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Although it is quite impossible to identify a species of this group merely by the general
shape and appearance of the shell, a faet that is clearly shown in this treatise, subséquent
writers have, obviously without any re-examination of Baird’s type-specimen, succeeded, as
in the case of A. teres (A. M. NORMAN), not only in identifying forms investigated by themselves
with this species of Baird’s, but also in synonymizing with it forms described in a more or less
unidentifiable manner by other writers and obviously not investigated by themselves. This
can only be explained as being due to these writer’s deficient knowledge of this genus.
Cypridina oblonga GRUBE, from the Adriatic Sea, has, according to the original
description and figures, a shell that agrees very elosely both in shape and length — 1,55 mm.
-with W. Baird’s Cypridina Mariae. The limbs and the furca of this species are described,
but so incompletely that it is impossible to identify it with certainty, but still this form may,
although hesitatingly, be referred to the same group of the genus Asterope as the form of
Baird’s has been with a reservation referred to above. Without going in to details as to the
peculiarities in GRUBE’s description and figures that are obviously due to mistakes in
observation on the part of this writer, the following characters that appear to distinguish this species
may be mentioned liere: The mandi ble has no bristles at all at the middle of the
dorsal side of the basale. The s i x t h 1 i m b has only fifteen posterior ventral bristles.
The seve n th li mb has eleven bristles, of which six are sitiiated distally, three on eacli
side, and five somewhat more proximally, four on one side and only one on the other.
G. S. Brady’s C y lindr oleberis Mariae, 1868 b, which was found off Scotland and in the English
Channel, differs exceedingly with regard to its shell from this species of Baird’s: „Carapace
as seen from the side, oblong-elliptical, more than twice as long as high, rather higher in ’front
than behind.“ The shell is 2,3 mm. long. Brady’s description and figures of the limbs and the
furca are very incomplete and obviously incorrect, so I shall not diseuss them at any length
here; although they thus do not permit of certain identification they clearly show that the
species in question certainly belongs to the same group of the genus dealt with here as that to
which the above forms of Baird’s and GRUBE’s have been referred. The difference in the
shape of the shell from the former species is clearly due to the faet that Brady has described
and drawn a mature male while, as has been shown above, Baird had a mature female or a
larva. The rather strongly marked dimorphism in the shape of the shell has not, if we are
to judge from the text, been noticed by BRADY, a faet that did not, however, prevent this author
from identifying the form examined by him with that of Baird.
G. O. Sars, 1887, states that the species Asterope oblonga (E. Grube) was found at four
localities in the Mediterranean and in the Bay of Biscay*. Both the male and the female are
described. This form certainly belongs to the Grimaldi group of this genus. The shape of the
shell is that which is characteristic of this group. Length, 2,07 mm,, 1,7 mm., £.
S e c o n d ante n n a: The endopodite has a very short bristle distally on the second joint,
M audible: At about the middle of the dorsal side of the second protopodite joint there
is a single bristle. which is about as long as the dorsal side of tins joint. The exopodite is very
* 1 applied in Professor Saks for the specimens mentioned in order to re-examinc them, but was informed that
unlortuuately they had all been lost beyond any hopc of recovery.
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