436 



INDEX. 



Snapping turtle, 311. 

 Snipe, 349. 

 Sole, 265. 

 Solea, 265. 

 Soleidae, 265. 

 Solenodontidae, 385. 

 Solenoglypha, 325. 

 Solenorhynchus, 258. 

 Solenostoma, 258. 

 Solenostomidae, 258. 

 Solidungula, 393. 

 Somatic layer, 8. 

 Somatic nerves, 64. 

 Somites, 100. 

 Sorex, 385. 

 Soricidae, 385 

 Spade foot toad, 287. 

 Spalax, 390. 

 Sparidae, 259. 

 Sparrow, 351. 

 Spelerpes, 285. 

 Spermatic artery, 191. 

 Spermatophores, 209. 

 Spermatozoon, 5, 207. 

 Spermophilus, 390. 

 Sperm whale, 409. 

 Sphargis, 310. 

 Sphenethmoid, 278. 

 Spheniscus, 347. 

 Sphenodon, 314. 

 Sphenodontina, 314. 

 Sphenoid, 356. 

 Sphenoidal fissure, 164. 

 Sphenopalatine ganglion, 62. 

 Sphenotic, 244. 

 Sphrynidae, 239. 

 Sphyraena, 262. 

 Sphyraenidae, 262. 

 Spinal accessory nerve, 59. 

 Spinal cord, 44. 

 Spinal nerves, 46. 

 Spinous process, 138. 

 Spiny ant-eater, 377. 

 Spiracle, 23, 230. 

 Spiral valve, 36. 

 Splanchnic layer, 8. 

 Splanchnocoele, 101, 103. 

 Spleen, 200. 

 Splenial bone, 164. 

 Splenic artery, 190. 

 Splint bone, 394. 

 Spoonbill, 348. 

 Spreading viper, 325. 

 Springbok, 399. 



