X PREFACE TO THE SECOND PART. 



the same period. I had neither the time nor the zeal necessary to 

 re-examine the whole; besides, it is doubtful whether eyes some 

 twenty years older would improve matters. 



This somewhat neg-lected book is therefore commended to the in- 

 dulgence of my fellow-workers, with the hope that it may at least 

 form a basis upon which further work may easily be done ; to proffer 

 more than this, as I stated, with a quotation from Sommering-, 

 in the preface to the first part, I have never even hoped. 



The final part of the work, on the viscera and sense-organs, has 

 been undertaken by Professor Wiedersheim, and will appear in the 

 Spring- of 1882. 



ALEXANDER ECKER. 



Feeibukg, 

 August. 188 1. 



