122 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 4 



PLATE 16 



Fig. I. Ahietinaria expansa 



a. Portion of branch to show arrangement of hydrothecae. 



b. Portion of colony to show branching and gonangia. 



Fig. 2. Aglaop]ienia lotKjicarpa 



a. Portion of hydrociadium to show hydrothecae. 



b. Two hydrothecae further enlarged (X40). 



c. Corbula. 



Fig. 3. A(/laophcnia pinguis 



a. Portion of hydrociadium to show hydrothecae. 



b. Hydrothecae further enlarged (X40). 



c. Corbula. 



Fig. 4. Ac/laoplifttia propinqna 



a. Portion of hydrociadium to show hydrothecae. 



b. Hvdrothecae further enlarged (X+0). 



