CONCERNING THE HIGHER MAMMALIA. 157 



Qn his high attainments, his incessant labours in the field of science, 

 and his apparent desire to arrive at truth. He has embraced, though 

 not fully and unreservedly, the development hypothesis of Darwin. 

 His own admissions on the subject are, "I, for one, am fully convinced 

 that, if not precisely true, that hypothesis is as near an approximation 

 to the truth, as, for example, the Copernican hypothesis was to the 

 true theory of the planetary motions." (p. 127). Again, he says, "I 

 adopt Mr. Darwin's hypothesis, therefore, subject to the production 

 of proof, that physiological species may be produced by selective 

 breeding." (page 128). 



Prof. Huxley with very little ceremony throws aside the arrange- 

 ment of Cuvier, respecting the ordinal position of man. To a certain 

 extent he reverts to the arrangement of Linnaeus, retaining the old 

 Linnaean term for the order in which he places man, namely Primates. 

 In this order he finds seven distinct families. These are 



Anthropini, comprehending Man alone, 



Catarhini, " the old world Apes. 



Platyrhini '' the new world Apes, except the Mar- 



mosets. 



Arctopithecini " the Marmosets. 



Lemurini " the Lemurs. 



Cheiromyini " Cheiromys, of a Rodent type, and 



Galeopithecini " Galeopithecus, a flying Lemur resemb- 



ling a bat. 



The grand point which it is his aim to establish, and by using 

 which, as an argument, he desires to justify this arrangement, is " that 

 the structural differences which separate Man from the Gorilla and 

 the Chimpanzee are not so great as those which separate the Gorilla 

 from the lower Apes." And in order to make this point clear and 

 credible, he descends to particulars, commencing as low as intra-uterine 

 existence. The following is an abstract of his argument. All ani- 

 mals, save the very lowest, are produced from an ovum. The ovum 

 of a chicken and that of a dog are primarily identical in character. 

 Man himself originates in a similar germ. It is some time before 

 Man, in his embryo state, can be distinguished from the young puppy, 

 but in the course of development, the human embryo comes to differ 

 from that of the dog, in characteristics. The placenta, for example, 

 of the dog assumes a zone-hke form, whilst that of Man becomes dis- 



