Echinoderm^Larvae. 



/^ - 





PI. XVIII. 





->■ 1 



J^' 



si, c. 

 d, 

 ent. 



..# 



St. 1- 



'. ent. 



'■.■"'. "'^j?^ '^' 



Th. Montensen del. 



Heliocidaris erythrogramma (Val.) 



v 



Dansk Repr. Anst. 



