ECHINODERMATA OF NEW ENGLAND. 43 



with clusters of individuals at intervals. Sexual organs 

 connected with these clusters. 



D. formosa. 



EUDOXIA LESSONII. 

 DIPLOPHTSA INERJIIS. 



Free -swimming larvae. 



Agalmoides elegans. The agg is dropped from the bells 

 in the cluster of female sexual bodies and goes through its 

 segmentation in the water. 



There are three larval stages in the progress of the de- 

 velopment which are called : 



1. Primitive larva. 



2. Athorybia stage. 



3. Physophora stage. 



All of these are found free-swimming in surface fishing; 

 the first is rare, the second and third are taken almost 



