158 BULLETIN OF THE 
process of self-division. Equatorially in a large otocyst a constriction takes 
place, which later deepens until the inner wall touches the floor opposite the 
point where the first sign of constriction appeared. The double otocyst, one 
of the component parts of which is usually smaller than the other, is now 
separated into two distinct otocysts by the growth of the intervening margin 
of the bell. Besides the production of otocysts by fission in this way, new 
otoeysts also appear by a growth from the ectoderm of the bell rim. 
The young of T. formosa is said by Mr. Agassiz to be without otocysts. A 
specimen of Tima still younger than that represented in Fig. 169 of the 
North American Acalephæ has two otocysts with otoliths, between each pair 
of the sixteen tentacles. The number of otoliths in each of these otocysts is 
seven. 
Many specimens of this genus were without stomachs on the end of the pro- 
boscis, From many specimens taken in the last of May, a single example only 
was not mutilated in this way. A new stomach, however, grows quickly from 
the peduncle of a Tima, It forms by a process of budding in four or five 
days, so that all the oral tentacles are f ully formed at the end of that time. 
The formation of the new stomach begins simultaneously in four points, which 
are near the terminations of the chymiferous tubes, at the end of the peduncle. 
As they increase in size they join at their sides, at last forming the stomach as 
it has been described in the adult. 
Eutima gracilis, n. s. 
Plate V. Figs. 1, 2, 3, 4. 
A single specimen of a Eutima, which differs somewhat from either of the 
two species, JJ. mira and E. variabilis, described by MeCrady, was taken in the 
tow-net. It differs from these, and also from E. limpida of Mr. Agassiz, 
in that each of the rudimentary tentacles, as well as those fully developed, 
bears a pair of lateral “spurs,” or thread-like appendages. It may be the 
adult of any one of the three forms of Kutima which have been described 
from American waters, but the deseriptions which have been given of them do 
not warrant a reference of it to any one of the known species. 
The bell is shallow, rounded at the apex, and has very transparent walls. 
The surface is smooth. The radial tubes are thread-like, and from them hang 
small transparent sexual organs, which extend their whole length in the bell, 
but not on the proboscis. Their undeveloped condition indicates an immature 
individual. From the centre of the bell cavity hangs down a long, flexible, 
transparent, pedunele, along which extend the four chymiferous tubes, after 
arching over from their radial course on the bell. The peduncle protrudes 
outside the bell opening, and carries on its end a globular stomach, which has 
a mouth with four oral tentacles. The latter structures have smooth lips, are 
undivided at the tips, and are destitute of knobs. 
The tentacles arise from the margin of the bell at the junction of the radial 
