V] PHOTOGKAPHY AND ILLUSTRATION. 109 



type-specimens. It is often impossible to inspect the original 

 fossils which have served as types, and it is of the utmost 

 importance that the published figures should be as faithful as 

 possible. M. Crepin^ of Brussels, in an article on the use of 

 photography in illustrating, has given some examples of the 

 confusion and mistakes caused by imperfect drawings. It does 

 not require a long experience of palaeobotanical work to demon- 

 strate the need of care in the execution of drawings for repro- 

 duction. 



1 Cr6pin (81). 



I 



