Thus we come, at last, to the purely zoological method, from which it is not unnatural to expect more than from any other, seeing that, after all, the problems of ethnology are simply those which are presented to the zoologist by every widely distributed animal he studies. The father of modern zoology seems to have had no doubt upon this point. At the twenty-eighth page of the standard twelfth edition of the "Systema Naturae," in fact, we find:-- I. PRIMATES. _Dentes primores incisores: superiores IV. paralleli, mammae pectorales II._ 1. HOMO. Nosce te ipsum. Sapiens. 1. H. diurnus: _varians cultura, loco._ _Ferus_. Tetrapus, mutus, hirsutus. * * * * * _Americanus_ [Greek: a]. Rufus, cholericus, rectus--_Pilis_ nigris, rectis, crassis--_Naribus_ patulis--_Facie_ ephelitica: _Mento_ subimberbi. _Pertinax_, contentus, liber. _Pingit_ se lineis daedaleis rubris. _Regitur_ Consuetudine. _Europaeus_ [Greek: b]. Albus sauguineus torosus. _Pilis_ flavescentibus, prolixis. _Oculis_ caeruleis. _Levis_, argutus, inventor. _Tegitur_ Vestimentis arctis. _Regitur_ Ritibus. _Asiaticus_ [Greek: g]. Luridus, melancholicus, rigidus. _Pilis_ nigricantibus. _Oculis_ fuscis. _Severus_, fastuosus, avarus. _Tegitur_ Indumentis laxis. _Regitur_ Opinionibus. _Afer_ [Greek: d]. Niger, phlegmaticus, laxus. _Pilis_ atris, contortuplicatis. _Cute_ holosericea. _Naso_ simo. _Labiis_ tumidis. _Feminis_ sinus pudoris. _Mammae_ lactantes prolixae. _Vafer_, segnis, negligens. _Ungit_ se pingui. _Regitur_ Arbitrio. _Monstrosus_ [Greek: e]. Solo (a) et arte (b c) variat.: a. _Alpini_ parvi, agiles, timidi. _Patagonici_ magni, segnes. b. _Monorchides_ ut minus fertiles: Hottentotti. _Junceae_ puellae, abdomine attenuato: Europoeae. c. _Macrocephali_ capiti conico: Chinenses. _Plagiocephali_ capite antice compresso: Canadenses. Turn a few pages further on in the same volume, and there appears, with a fine impartiality in the distribution of capitals and sub-divisional headings:-- III. FERAE.