, 430 

 structures, 428 

 Somatochrome cells, 459 

 Somatopleure, 340, 573 

 Somites, mesodermic, 43, 45, 47, 60, 65, 79, 80, 



81, 82, 96, 98, 104, no 

 Spermatids,.u, 12, 13, 16, 20 

 Spermatocytes, n 



primary, n, 12, 13, 16, 20 

 secondary, 12, 13, 16, 20 

 Spermatogenic cells, 1 1 

 Spermatogenesis, n, 15, 16, 22 

 Spermatogonia, u, 20 

 Spermatozoa, n, 16, 30, 31, 32 

 forms of, 7, 8 

 number of, 7, 9 



Spermatozoon, the, 6, 13, 28, 29, 30, 31 

 diagram of, 7 

 discovery of, XIII 

 human, 6, 14 

 acrosome, 6 

 axial filament, 6, 14 

 body, 6 



centrosome, 6, 14 

 end knob, 6, 14 

 galea capitis, 6, 15 

 head, 6, 14 

 middle piece, 14 

 neck, 6 

 nucleus, 6, 13 

 spiral filament, 6, 14 

 tail, 6 



Spermium, i 

 Sphenoid bone, 159, 161 

 Sphenomandibular ligament, 163 

 Sphenopagus, 608 

 Sphenopalatine ganglion, 471 

 Spigelius, lobe of, 318 

 Spina bifida, 613, 614, 615 

 cystica, 613 

 occulta, 614 



Spinal accessory, XI, nerve, 434, 465 

 cord, the, 423, 424, 443, 476 

 Clarke's column, 436, 481 

 dorsal funiculi, 460, 473, 477 

 gray column, 428, 478 



