LECT. V.] MATERIALS FOR WORK. 125 



LECTURE V. 



INSECTIVORA. 



THE Edentata are very similar to the Insectivora, but 

 are arrested and modified largely on their own level. 

 They are more related to the Monotremes than to the 

 Marsupials, but the Insectivora appear to be rather a 

 development or outcome of the Marsupials. The works 

 or papers that have been of most value to me in dealing 

 with the Insectivora are by Professors Huxley and Flower, 

 and Dr Dobson ; we are rich, however, in the litera- 

 ture of this Order. It has taken me many years to 

 collect materials for my researches into the develop- 

 ment of these animals. I published some of my 

 results long ago those which related to the shoulder- 

 girdle and sternum but the accumulated matter on 

 the skull, work done during the last two years, has not 

 yet seen the light. In working out the details of the 

 development of the skull, I have followed my own bent, 

 gladly accepting help from my fellow- workers in biology. 

 But in arguing upon what has been seen and regis- 

 tered in this special piece of research, I have been 

 largely influenced by one whose aptitude for drawing 



