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PREFACE.
The present treatise is based for the most part on studies carried out by me at the
Zoological Institution of the University of Upsala on material belonging to the Swedish State
Museum (Riksmuseum), Stockholm. For the purpose of carrying out verificatory
investigations smaller collections have also been furnished by the Z o o 1 o g i c a 1 Museum o f
the University of Upsala, the Christiania Z o o 1 o g i c a 1 Museum, the
Copenhagen Zoological Museum and by Professors G. W. MÜLLER, Greifswald
and G. S. Brady, Sheffield. In addition the Ostracod material brought home by the ,,M i c h a e 1
Sars North Atlantic Deep Sea Expedition“. 1910 has been kindly entrusted tome forexamination.
—• In order to study the oecology of the marine Ostracods and to collect material for this
group of animais I have spent some summer months (assisted partly by grants from the
Swedish Royal Academy of Science) at the west coast of Sweden (the Zoological Marine Station
at Kristineberg) and from December 1915 till June 1916 (with a grant from the C. F.
LILJEWALCH’s travelling scholarship fund) at the Labotatoire Russe de Zoologie at
Villefranche-sur-Mer and the Musée Océanographique de Monaco.
Among the Ostracod collections in the Swedish State Museum I found the
original material of P. T. Cleve’s work of 1900 (a part of which had been already published by
C. W. S. AurIVILLIUS in 1899). On re-examining this material I verified that Conchoecia bispinosa,
C. borealis, C. elegans and Microconchoecia Clausii ( Conchoecia curta J. Lubbock) were
correetly determined. On the other hånd Paraconchoecia oblonga was incorrectlv determined;
the specimens on which this statement was based turned out to belong to Euconchoecia Chier chiae
G. W. Müllei ;. See these species below. There was only a single specimen of Conchoecetta
(= Conchoecia) acuminata-, this was a male which was not yet mature (presumably belonging to
the oldest larval stage). The length of this specimen was 2.1 mm.; the number of furcal claws
seven. As far as could be seen the correctness of its determination was fa irly certain.
In the collections of this museum there is also a part of the original material of Conchoecia
borealis, C. elegans and C. obtusata in P. T. Clevk’s work of 1903 ( P. ’I’. Clkye and O. PETTERSSON.
1903). On re-examining this material I found that the determinations were correct.
In the collections of the Zoological Museum o f the University o f
Upsala I found the
Zoolog, bidrag. Uppsala. Suppl.-Bd. 1
original material of Ph ilomedes globosus and Cypridina Reynaudii
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