NOTE. 



This collection of drawings is extracted from the three volumes 

 of Medusae of the World, by Alfred G. Mayer, to whom they were 

 presented, for publication, either by Professor Brooks himself or by 

 the Department of Biology of the Johns Hopkins University, after 

 the death of Professor Brooks in 1908. 



It is hoped that by gathering into one publication the beautifully 

 executed drawings of this faithful observer we may raise one more 

 tribute of respect to his memory as a leader in research. 



