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.
(about the same as in the male of A. curta) and have no proximal spines. The tsvo or three
posterior claws are annulated.
The lateral eyes are somewhat larger than those of the female.
Material.
The species captured
ojf the coasl oj
! friand’!
Remarks: — This species was introduced into the literature by G. Ü. Sars, 1869, p. 357.
Although the original description is very deficient and is not illustrated by any figures, it has,
all the same, seemed possible to succeeding writers who have dealt with these questions to
identify it. Even G. W. Müller includes it, 1912, p. 45 as identifiable. This author writes
about this species (1. c.): ,,Der A. abyssicola sehr ähnlich, wenig gestreckter. 3. Thoraxbein
mit 10 Borsten. Furca mit 5 Dornen, denen noch 2 Borsten folgen. Größe A und $ 1,34 mm.“
The comparatively small number of cleaning bristles on the seventh limb and of claws
on the furca and the small length of the shell made me begin to suspect that G. O. Sars had
based his description on a specimen that was not y et mature. This suspicion seemed, however,
to be directly contradicted by the faet that G. S. BRADY and A. M. Norman, who, to judge
from the figures of the shell that they add, had mature specimens to investigate — ,,specimens
for which we are indebted to Professor SARS“ — gave the saine length of shell in their work of
1896 as G. 0. SARS had given and merely quote Sars’s description for other characters. On the
other hånd this suspicion was confirmed still more strongly by a statement of G. 0. Sars himself,
as this author writes, 1887, p. 31 (203): ,,Naervaerende Art“ (- A. oblonga, length Ç 1,7 mm., A
2,07 mm.) „upnaar saaledes gjennemgaaende en betydeligere Størrelse end foregaaende, skjøndt
den i denne Henseende staar adskilligt tilbage for den nordiske Art A. norvegica
In order to decide this point I wrote to Professor Sars asking if it was possible to
re-investigate the type specimen of this species. In reply to this question Prof. Sars communicated
to me that unfortunately it was quite certain that this specimen was lost, but he sent me at the
same time two specimens, a mature female and a mature male, which he had determined as
specimens of A. norvegica. I could not of course decide with absolute certainty whether this
identification of Prof. Sars’s was correct; as, however, the original description does not seem
directly to contradict it, I have accepted it.
The result of the investigation of these specimens is given in the re-description of the
species given above. As is seen best from a comparison between Sars’s original description
and my new description, it fully confirmed my suspicion that the type specimen had not
be en mature.
It does not seem impossible, however, that the specimens investigated by me are the
same as were previously investigated by G. S. BRADY and A. M. Norman, on which they based
their information in their work of 1896. In this case it is a good illustration of these investigators’
methods of work.
As will be seen from a remark under A. aberrata 1 had sent me a specimen caught in
Strangford Lough, Ireland, which was defined by Prof. G. S. Br AD Y as A. Mariae (W. Baird)
and which after a careful investigation proved to be a male in the penultimate larval stage,
* „The present species Ums alwuys allai ns a considerably great er size than the procedi ng one, although ils dimensions
are considerably smaller than the Scandinavian species A. norvegica
<< prev. page << föreg. sida << >> nästa sida >> next page >>
