PLATE XXXn. 



PAGE 



F\(f. 1. Echinodictyxtm rngosnm : iintura! size, . . . , . Ifif) 



Fig. la. P'lifl of a branch : x 3 



Fig. 2. Echinodictyum asperum, attached to a stone; natural size. . . Ifi5 



Fig. 3. Acanthella pulcherrima ; natural size, . . . . .177 



