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.
comparatively small number of species of which both male and female are known. I refer the
reader to the descriptions of the species and will only point out here that variations have been
observed in the backward pointing process on the basale (in some species), the equipment of the
shortest of the three ventral bristles on the first endopodite joint, the bristles proximallv of the
main bristle a of the second endopodite joint and the cleaning bristles of this joint.
Maxilla: — P r o t o p o d i t e: On the procoxale and coxale there are two verv
strongly, sometimes almost completely, reduced endites. Of these endites the proximal one was,
in ali the species investigated by me, provided with four bristles, three of which were subequal,
rather long and powerful, the fourth, situated between the two proximal of the three former
ones, was rather weak and not quite half as long as these. The distal endite is in most cases
furnished with only three bristles. which are sometimes subequal and of about the same length
and strcngth as the three long bristles of the proximal endite, while sometimes the middle one
of them is somewhat shorter. In only one species, A. oculata, was there observed between the
two distal of these three bristles a bristle of about the same kind as the short bristle on the
proximal endite. The long bristles on these endites alwavs have, at least in parts, rather long
hairs, of which those that issue from the distal part of the bristles are arranged in the
shape of a feather and are rather coarse. The one (or the two) short bristles are bare or have
very fine and short hairs. The posterior bristles in the baleen are only about a third or a half
the length of the anterior ones. The baleen bristles are widened out distally somewhat in the
shape of a lancet and are pointed (not blunt as in pi. 5, fig. 15 a, G. W. MÜLLER, 1894;
cf. p. 465 of this treatise of mine), somewhat boat-shaped (if I am not mistaken) and
furnished at the edge with exceedingly fine hairs, scarcely perceptible even with very strong
magnificat-ion (REICHERT’s oc. 4, LEITZ’s immers. cf. fig. 14 of A. Grimaldi. The posterior
bristle in the baleen is of about the same type in all the species investigated by me; it
is of moderate length, its distal part is somewhat lancet-like, inclined forwards and finelv and
closely pectinated along the ventral edge; cf. fig. 15 of A. Grimaldi. On the outside of the
protopodite there is only a single bristle; it is moderately long, and situated on the basale, about
half-way up the joint, beneath the epipodial appendage; it is of about the same type in all the
species investigated by me. On the inside of the protopodite there are a number of bristles,
which afford rather good characters for the species by their number and relative length.
Jforsally, just in front of the fastening of the epipodial appendage, there is a single bristle; I was
unable to decide with certainty whether this issues on the coxale or on the basale. Dorsa liv on
the distal part of the basale there is in most of the species one or a small number of bristles.
About half way along this joint there is ventrally one or a small number of bristles. A short
distance distally of this (them) there is in most cases a very short bristle, situated ventrally
on the joint between the baleen and a list-like medial part; this bristle is in most cases very
diffi-eult to observe with certainty on account of its small size and its concealed position. Finally
the basale has a rather long bristle ventrally and somewhat laterally close to the boundarv of
the endopodite. This latter bristle is furnished with rather long and exceedingly fine ha irs,
the other bristles of the protopodite are bare or have extremely fine, short hairs. T h e e p
i-p o d i a 1 appendag e, issuing presumably distally on the coxale, is compressed at the sides
<< prev. page << föreg. sida << >> nästa sida >> next page >>
