INDEX. S67 



Rasorial type described, 257. 

 Representation, law of, 237. 241. 

 289. Theory of, 298. 



Scarabseus sacer, rank of, 273. 



Septenary and other systems, 221. 



Shells of Europe, 40. 



Smeathman on African insects, 99. 



Southern Africa, 100. Asia, 47. 

 Europe, animals of, 35. 



Species, a, defined, 350. Characters 

 of, 275. 



Study, a plan of, desirable, 310. Ge- 

 neral plan of, 355. 



Subgenus, meaning of, 34?. 



Sub-typical form described, 245. 



Suctorial type described, 254. 



System of nature, first laws of, 224. 



Systematic naturalist, objects of, 

 303. 



Systems, artificial, the principal, 

 134. 



Systems and methods, 122. Mixed, 

 127. Natural and artificial, 124. 



T. 



Tables of the rank of groups, 271. 

 273. Insessores and the class 

 Aves, 231. Merulidje, or thrushes, 

 331. Parians, 292. Kaptores and 



Insessores, 239. Kasorial birds. 

 2fi4. 



Temminck, system of, 184. 



Tests of a natural group, 287. The 

 circle of Merulidce, 332. 



Theory of representation, 237. 



Thysanura and Chilopoda, 217. 



Titmouse, blue, 36i'. 



Transportation of groups, 217. 296. 

 299. 



Tropical America, 67. 72. 



Types of a typical circle, 243. Of 

 an aberrant circle, 243. 



Typical and aberrant circles ex- 

 plained, 323. 



Typical form defined, 242. 



V. 



Variation, principle of, 296. Theory 



of, 335. 337. 

 Variety, a, defined, 352. 

 Vertebrated animals, circle of, 320. 

 Verification of a natural group, 



287. 

 Vieillot, system of, 183. 



W. 



Willughby and Ray, system of, 



138. 

 Woodpecker, qualities of, 243. 



THE END. 



