ADVERTISEMENT 



The xjresent work is the first ot the New York Aquariniii 

 Nature Series. It is designed chiefly as an aid to the study of 

 tlie marine invertebrate life of tlie region al)i)ut New York. It 

 will he found a valual)le reference hook for visitors studying 

 the collections of the Arpiarium, as the species herein considered 

 are very largely tljose which may be seen there alive, from 

 time to time. Tlie book is a gift of the author to the New York 

 Zoological Society, and the proceeds from all sales are devoted to 

 the increase of the collections of the Aquarium. 



C. H. TOWNSEND, 

 Director of tlie Aquarium. 



