INDEX. 
Rasorial type described, 257. 
Representation, law of, 237. 241. 
289. Theory of, 298. 
s. 
Scarabeus 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, 348. 
Sub-typical form described, 245, 
Suctorial type described, 254. 
System of nature, first laws of, 294. 
Systematic naturalist, objects of, 
303. 
a 
Systems, artificial, the principal, 
Systems and methods, 122. Mixed, 
127. Natural and artificial, 124. 
as 
Tables of the rank of groups, 271. 
73. Insessores and the class 
Aves, 251. Merulide, or thrushes, 
331, Pariane, 292. Raptores and 
THE 
367 
eee 239, Rasorial birds, 
64. , 
Temminck, system of, 184. 
Tests of a natural group, 287. The 
circle of Merulide, 332. 
Theory of representation, 237. 
Thysanura and Chilopoda, 217. 
Titmouse, blue, 362. 
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. 
iW 
Willughby and Ray, system of, 
138. 
Woodpecker, qualities of, 243. 
END. 
