Index- 



US 



Sea anemone, 45, 386, 395, 396 



cow, 630, 632, 639 



cucumber. 45, 541, 543, 544, 551-553 



fan, 386, 397 



horse, 589, 590 



lamprey (see Petromyzon), 567, 571- 

 574 



lily, 544, 553 



mouse, (see Aphrodite), 454 



pansy, 395 



pen, 386, 395 



snake, 610 



spider (see Nymphon), 489, 516 



urchin, 45, 276, 348, 541, 542, 544, 

 550-551, 553 



walnut (see Ctenophora), 45, 347, 

 397-400, 645 



worm, 45 

 Seal, 256, 638 



Seatworm (see Enterobius), 435 

 Sebaceous gland, 81 

 Sebum, 78, 81 

 Second wind, 122, 156-157 

 Secondary oocyte, 275 



spermatocyte, 275 

 Secretin, 141, 142, 248 

 Secretion, 38-39 

 Segment, 192 

 Segmentation, of animals, 346, 447 



of small intestine, 143 

 Segregation, 301 

 Selachii, 576 

 Selective apparatus, 445 

 Sella turcica, 103, 150, 243 

 Semen, 258 



Semicircular canals, 221, 223, 224 

 Semilunar valve, 63, 162, 163, 172 

 Seminal receptacle, 407 



vesicle, 73, 258 

 Seminiferous tubule, 240, 255, 257 

 Sensation, 192, 213, 214. 218, 221 

 Sense organ, 71, 77, 130, 192, 193, 211- 



224, 530, 531 

 Sensory cells, 217 



nerve, 196, 203 

 Sepia, 481 

 Septum. 161 



annelids, 448 



Aurellia, 395 



mediastinal, 153 



Metridium, 396 



scrotum, 241 



testis, 241 



ventricular, 162, 172 

 Sere, 657 



Serial homology, 496 

 Serological test, 325 

 Serous layer, 135, 136 

 Serpentes, 606 

 Serum, 181, 182 



Sesamoid bone. 111 

 Seta, 447, 455 

 Sex. 240, 307, 308 



behavior, 240, 241, 242 



cells, 255, 279 



chromosome, 308 



determination, 308-309 



influenced character, 310 



hormones, 236, 240-243 



linkage, 307-311 

 Sex-Hmited character, 310 

 Sex-linked character, 309-311 

 Sexual characters, 236, 240, 241, 242, 

 243, 250 



reproduction, 252, 253, 254, 351, 352, 

 370-372 

 Seymouria, 601, 602, 603, 612 

 Shad, 590 

 Shaft, 107 



Shagreen skin, 83, 581 

 Shark, 46, 83, 87, 100, 164, 567, 568, 



587 (see also Squalus) 

 Sheep, 132, 231 



Hver fluke (see Fasciola), 404, 409- 

 411 



parasites of, 409-411, 420, 430 

 Shell, clam, 472 



gland, 479 



mollusc, 467 



protozoan, 351 



turtle, 75 

 Shipworm (see Teredo), 468, 476, 477 

 Shock syndrome, 668 

 Shrew, 628, 630, 632, 633-634 

 Shrimp, 249, 380, 507, 508 

 Sibbaldus, 637 



Sieve plate (see Madreporite) 

 Sight, 205 



Silk gland of spider, 512 

 Silkworm (see Bombyx), 535 

 Silurian period, 343, 482, 509, 568, 575, 



579 

 Silverfish, 536 

 Simple sugar (see monosaccharide), 



31 

 Simulium, 437 

 Sinanthropus, 642 

 Sino-auricular node, 171 

 Sinus, carotid, 214 



ethmoid, 103, 150 



frontal, 103, 150 



gland, 249, 504 



kidney,_ 188, 189 



sphenoid, 103, 150 



subcutaneous, 68 



venosus, 63, 66, 68, 161, 162, 172 

 Siphon, 473, 478, 562 

 Siphonaptera, 540 

 Siphonoglyph, 396 



