56 Dynamic Theory. 



CHAPTER VI. 



TABULAR REVIEW. 



The tables introduced in this chapter are from Hreckel's "Evolution 

 of .Man." They show in a comprehensive manner the general facts as 

 to the status of man and the other animals, with relation to each other. 

 Such tables are very handy to the student, for reference. 



The pedigree tables must be regarded as to a certain degree provi- 

 sional and tentative. But they are not likely ever to be altered in re- 

 spect to main and essential points. In some minor points, no doubt, 

 the progress of discovery has already prepared the way for revision. 



In Table I we have a revised general classification of the Animal 

 Kingdom based on their relationships of common derivation; according 

 to Hseckel. The figures in the right hand column indicate the steps 

 which are successive as to time, and correspond approximately with the 

 steps indicated in Table IV. The figures in the middle column descend 

 to particulars and indicate relationships corresponding with the distance 

 apart of the numbers. Thus birds and mammals occupy the relation- 

 ship of cousins; not that of a parent and child. 



Table II is a classification of the Vertebrate tribes, according to their 

 genetic relationships. There are two general divisions, the acrania or 

 those without skull comprising the single class amphioxida or lance- 

 lets, and the craniota or skulled animals, embracing all the rest of the 

 vertebrates. These are again subdivided into those having only one 

 nostril, embracing the hags and lampreys, and those having two nostrils. 



This double nostrilled division is subdivided into six classes, three of 

 which, the fishes, mud-fishes and amphibians, are non-amnionate, that 

 is, not nursed in an amnion sac while in embryo, the other three, rep- 

 tiles, birds and mammals, are amniota, their young being enclosed in 

 an amnion sac during embryo life. 



Table 7/7 is a like classification of Mammals. The lowest two sub- 

 classes the monotremes and marsupials, while being amnionate are 

 non-placental, all the higher tribes of the mammalia being placental. 

 The placentals are seen to be divided into those not deciduate, those 

 having deciduate girdle placenta and those having deciduate discoid 

 placenta, distinctions which have been already explained. 



In Table IV is given a progressive list of animal stages, from the bot- 

 tom in monera to the top in man. There are twenty-two stages given. 

 The differentiation of animal types, one . from another, has been an in- 

 finitely slow process, and the steps have been inconceivably small. .An- 

 imal types have attained their differences by the slow and gradual accu- 

 mulation of such small differences as we can see between the brothers 

 and sisters of any family. The tendency to inherit from ancestors, is 



