MUSEUM OF COMPARATIVE ZOOLOGY. 143 
Bars gives a good account of the process of germination in L. octopunciata. 
This description applies also to L. grata, but he was not able to trace the 
medusa up to what I believe is its adult, The oldest Lizeia which Forbes 
figures is also immature. My account of the sequence in the development 
of the tentacles is different from that which Mr Agassiz gives (Proc. Bost. 
Soc., 1862). 
L. grata was found in abundance at Newport during all the summer months. 
Its small size and transparent bell would render it inconspieuous, if not in- 
visible, were it not for the eight black pigmented ocelli on the bell margin at 
the bases of the tentacles. Four of these ocelli are situated near the point 
where the radial tubes join the margin of the bell, and four on the bell rim 
midway between the radial vessels. 
The bell is deep, campanulate, and in older specimens has a pointed apex. 
The surface is smooth in the adult, and destitute of papille. The relative size 
of all the organs can be seen by a study of Plate I. fig. 1. The line at the left 
of the figure indicates its size. The proboscis is never, except when the bell is 
abnormally reversed, extended outside of the bell opening, but it generally 
reaches down about half of the whole height of the bell cavity. The stomach 
is mounted upon a peduncle, which resembles the substance of the bell walls 
in its transparency, The chymiferous tubes are small, simple, and without 
lateral glands or appendages. They are four in number, and, extending along 
the sides of the peduneulated proboscis, open into the stomach, Near this ter- 
mination the peduncle bears a cluster of peculiar cells. 
The stomach is four-sided, with oral tentacles which impart to it a cruciform 
shape when seen from below. The extremity of each oral tentacle is bifid, and 
the end of each bifurcation is thickly covered with many small cells or peduncu- 
lated knobs, Near the bifurcation of the oral tentacles from the axis of the 
proboscis are also similar clusters of knob-like organs of smaller size than those 
mentioned. "The tentacles are short, very flexible, hollow, uniform in size, and 
with smooth surfaces, They are arranged in eight clusters, which in most 
stages of growth have an inequality in the number of component tentacles. 
The junction of each cluster with the bell margin forms a triangular bulb or 
ocellus, which in the adult is dark brown and black. 
There are no otocysts on the bell margin. Claparede was unable to find the 
male of the Liza which he studied. Forbes mentions the male Lizzia as 
larger than a female, with the attached buds. Mr. Agassiz figures a male 
of L. grata, and. calls the sexual structure near the base of the proboscis “sex- 
ual sacs.” I have observed large Liwia which were females, in which the 
power of germination seemed to have ceased, or to have become dormant, 
although from the proboscis of the same medusa young had previously formed 
by budding. A Lisa in this condition may have been called a male by 
Forbes and Agassiz. The essential elements of the male were not detected in 
L. grata. It would be a very interesting fact to determine whether Lievia lives 
for any length of time after the process of germination from the proboscis has 
ceased, and, if such is the case, whether true ova and spermatozoa are then de- 
