EXPLANATION OF PLATE LXI[. 



Fig. L — Acanthoisis flabellum, Wright and Studer. x 2. 



Fig. 2. — Detail of the same, x 20. 



Fig. 3. — Veiy young colony of Alcyonium etheridgei, sp. nov. x 2. 



Fig. 4. — Dendronephthya waitei, sp. nov. Complete colony. Nat. 



