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armed with powerful lateral teeth, of which the distal unes, beginning first a little way from
the point of the bristle, are usually the most powerful; they are never furnished with long,
stifï side-bristles and in most cases, contrary to all the other bristles of this joint — and most
of the bristles on this limb — they are not annulated. — G. W. MÜLLER makes these bristles
form a „tooth“ togetlier, comparable to the „main tooth“ of the preceding joint; see
G. W. MÜLLER, 1912, p. 9, fig. 7. J have not considered that I ought to follow this method
of procedure — although it is compréhensible —- because these bristles do not together form
quite so pronounced a morphological unit as do the bristles through the union of which the
„main tooth“ must be regarded as having arisen. They are, on the contrary, quite free basally,
at least in all the species of this sub-family that I myself have had occasion to investigate. —
Somewhat outside and in front of these bristles there is a somewhat irregularly arranged collection
of, for the most part, rather long and powerful, strongly pectinated bristles; in these, too, the
anterior ones are rather considerably longer than the posterior ones; in addition the inner ones
of them are most frequently somewhat longer than the outer ones; their pectination, which
continues right to the point of the bristles, is somewhat weaker distally than in the
middle; like the bristles in the last-mentioned group these bristles, too, are without
long secondary bristles (one exception: Cypridina (Gypridina) serrata var. affirmans).
Besides these bristles there are in all the species of this sub-family described in this treatise
two additional bristles on this joint, one close to the last-mentioned group of bristles on
the posterior side of the joint and one on the anterior side of the joint close to the folio
w-ing joint. The two or three distal joints are fitted with a somewhat varying number of
generally rather weak bristles.
Sixth limb: — Without or at any rate with only very weak sexual dimorphism.
— It varies rather much in type.
Seven th limb: — This has no or only very weak sexual dimorphism. — The
number of the cleaning bristles varies very much: in so me species there are only a few (8—10),
in others they are very numerous, as many as a few hundred being found. The teeth of the
end comb vary similarly very greatly in number; while in some species only a small number
(5—6) are to be found, they are in other forms very numerous (100—150); their usual number
is about 14—20. Within eacli species the variations in number of the cleaning bristles and the
teeth of the end comb are rather limited. In most forms the distal teeth of the end comb are
distinguished from the proximal ones by their type. The former are in most cases somewhat
longer and narro wer than the latter and are rounded or even pointed distally; the latter,
which are situated proximally close to the former about symmetrically on each side of the
extremity, are distally cut off more or less sharply. In other respects the distal part of this
limb varies somewhat in type.
The brush-shaped organ is very seldom found; among all the species of this
sub-family included hitherto in the literature only the female of Cypridina squamosa G. W. MÜLLER
has been established as possessing it; cf. G. W. MÜLLER, 1894, pi. 2, fig. 81. I have not succeeded
in finding this organ in either the males or the females of any of the species of this sub-family
that are described in this treatise.
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