264 ^. J^l Clark — Hydroids of the Pacific Coast. 



Plate XLI. 

 Figure 1. — Plumularia setacea ; portion of a branch with neinatophores and female 



gonothecaj, a. 

 Figure 2. — The same; a portion of the main stem; n, uematophores ; /;, hydrothecaj ; 



2a, male gonotheca. 

 Figure 3. — Aglaophenia struthionides ; a portion of a pinna ; 3a, 36, and 3c, different 



views of the same; n and «', nematophores ; h, hydrotheca; 3tZ, cortaula; «, the 



body of the eorbula; 6, the wing-like processes at the base; n, and -«', the 



nematophores; /*, the hydrothecte. 



