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(J. O. Sars, 1869, nitidula (Fr. Müller, 1870), cylindrica and australia, G. S. Brada, 1890
probably belonged to this group, but, on account of the unsatisfactory descriptions of these
forms, he could not give a definite opinion as to this. Hilgendorfi, G. W. Müller, 1890 would
to a certain extent occupy a special position. ,,Hilgendorfi erinnert durch die Gliederung der
1. Antenne und die Gestalt der Furca an die Gruppe oblonga, von der freilich die Furca schon
recht wesentlich abweicht, durch die allerdings nur spärliche Bedornung der Schwimmborsten,
die starke Vermehrung der Borsten, besonders durch die Borsten am Dorsalrand der 1. Maxille,
sowie durch die Gestalt des Putzfußes an die Gruppe Lobiancoi.11
In his work of 1897 G. S. BRADY sets up a new genus, Cyclasterope, closely related to
Asterope, and diagnosed it as follows (p. 85): „The shell is more nearly spherical than is usual
in Asterope. Frontal tentacle stout, 3- (or 2?) jointed. The first joint of the mandibular foot
has a falcate masticatory process as in Asterope, but much more elabora tely spinous; the second
joint, instead of being produced backwards in an angular process, bears on its distal margin
a large tongue-like appendage which extends as far as the extremity of the following joint,
The last limb (vermiform foot) is very profusely armed with setae, many of the segments bearing
two or three on each lateral margin. In other respects the anatomy is that of Asterope.“ This
new genus was based on investigations of two new forms, C. Hendersoni and C. orbicularis. It
is not directly stated which of these two species is to be regardée! as typical for this genus; one
can, however, read between the lines that the species that is first described in the treatise,
C. Hendersoni, is looked upon as the type-species by G. S. BRADY. This assumption is fully
confirmed in G. S. Bhady’s work of 1902 a. Dere we read (p. 181): „This genus was founded on
a species taken in Madras Harbour.“ G. Hendersoni is given (1897, p. 87) as having been
„dredged ... in Madras Harbour“; C. orbicularis is stated to have come from Valparaiso.
-In the work of 1902 a just cpioted G. S. Brady describes three new species of the genus
Cyclasterope. At the same time he feels compelled to modify the diagnosis of the genus given in 1897.
On p. 181 we read: „The shape of the shell can no longer be maintained as a generic character,
several other species having been discovered, which with a very different form of shell combine
the other distinctive characters of Cyclasterope. The points which I now suggest as diagnostic
of the genus are the presence of a digitiform process on the penultimate joint of the mandibular
foot, the profusely setiferous character of the vermiform limb, each ring of which toward the
distal extremity usually supports two or three setae, and the spinous armature of the joints
of the swimming-branch of the antenna.“
In his work of 1906 b G. W. Müller adopts the generic name Cyclasterope. At the
same time he points out, however, that a differentiation of this genus cannot be carried out on
the basis of the diagnosis given by G. S. BRADY, partly because the characters given by that
author are too indefinite, partly becauseone of themisduetoincorrectobservations(themandible).
G. W. Müller then adds, p. 32: „Trotzdem scheint eine Abgrenzung der sehr kurzen, annähernd
kreisförmigen Arten, welche bei Brada die Gattung Cyclasterope bilden, nicht unberechtigt.
Dieselben charakterisiren sich scharf durch den Bau der Furca, bei der auf 3 oder 4 kurze,
kräftige, stark gebogene Dornen, welche in größerem Abstand von einander stehen, noch eine
größere Anzahl dicht stehender borstenartiger Gebilde, welche sich in ihrer Form scharf von
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