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The distal parts of the baleen bristles are drawn by Gi. W. MÜLLER differently from the
type described and reproduced by me for the genus as a whole; cf. fig. 14 of A. Grimaldi.
G. W . MÜLLER’s drawing, 1894. pl. 5, fig. 15 a, is made from A. teres. An examination of a
specimen of this form showed it to have the type described by me; on account of this I have
assumed that G. W. MÜLLER has made a mistake on this point as well and have consequently
made no reservation in this character for this form in the genus diagnosis given above.
As is pointed out in the description of the genus given above, the large lateral bristle
on the comb of the fifth limb extends with its point somewhat beyond the anterior end of the
comb in all the forms investigated by me. G. W. MÜLLER draws this bristle (1894) in A. oblonga
as not ineonsiderably shorter relatively, pl. 4, fig. 50; in another figure of the same species,
pl. 4, fig. 49, this bristle is reproduced with the same relative length as I observed in the species
investigated by me. On examining a specimen from the Gulf of Naples, identified by
G. \Y. MÜLLER as A. oblonga, the same condition was observed as in pl. 4, fig. 49; because of
this I considérée! it probable that fig. 50 is incorrectly drawn in this character and have therefore
made no reservation for this species in the above genus description.
In the key that G. \Y. MÜLLER set up for this genus, 1912, p. 43 we find in no. 5 the following
statement: „Am 1. und 2. Furcaldorne finden sich zwischen den dicht stehenden kurzen Spitzen
längere Borsten in geringerer Anzahl (5 resp. 3).“ This character would distinguish only a single
species, A. quadrata G. S. BRADY. This is certainly a mistake on the part of this writer, as these
„longer bristles“ are undoubtedly no specific character for this species; on the contrary they are
certainly identical with the long ventral spines that are shown in the above description of the genus
to be characteristic of the females of all the species of this genus that were investigated by me. Similar
long spines have, as a matter of faet, been reproduced by G. W. MÜLLER himself; cf. 1894, pl. 5, fig. 23.
The genus Asterope, in the sense that it is taken in the present work, seems to be a very
natural systematic unit.
Is an additional division of this genus possible and proper?
A number of the species described by me below may fairly naturally be arranged in
smaller and presumably natural groups, and some occupy a more or less isolated position. It
seems to me, however, rather inconvénient to look upon these groups as special sub-genera,
first because we are concerned with rather small differences and secondlv because, in mv opinion,
these groups will probably prove to be very difficult or even quite impossible to distinguish
vvlien in the future the number of well investigated and described species is inereased. So far
I have distinguished three groups, which I shall subsequently call:
1) the Quinquesetae group
2) ,, Müllen ,,
3) ,, Grimaldi ,,
With reference to the descriptions of the species given below l shall give a brief account
liere of the characters that distinguish these groups:
Quinquesetae group:
Fe male: — Shell: — Seen from the side this is somewhat oblong, more or less
weakly pear-shaped, with the posterior part rather slightly larger than the anterior part.
Zoolog, bidrag, Uppsala. Suppl.-Bd. I.
Fifth limb.
Furen.
Classification
of Asterope.
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