2 C03LENTERATA AND 



Ctenophora. 



Free-swimming Larvae. 

 Actinozoa. 



Actinoida. 



Alcyonoida. 



IV. Echinodermata. 



Asteroidea. 

 Ophiuroidea. 

 Echinoidea. 

 Holotliurioidea. 



V. General Directions. 



I. INTRODUCTION. 



It is very difficult for one wishing to study the develop- 

 ment or anatomy of any marine animal to know when and 

 where to find the eggs, young and adult. It is also not 

 easy to recognize the young of certain members of our 

 marine fauna, when they are found. It is also difficult to 

 identify the adult. 



The following pages are intended to serve as a help in 

 the identification of the adults and young of the more 

 common Coelenterata and Echinodermata of the waters of 

 New England. They are written for those 1 who wish some 

 means by which to learn the names and the general exter- 

 nal characters of the common forms of life, which have their 

 homes on our coasts. The author follows with admira- 

 tion the plan adopted by Philip Gosse in a too little known 

 Manual of Marine Zoology, which without claim for orig- 

 inality he has simply modified to meet the necessities of the 

 present case. The lament which Gosse makes that the 

 information necessary to identify the common animals of 

 Great Britain is scattered through monographs, many of 



JThis key to the identification of New England CoBlenterata and Echinodermatn 

 was prepared forthe members of the Touchers' School of Science who attendedmy 

 coarse of lectures in the winter of 1890. It is intended to be used as an introduc- 

 tion to a study of their notes on some of those lectures. 



