214 RITTER. [Vou XII. 
that in some instances at least, as already shown, the connec- 
tion between the zooid and the stolonic septum becomes 
severed. 
To see how the same relations would be produced in Gooa- 
sirta, it is only necessary to imagine the bud to retain the 
connection with its parent, and for the connecting neck, shown 
almost severed in Fig. 15, Pl. XII, to become more elongated ; 
in other words, to form a stolon. 
Text figures 1 and 2 illustrate the scheme that is here 
described, 1 representing Goodsivia and 2 Perophora ; d indi- 
CAGAGAGAG- 
Fic. 1. 
Be nhs prs 
¢ Ph S: d ¢ g f 

Fic: 2. 
cates daughter and / parent ; 4.s. branchial sac, #0.s. peribran- 
chial sac, and s¢. stolon. The stolons in Goodsiria are not 
connected to the daughter zooids, since we do not know 
whether the connection would be to the branchial or peribran- 
chial sacs. 
But when we come to examine the subject more closely we 
find that the likeness of the two conditions is much less strong 
than it at first appears. In the first place we see that the 
blastozooids of the Goodszrza colony would stand in the relation 
to one another of mother, daughter, granddaughter, etc., while 
in Perophora this is not so. Here the blastozooids are rather 
all to be looked upon as sisters ; that is, they are all produced 
by the stolon, and we have no facts to indicate that the stolon 
ever arises from any zooid excepting the original embryozooid 
of the colony. Another distinction that results directly from 
