530 



INDEX. 



Siren, trachea of, 468, 470. 

 Sirenia, 16. 



limb-bones of, 166, 170, 189. 



mammary glands of, 489, 490. 



skull of, 117, 129. 



spine of, 63. 

 Situation of teeth, 254. 

 Sivatherium, skull of, 129. 

 Sixth cervical vertebra, 54. 



nerve, 390, 391, 399. 

 Size of brain, 378. 

 Skate, limbs of, 153. 

 Skeleton, 22. 



external, 23, 236. 



internal, 23, 214. 



of face, 74. 



of foot, 184. 



of hand, 150. 



of head, 74144. 



of lower limb, 177. 



of spine, 25. 



of upper limb, 145. 



Skeletons, axial'andappendicular, com- 

 pared, 234. 

 Skin, 236, 238, 461. 

 Skull, 74144. 



Skunk, cutaneous glands of, 487. 

 Sloths, 17. 



circulation of, 421. 



larynx of, 474. 



Jimb-bones of, 155, 156, 158, 164, 

 166, 169, 171 173, 175, 176, 189, 

 197, 201, 203, 206, 211 213. 



liver of, 455, 456. 



mammary glands of, 489. 



muscles of, 342, 343, 345, 346, 356, 



skull of, in, 114, 116, 13 r, 133, 142. 



spine of, 43, 47, 5 1, 55, 68. 



teeth of, 274. 



trachea of, 469. 

 Slow Lemur, circulation of, 421. 



larynx of, 473. 



muscles of, 339. 



spine of, 51. 

 Slow-worm (a legless Lizard), spine of 



64. 



Slugs, 6, 13. 

 Small intestine, 442, 446, 447. 



sacro-sciatic ligament, 180. 

 Snails, 6. 13. 

 Snakes, 18. 



cutaneous glands of, 487. 



lungs of, 464. 



skin of, 238. 



See also Serpents. 

 Socket of thigh, 178. 

 Soft commissure, 371- -374. 



pa.ate, 289, 434, 436. 

 Solar plexus, 404. 

 Soles, 20. 



eye of, 389. 



Soles, muscles of, 362, 363. 



skull of, 128. 



spine of, 60, 61, 220, 221, 224. 

 Soleus muscle, 305, 306, 352, 354, 361. 

 Sorex, 16. 



limb-bones of, 156, 158, 160. 



skull of, 103. 



spine of, 58, 66. 



teeth of, 261, 264, 265. 

 Sow, mammary glands of, 489. 

 Spalax (a Rodent), 16. 



muscles of, 311. 



skull of, 116. 

 Species, 6. 

 Sperm Whale, 16. 



skull of, 128. 



spine of, 44, 66. 



Sphargis (a Turtle), trachea of, 469. 

 Sphenodon, 18. 



ear of, 396. 



skull of, 103. 



Sphenoid, 75, 76, 78, 8r, 107. 

 Sphenoidal fissure, 76, 82, 83, no, 147. 



sinuses, 93, 140, 141. 



teeth, 2.54. 

 Spheno-maxillary fissure, 89, 134. 



fossa, 89, 134. 



Spheno-palatine foramen, 85. 

 Sphenotic, 103, 106, 110,227. 

 Spider Monkeys, 15. 



muscles of, 324. 



skull of, 136. 



spine of, 50, 58, 72. 

 Spiders, 7, 12, 13. 

 Spigelian lobe, 452, 454, 455 

 Spinal accessory nerve, 88, 368. 



cord, 25, 385. 



enlargements, 386. 



marrow, 4, 25, 385, 386, 400. 



nerves, 385, 390, 397, 399, 401, 403. 

 Spinalis dorsi muscle, 290, 291. 

 Spinax, 20. 



spine of, 38. 

 Spine, 25, 215. 



curves of, 33, 



of exo-skeleton, 243. 



of ischium, 178 180. 



of scapula, 145, 146, 155. 



of tibia, 183. 

 Spines of Siluroids, 278. 



of Teleostei, 277. 

 Spinous process, 27, 40. 

 Spiral valve, 448, 449. 

 Spittle glands, 433, 436. 

 Splanchnapophyses, 223, 224, 226. 

 Spleen, 445, 448, 449, 459, 483, 484. 

 Splenial bone, 98, uo. 

 Splenic artery, 449 

 Splenius muscle, 283, 289, 290, 322. 

 Sponges, 8. 



Spoonbill, urinary organs of, 482. 

 Spurs, 247. 



