144 BULLETIN OF THE 
veloped as final products of the same process. From the observations which 
were made bearing on this question, it seems probable that the egg in Lizzia is 
always produced after the budding of the young has ceased. As a preliminary 
to the whole question, it must first be determined whether Lizzia has a fixed 
hydroid or not, 
The observation of the egg of Lizeia by Claparede,* who described it as 
passing through a direct development, should not be dismissed as an error, in 
the summary way it has been by many naturalists. The egg enclosed in a 
capsule, which he figures, and which he says develops directly into a me- 
dusa, was probably the last product of this process of budding, which opened. 
with the production of a jelly-fish by a sexual gemmation. 
The growth of the bud of a young Lizaia from the proboscis of the parent is 
as follows. 
Plate I. fig. 1 represents a moderately large Liezia, which, however, is not an 
adult, where the number of tentacles in radial and intermediate clusters is the 
same. In this figure, on the left-hand side of the upper part of the proboscis 
an attached medusa bud, considerably developed, can be seen. The shape of the 
bud is about spherical, and it is united to the proboscis by a short, thick pe- 
duncle, through which passes a tube forming a free communication between 
the stomach cavity of the parent and the half-formed proboscis of the young. 
The surface of the bell, as that of all the other younger buds which are figured, 
is covered with minute papilla. The contractions and expansions of the bud- 
ding bell, even while still attached, are quite rapid and violent, causing the 
animal to sway back and forth as the water emerging from the opening of the 
bell strikes against the inner walls of the bell cavity of the parent. The cavity 
of the bell of the young is relatively much larger than that of the adult. The 
whole of its apex is taken up by a short pedicle, by which, as has been already 
pointed out, the bud is fastened to the parent, 
The number of tentacles appended to the bud in this stage of growth is six- 
teen. The same number is also found in the youngest of the free forms, which 
had voluntarily separated from the parent, and were fished up with a drag-net. 
These tentacles are distributed as follows. At the end of each tube there is a 
cluster of three tentacles, composed of a medial member, usually the longest, 
and two lateral. A single short tentacle is placed ih a position midway on the 
bell rim between cach of these clusters. The tentacular bulbs in the bud as 
compared to the bell are larger in the bud than in the adult. The proboscis 
has a yellow color, and is, like that of the adult, already four-parted, and when 
seen from below is cruciform, The extremities of the oral tentacles are un- 
divided, but bear many small knobs mounted on short thread-like styles. The 
proboscis has as yet no peduncle. The stomach and oral tentacles resemble 
closely the same organs of Dysmorphosa. Three buds on the proboscis of this 
bud belong to a second generation, grandchildren of the original Ligeia with 
which our account opened, The second generation of buds has not been found 
* Zeit. f. Wiss. Zodl., Bd. X. p. 403. 
