Full resolution (JPEG) - On this page / på denna sida - Sidor ...
<< prev. page << föreg. sida << >> nästa sida >> next page >>
Below is the raw OCR text
from the above scanned image.
Do you see an error? Proofread the page now!
Här nedan syns maskintolkade texten från faksimilbilden ovan.
Ser du något fel? Korrekturläs sidan nu!
This page has never been proofread. / Denna sida har aldrig korrekturlästs.
short hairs, is of the tube-bristle type or is well pointed distally (tbe latter character varies even
within the species). At or most frequently somewhat distally of the in iddie of this joint, laterally,
there is a single bristle, in most cases about as long as or somewhat shorter than the former one,
sometimes with short hairs, sometimes with rather long hairs at the middle, in most
cases well pointed distally. One or two of the other bristles of this joint are situated
ventero-medially at or somewhat proximallv of half the length of the joint; a group (three to five) are
situated ventrally often somewhat proximally of half the length of the joint; a group (two to
four) are situated ventrally near the distal boundary of the joint. These bristles vary to a rather
great extent both in number, length and type, not only from one species to another but also
often within the same species; a larger or smaller number of them are always of the tube-bristle
type; sometimes they all have short hairs, sometimes one or more of them have rather long
hairs at the middle. Second joint: The three bristles on this joint are either subequal or else
the dorsal one is slightly shorter or longer than the two ventral ones; they are in most cases
about as long as or somewhat shorter than this joint, always with short hairs and are most frequently
of the tube-bristle type. Of the three bristles on the end joint the middle one is rather powerful,
in most cases about as long as or somewhat longer than the second exopodite joint, finely
pectin-ated. (Its point — like the points of the two claws on the endopodite — is of about the same
type as is reproduced in my fig. 28 of C. symmetrica.) The two other bristles on the end joint
have short hairs and are tube-bristles ; the dorsal one is in most cases about as long as or rather
slightly shorter than the middle claw, the ventral one is most frequently about as long as or
somewhat longer or shorter than half the length of the middle claw. The normal type of this
limb described above agrees fairly closely with my hg. 27 of C. symmetrica. The pilosity varies
on this limb, sometimes even within the species.
S i X t h limb: — For the same reasons as in the case of the mandible, maxilla and
fifth limb it seemed to me most convenient to give here in the genus description an account of
the „normal type“ of this limb found by me; consequently in the following descriptions of
species only such characters are included as differ more or less essentially from this type.
Contrary to the immediately preceding limbs this one shows rather great dimorphism.
Male: — This is large and powerful with very powerfuUy developed musculature
and is used as an auxiliary organ in swimming. The protopodite is in most cases unjointed,
sometimes it shows a more or less distinct division into two joints. The endopodite is
only partly joined to the protopodite; remains of its musculature can be observed. In most cases
it has two (in exceptional cases one) bristles, which are most frequently subequal and about
as long as the proximal height of the first exopodite joint, .in most cases well pointed and
with rather long hairs at the middle, short hairs distally. Exopodite: First joint:
This joint usually has dorso-distally a short tube-bristle with short hairs. In exceptional
cases this bristle is not found. Laterally, somewhat disto-dorsallv of the middle of this joint,
there is usually a single bristle, in most cases somewhat shorter than the distal height of this
joint and in most cases furnished at the middle with rather long hairs and with short
hairs distally; it has a fine point. This bristle may in rare cases also be missing. More or less
scattered along the distal part of the ventral side, partly somewhat medially and partly somewhat
<< prev. page << föreg. sida << >> nästa sida >> next page >>
