INDEX 



723 



Sep.o, 36r) 



Scpliini ;niri(iilanini. 278, -7'.*", .So.'i 



Septum liR'iihuii, 470 



Serous iiiciiil)r;ine, of Hinls, 441, 44li : 

 Maniinalia, 47(3 



Serpentariii.i, (i30 



Sermiiux, 241 



Sesamoid hone, 393* 



Severiiio, G69 



Sexual selection, Gofi* 



Shaft of long bone, 84* 



Shagreen, 171 



Shags, 415, 422 



Shank, 69 — See Hindliiiil) 



Sharks, 169-lSS 



Shear wateip, 3t)8, 415 



Sheep, 4S2, 501, 539, 571. 598 



Shell of Chelonia, 341 ; of Pigeon, 408 



Shell-gland, Dogfish, 164, 165 : Elasnio- 

 branchs, 180 



Sheli-nicmbrane, 408, 435 



Shore-fishes, 227 



Shoulder-girdle— See Pectoral arch 



Shrews, 485, 507 



Siamayiqa, 631 



Siebold,' 682 



Silurian jjeriod, 639 



Siluroids, 220, 227, 228, 232, 233, 236, 

 238, 241, 243 



Simi'x, 631, 487 



Simia i<atf/riis, 556, 557 



Simiida', 487*. 509, 552, 554, 600 



Sinuses, 93, 156* 



Sinus rhomboidalis, 405 



Sinus venosiis, 90— See Heart 



Siphons, oral and atrial, of Ascidia, 15, 

 16 



Siredon, 312 



Siren, 293, 295, 296, 305 



Sirenia. 480*, 490, 501, 510, 511, 534, 535, 

 536, 568, 576. 581, 598, 606 



Siren lacertiiia, 295 



Skates, 170 



Skeletogenous layer, 73 



Skeleton of Craniata — See Skull, Verte- 

 bral column, Ribs, Sternum, Pectoral 

 ai'ch. Pelvic arch. Limb-skeleton 



Skin, Craniata, 69 



Skincs, 334, 342, ,365, 369 



Skull of Craniata, 75, 76. 77, 78, 79, 80 : 

 Petromyzon, 125, 126, 127 : Mvxinoids, 

 140: Dogfish, 147. 148: ' Elasmo- 

 Inanchii, 172. 173, 174: Holocephali, 

 190, 192, 193: Trout, 202, 203, 204, 205, 

 206 : Teleostomi, 230 : Ceratodus, 248, 

 249 : Frog, 268, 269 : Amphibia, 299, 

 300,301, 302: Lizard, 317, 318, 319: 

 Reptilia, 347-^353: Pigeon, 388, 389: 

 Archaiopteryx, 419 : Birds, 427-429 : 

 ■Rabbit, 449 454 : Mammalia, 511, 512: 

 Prototheria. 517, 518, 519 : Metatheria, 

 521-524 : Edentata, 526, 527 : Cetacea 



532, 533: Sirenia. 535: LTngulata, .537- 



.■)40 : Cai-nivora, 545, 546: Rodcntia, 



548 : Insoctivora, 549 : Cliiriiplera, 



550, 551 : Primates, 552-555 

 Slime-Kels, 1.38 

 Sloane, H., 676 

 Sloths, 479, 488, 497, 498, 5|o, r.l.s, :,Ui, 



.525, 526, 627, .528, 529, 530, .5()4, 573, 



598 

 Smelt, 220, 240, 640 

 Smitli, Willi.am, 679 

 Snakes, 335 — See Ophidia 

 Snakes, venomous, 367 

 Soft palate, 459*, 570 

 Soft tortoises, 3.36, 342 

 Solander, 676 

 Sole, 183, 196, 221, 241 

 Solenocytes, 52, 53 

 Sokuodoii, 634 



Solitaire, 416, 417, 426, 430, 642 

 Somatic motor fibres, 116* 

 Somatic nerves, 99* 

 Somatic sensory fibres, 116* 

 Soriridd', 485, 507 

 Souleyet, 683 



South American Ostrich — See Rhea 

 Spallanzani, 674 

 Sparrmann, 676 

 Spe2tr2^t.'i, 299 

 Spencer, Herbert, 683 

 Spermatic artery, 92 : vein, 94 

 Spermatists, 671* 

 Spermatophores, of Holocephali, 195, 



196 ; Amphibia, .308 

 Sperm-sac, of Elasmobranchii, 165, 180 

 Sperm Whales, 480, 516, 567 

 Sphargi.9, 347, 368, 370| 

 Sphenethmoid, 269 

 Sphmiodon puncfattmi, SSo, 339. 340, 343, 



344, 345, .347, 349, .353, 3,56 3«1, .362, 



368, 369 

 Sphenoidal fissure, 452 

 Spheno-maxillar}' fissure, .5.54* 

 Sphenotic, 204, 205 

 Sphyrna, 170 

 Spider Monkeys, 487 

 Spigelian lobe, 574* 

 Spinal accessory nerve, 331 

 Spinal column— See Vertebral colunni 

 Spinal cord, of Urochorda, 35: Amphi- 



oxiis, 54 : Craniata, 98, 99 

 Sjjinal nerves of Craniata, 98 

 Spines, Spinous fin-rays of Teleostomi, 



225 

 Spiny Anteater, 478 — See Echidna 

 Spiracle, of Dogfish, 146 : Teleostomi, 



225 

 Spiracular cartilage, 173, 174 

 Spiracular gill, 1,54*, 178 

 Spiral valve of Petromyzon, 130, 134: 



Dogfish, 1.52, 153: Elasmobranchs, 178: 



Teleostomi, 218 : Ceratodus, 250 



