Marshall—A Parasitic Ostracod. 
125 
segmented and bears at its end two claws tlie lower of which is 
sickle-shaped and nearly as long, as the palp itself. 
Upper lip :—The chitinous supporting rods in the upper lip, 
Pl. XII, fig. 12, have been described by Claus (3) in a number 
of species of Ostracods and both he and Turner (16) have 
worked out the other parts of both the upper and lower lips. In 
Entocythere the supporting strands are not well developed. 
Along the lower surface at the outer end are a number of small 
hollow 7 inwardly directed setae. These at their base communi¬ 
cate with a row of enlarged hypodermal cells which are con¬ 
nected by filaments with the labial nerve. Both this and the 
sense organ which is directly under it in the lower lip have been 
described by Turner (16). Just behind this setigorous portion 
the lower wall of the lip bends slightly upward forming with an 
opposed bend in the lower lip, an enlarged space, the atrium, 
in which the masticatory teeth of the mandible meet. Back of 
the roof of the atrium the wall suddenly bends toward the lower 
lip and then after a short distance gradually upward again un¬ 
til the level of the rest of the lip is reached. This peculiar 
pushed out portion makes the beginning of the oesophagus very 
small. Just above this is the single labial gland’a multi-nu¬ 
clear mass in which the cell boundaries were not seen. This 
gland is figured by Claus: (3) as paired, from each part of 
which a duct passes downward to open into the oesophagus. 
In Endocythere the gland is single, the duct which undoubt¬ 
edly is nresent I was unable to find. 
Lower lip: —The skeletal framework is much stronger and 
consists of more pieces than that of the upper lip. PI. XII, 
figs. 12 and 13. Along the upper and lower margins are paired 
strands, the upper one along each edge is continued at its front 
end into a large upwardly projecting tooth, while those below 
connect with the tooth through oblique lateral pieces. Prom 
the base of each tooth small processes pass forward to> connect 
each with a “reichenorgan,” the end of which is projected be¬ 
yond the margin of the lip. A row of hypodermal cells lies 
just within the lining of the lip. These at the tip are modi¬ 
fied to form a sense organ which is situated just below the one 
in the upper lip, and shows clearly the connection through the 
