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and simple. Above these two bristles near the joining line there is a single, short, simple bristle.
Besides these three there are in some cases one or a few bristles inside the incisur. The list
behind the incisur is narrow, weakly undulating and has bifurcated bristles, situated very close
together, of about the same type as those on the rostrum. Farther back the list has fewer and
fewer bristles, half-way along the shell they are already very sparse and a little behind this
point they stop almost entirely, though one or a few may be found. Within the posterior
margin of the shell — where the list is somewhat broader than it is anteriorly — it has, however,
rather mimerons small, simple bristles, very difficult to verify, and it is also characterized liere
by pore-like formations similar to those reproduced for C. (Doloria) levis (see p. 228, fig. 3).
On the part between the list and the margin of the shell — along both the posterior and ventral
margins — bristles generally seem to be quite absent; sometimes, however, a few may be observed.
The selvage is only broacl along the posterior edge of the rostral incisur — the latter is quite filled
by it — the rest of it is narrow and does not extend outside the margin of the shell. It has
close, uniform and fine cross-striation, often rather difficult to distinguish, and is exceedingly
finely serrated at the edge, almost smooth-edged. It is strongly calciferous, but thin and fragile.
First antenna: — The two bristles of the third joint are rather long, of about
the same lengtli as the following joint, the anterior one is fixed just proximally of the middle
of the joint. The anterior bristle of the fourth joint is, as a rule, somewhat shorter, the posterior
one somewhat longer than the fifth joint. The bristle of the sixth joint and the a-bristle of
the seventh joint are of about the same length as the fifth joint, the latter bristle being generally
somewhat longer than the former. The length of all these bristles varies somewhat, however.
They all have short hairs. The sensory bristle of the fifth joint is generally not quite as long
as the anterior side of the second to the fourth joints; sometimes it is only the same length as
the second and third joints. Of its thirteen sensory filaments the proximal ones are rather
long, attaining about a third to a half of the whole length of the bristle, and somewhat, though
only slightly, thicker than the distal ones; the latter are rather short, the transition in length
and thickness is, however, fairly graduai; all the sensory filaments are equally thick throughout
the whole length; the proximal ones are furnished proximally with up to four exceedingly
small, fine secondary spines, the distal ones are bare. Of the bristles on the seventh and eighth
joints (fig. 16) the b-bristle is quite short, rather slightly longer than the a-bristle (and rather
considerably shorter than the d- and e-bristles); along its proximal half it has four or five rather
short sensory filaments. The c-, f- and g-bristles are rather long; the last-mentioned one, which
is the longest, is about as long as the anterior side of the seven distal joints; of the two others
the f-bristle is the shorter. The c-bristle has ten or eleven sensory filaments, the f-bristle has
ten and the g-bristle has eleven. The sensory filaments on the b-, c-, f- and g-bristles are
furnished anteriorly with some (from zéro to six) short and rather strong spines. The simple
sensory bristles d and e are about a third of the length of the c-, f- and g-bristles. Pilosity:
The second joint is only sparsely furnished with short hairs, arranged in a few transverse rows
on the anterior and posterior margins.
Second antenn a: — k r o t o p odit e: About 1 mm. in specimens about 3,5 mm.
long. The medial-distal bristle is about as long as the second joint of the endopodite,
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