OF MEDUS/E MADE BY WILLIAM KEITH BROOKS. 



17 



FIG. 304. Cunoctantha octonaria, after Brooks, in Mem. Boston Soc. Nat. Hist., vol. 3. Showing development of actinula 



larva and young medusa. 



A t young actinula. B and C, budding actinula? giving rise to medusa-buds. D, young medusa with only 4 tentacles. 



E, aboral view of young medusa. 



