CONNECTICUT GEOL. AND NAT. HIST. SURVEY. 



[Bull. 



the sea. As shown in Fig. n, the plutei in no way resemble the 

 adult, but are somewhat pyramidal in form, and often have 



FIG. II. Ophiffpholis aculeata. Free-swimming larva, with long, 

 ciliated arms. (Modified from Fewkes.) 



FIG. 



12. Ophiura brevispina. Free-swimming larva preparatory 

 to transformation to the adult form. (After Grave.) 



