AUTHOR'S PREFACE. 



THIS Pocket-Book is intended to serve for the reception of my 

 pupils' Sketches and Notes during Lectures and Practical Work, 

 and at the same time to facilitate a review of Classification. 



SELENKA. 



TRANSLATOR'S PREFACE. 



IT is believed that this set of Schedules will be found generally 

 useful to students of Zoology, presenting as it does the leading- 

 features of the larger groups in a comparatively small space, while 

 clearness is gained by the use of various kinds of type. The blank 

 paper may profitably be employed to receive brief synopses from 

 voluminous lecture-notes, or, in some cases, definitions of families 

 and smaller subdivisions. 



The Translation has been prepared from the Third German 

 Edition, but numerous additions and revisions have been made by 

 the Translator, who is also responsible for the Notes on Distribu- 

 tion (mainly prepared from Wallace) and the Geological Table. 



J. R. A. D. 



ABKRYSTWYTH, September 1890. 



