ANTHOZOA HYDROIDA. 85 
In branching lines the parent trunk adorns, 
And parts ere long like plumage, hairs, or horns.” 
There are several kinds of eggs from which young animals 
spring. There are what have been called motive buds pro- 
duced in the ovisacs. These are found in the 7udularina like 
little clusters of grapes, growing from the bases of the ten- 
tacula. Sir J. G. Dalyell, in the ‘Edinburgh New Philo- 
sophical Journal,’ in his observations on Zubularia indivisa, 
states, that as soon as the bulb had fallen from its crested 
head, slight prominences, enlarged at the tips, pullulate 
from the under surface, and the “nascent animal,” elevating 
itself on these rudiments of the tentacula, as on so many 
feet, enjoys the faculty of locomotion. ‘Apparently se- 
lecting a site, it reverses itself to the natural position, with 
the tentacula upwards, and is then rooted permanently by a 
prominence, which is the incipient stalk, originating from 
the under part of the head. Gradual elevation of the stalk 
afterwards continues to raise the head, and the formation of 
the zoophyte is perfected.” In writing respecting Laome- 
dea dichotoma, he says that the vesicles, which are seldom 
produced, contain from twenty to thirty greyish corpuscula, 
with a dark central nucleus. At first, all are immature and 
quiescent, but motion at length commences: the corpuscula 
