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.
pointing backward when in a position of rest; it is without any aecessory saccules. The
c-bristle is straight and rather short, about as long as the proximal height of the second joint.
Ail the joints are quite bare. In the first joint there are often some yellowish-brown corpuscles.
Second antenna: — Protopodite: In specimens whose shells were about
2,2 mm. long this measured about 1,0—1,1 mm. Exopodite: The proportion between the
length of this branch and that of the protopodite is about 1 : 2. The proportion between the
length of the first joint and the total length of the eight following joints is about 2:1. The
proportion between the length of the longest natatory bristles and that of the exopodite is about
7 : 4. The first joint, ät least as far as I could observe with Reichert’s ocidar 4 and Leitz’s
immersion yi8, is quite srnooth. .Endopodite (figs. 6 and 7): First joint: The processus
mammillaris has in most cases a small verruciform distal process. The a- and b-bristles most
frequent ly have short hairs at the middle and are bare distally. Second joint: The c- and
d-bristles are in most cases somewhat shorter than this joint and have short, fine hairs or are
almost quite bare. The e-bristle is extremely short. The f-bristle is about one and a half times
the length of the protopodite, sometimes even somewhat longer; it grows gradually narrower
distally and is bare. The g-bristle is, contrary to what is the case in most of the other species
of this genus, shorter than the f-bristle; it attains only about a half or two-thirds of the latter’s
length; it is not at all or only slightly widened distally and is furnished in most cases with short
hairs. The f- and g-bristles have no proximal swellings. Third joint: The clasping organs are
of about the types reproduced by G. W. MÜLLER, 1906 a, pl. XIII, figs. 21 and 22. The h-,
i- and j-bristles are subequal, about a third or a quarter of the length of the f-bristle; along the
greater part of their length they are about as broad as the proximal part of the g-bristle; they
are not widened proximally and have only rather slightly developed shafts; they are bare.
There are sometimes some small yellow corpuscles in the protopodite and the endopodite.
Man di b le: — Protopodite: Coxale: The toothed edge on the pars incisiva
has from about ten to twelve teeth. The distal tooth-list is of about the same relative size and
type as has been described for C. oblonga above; the number of teeth varies somewhat, from
about twenty to thirty were observed. The proximal tooth-list is rather slightly narrower than
the distal one; there are a somewhat varying number (about fourteen to twenty) of teeth, in most
cases srnooth and conical, arranged more or less distinctly in a simple row; the posterior ones
of these are rather large and powerful, the others decrease either (as in the accompanying fig. 10)
rather uniformly in size and strength the more anteriorly they are situated, the anterior ones
being rather small and weak, or else this decrease in length and strength is rather irregulär.
This tooth-list is furnished on the inside with numerous short, fine spines, situated close together.
The masticatory pad is of about the same relative size and type as has been described above
for C. oblonga. The part of the pars incisiva that is surrounded by the row of bristles also shows
signs of being developed as a masticatory pad. The lancet-bristles are, as C. Claus pointed
out, 1891 a, p. 63 ,,zur Seite gedrängt, in dem dichten Borstensaum mehr oder minder versteckt“.
Basale: The six teeth on the distal edge of the endite are furnished with rather fine serrate teeth.
The single tooth on the outside of this process is of about the same type and size as in my
fig. 19 of C. symmetrica; in most cases it is moderately strongly serrulated along the greater
<< prev. page << föreg. sida << >> nästa sida >> next page >>
