PLATE 6. 
Obelia striata, page 9. 
Fig. 1. A part of a colony; a, young gonothece ; b, a hydrotheca much les 
usual size ; c, a hydrotheca of the normal size and shape; d and e, ] 
from the same stem showing a-transverse constriction. x 80. 
Fig. 2. A part of another stem with normal hydrothecae and a perfect gonoth e 
Fig. 3. Another hydrotheca from the same stem. x 80. 
Fig. 4. Two gonothecae on the hydrorhiza. x 80. 
Figs. 5, 5b, 5c. Three hydrotheeae from one stem. x 80. 
Figs. 6, 6b. Two hydrothecae from still another stem. x 80. 
Fig. 7. A gonotheca containing the peculiar gonozodid. x 116. 
Fig. 8. A colony, natural size, attached to a shell. 
ay Pe ee met 
