408 THE AMERICAN NATURALIST. 
EXPLANATION OF PLATE I. 
Fic. 1. Single colony of Pennaria, natural size, showing mode of typical 
branching, attachment to substratum, et 
. 2. Medusa about mature, show ng form of ova at this stage, mode of 
attachment, etc.; ov, ova; rc, radial canals; 1, tentacles 
Fic. 3. Mature medusa, parts as in Fig. 2. Ova potoci spherical, and clus- 
ion. 
. 6. Rather unusual type of polyp, with small bud, 4, on side of body, and 
with less than usual number of tentacles 
Fic. 7. ‘Typical planula, about twentydoor hours after laying of the egg. 
Fic. 8. An unusual larva, similar in some respects to that of polyp in Fig. 6, 
but with several bud-like is ence, EV. 
