114 MAMMALIAN DESCENT. [Lect. IV. 



todon, and of other Edentates, will be found in the Osteological 

 Catalogue of the Museum of the Eoyal College of Surgeons, England, 

 1845. 



"We owe two of the most valuable and beautifully illustrated 

 memoirs of the gigantic fossil Sloths to the late Professor J. Eein- 

 hardt — (1) On Coelodon (Copenhagen, ■ 1878), and (2) On Grypto- 

 therium darwinii (Copenhagen, 1879). 



Since the delivery of this lecture, my time, for several months, 

 has been mainly spent at the study of this same group — the Eden- 

 tata. I confess that this later work has greatly intensified my con- 

 victions as to the soundness of the foundations on which we, as 

 Darwinians, are building; if we are patient, the mists in whicli 

 we have worked, in this the morning of our labours, wiU, I am 

 satisfied, all vanish, after a time. 



Moreover, after a whUe, wars wiU cease ; now, each man whilst 

 building on the wall has also to be girded with his weapon ; with 

 one hand he builds the wall, and with the other he holds his weapon 

 of defence; this is a great hindrance to the work. 



The example of our great leader, our most trustworthy Darwin, 

 was perfect whilst he was yet with us. His deeds, if not his words, 

 when tempted to hold parley with his enemies, said — " I am doing 

 a great work, so that I cannot come down." 



When this part of the work is done, — when the Edentata are 

 worked out, — and worked into their own side of the great wall, then 

 I feel certain that those who afterwards look at the bulwarks, and 

 teU the towers of the building, wUl be struck with the strength 

 and the beauty of that part ; it will stand out to the eye like a fine 

 flying buttress. 



I cannot, here, go into details as to the structure and structural 

 relations of the types that yet remain to us of this Order, or of their 

 relation to the gigantic, recently extinct, forms. 



If no fossil remains of Edentata had been found, then any 

 speculation upon the forefathers of such strange creatures might 

 have seemed unscientific and useless, showing rather the seK- 

 Gonfidence of the speculator than the value of his thinkings and 

 imaginations. 



Here, however, jSTature herself leads us on, and bids us not fear 

 nor be faint-hearted. Time, in his hurry to garner the last great 



