Dr. BR. Kossman on the Entoniscide. 91 
to a certain extent my results agree with the figure given of 
it by Fritz Miller (1, pl. i. fig. 5). According to this a very 
rudimentary labrum, a somewhat more distinct medianly emar- 
ginate labium, and a pair of rudimentary limbs furnished 
with a denticle seem to be present; the latter certainly corre- 
spond to the stilettiform mandibles of the Bopyride, but are 
much stouter and not covered by the labium. Between these 
mandibles the mouth-aperture appears vertical at the surface ; 
a little further down it becomes triangular, with the apex 
directed downwards; the latter disappears, and the triangular 
cleft becomes first a crescent-shaped one (with the concavity 
turned upwards, a), then a simpler transverse fissure (6), and 
lastly a transverse cleft which divides at its extremities (c¢ 
and d). ‘This transverse cleft finally breaks through into the 
stomach, which is filled with the long papille. The stomach, 
as Fraisse has already correctly stated, and as, indeed, is dis- 
tinctly expressed even in the external form of the body, is 
divided by a deep furrow, running round it in a plane perpen- 
dicular to the longitudinal axis, into two nearly globular 
communicating halves. I have already mentioned in my 
“ Studien tiber Bopyriden,” that an indication of this divi- 
sion exists also in the Bopyridz; and I have there also referred 
to the finer structure and the function of this organ; to this 
I may refer, so far as a completion of Fraisse’s statements 
seems necessary. 
~ The name cephalogaster, which Giard proposes for the head of 
the Hntoniscide because it contains this stomach (‘ cette téte 
mériterait plutdt le nom de cephalogaster’’), is, in the first 
place, not properly formed, for such a name would indicate a 
particular kind of stomach, but not a particular kind of head ; 
and, secondly, it is unnecessary, because in all Crustacea the 
stomach, if present, is situated in the head, and therefore we 
should have to say cephalogaster instead of cephalon. 
An intestine issues from the papillose stomach; and its 
special constitution is noticed only by Fraisse. In his figure 
6 he shows quite correctly how in this region of the intestine 
a great swelling projects from the dorsal surface into the 
lumen; and both in his figure and in the text he indicates 
peculiar minute chitinous hairs, which still further obstruct 
the remaining narrow fissure. This arrangement evidently 
serves for the establishment of a separation between the liver 
and the papillose stomach, and proves that here the former 
does not receive nutritive matter into its cavity. In the 
Bopyridz only an indication of this swelling is present, and, 
indeed, im the partition projecting into the stomach; this, 
although exactly similar i form and histological structure, 
