Marshall—A Parasitic Ostracod. 
129 
their abutting sides, each, a spherical bladder-like cavity; these, 
in living specimens, are of a, light yellow color, clear and re¬ 
fractive, in section appearing as colorless vaeoules. They are 
connected with each, other and in living specimens were seen to 
he in communication with a long narrow tube. The fourth; and 
most ventrally placed cell contains, instead of the bladder-like 
portion, a wide, irregular duct which is nearly as long asi the 
cell and in two slides was seen to open outside the body, PI. 
XII, fig. 17', the opening being on a level with the insertion 
of the second antenna. 
Adhesive-gland :—Kaufmann (7) in his figures of Scleroch¬ 
illis contortus (Plate XI, figs. 3 and 7) has shown a large gland 
which he calls the antennal, which arising near the centre of the 
body passes into the fiabellum of the second antenna,. The part 
shown by Kaufmann (7) is; only the secretion of the gland 
which, he did not figure. This is the “poison’’-gland or “spin- 
ning”-gland of the Cytheridae. It is situated near the dorsal 
wall of the shell just back of the eye, the glands of the right and 
left sides nearly touching along; their inner surfaces. Each, PL 
XII, fig. 18, is unicellular and laterally compressed; the nu¬ 
cleus is small with a large nucleolus. In stained specimens, or 
those killed in Flemming’s solution, both the gland and its se¬ 
cretion were easily seen, the latter being readily followed to; the 
tip of the fiabellum. The secretion is collected in the lower 
part of the cell and passes through a, long duct which, gradu¬ 
ally decreasing in diameter opens at the tip of the fiabellum, 
urticating seta,, of the second antenna. The use of the secre¬ 
tion I have already explained in the description of the append¬ 
age containing its outlet. 
Claus (3) has described for the Ostraeods both labial and 
maxillary glands and Vavra (17) says that besides these, large 
glandular cells are found in the basal segments- of the appen¬ 
dages, In Entocythere there are two pairs of distinct glands 
situated in front of the brain and extending into the antennae. 
Those of the first: antennae; lie directly in front of the fore*- 
brain, while those of the second antennae are in front of the 
hind brain. Besides these and the gland of the upper lip sim¬ 
ilar structures are found below the second, third, and fourth 
9 
