Fig. 
PLATE IV. 
Figs. 1, 2.—Plumularva stylifera. 
o, 1.—Natural size. 
. 2.—Portion of a hydrocladium with gonangium ; magnified. 
Figs. 3, 4.—Plumularia armata. 
a. 3.—Natural size. 
. 4.—Portion of stem with hydrocladia and male and female gonangia ; magnified. 
Figs. 5, 6.—Antennularia fascicularis. 
o. 5.—Natural size. 
6.—Portion of stem with hydrocladia and gonangium ; magnified. 
Figs. 7, 8.—Polyplumaria pumila. 
. 7.—Natural size. 
. 8.—Portion of main stem, with two primary pinne and hydrocladia ; magnified. One 
of the primary pinnee carries a gonangium, and every hydrocladium bears 
an accessory ramulus, 
