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gation of this problem, partly because this species was the only one of this genus of which
there was ample material at my disposai.
I shall first give a résume of the history of the investigation of this species with a few History of
remarks about other species.
The female was described in 1853, p. 171 by W. LlLLJEBORG and was placed by this
author in the previously known genus Cypridina. In the same treatise, p. 176, an additional
new C y p r i d i n i d was described, which had been found at the same locality as the former
one. On account of the far-reaching differences that this form showed from all other species
of this group then known to this author, it was established as a representative of a new genus,
Philomedes.
In 1865 G. 0. Sars, pp. 109 and 110, gave Cypridina globosa as a representative of a
new genus, Bradycinetus. At the same time this author gave some interesting oecological
information about this species. On pp. 111 and 112 in the work mentioned we read as follows:
„Jalmindelighed har jeg fundet Børsterne paa de nedre Antenner, saaledes som de ogsaa ere
fremstillede paa Lilljeborgs Figur, meget korte, aftagende i Laengde mod Spidsen samt
ucilierede. Kun hos enkelte Individer, der forresten i et og alt stemme med de andre, finder
man den maerkelige Afvigelse, at de til de 5 sidste Led faestede Børster ere saerdeles staerkt
forlaengede og altsaa skikkede til Svømning. Herpaa blev jeg først ganske ved et Tilfaelde
opmaerksom. Blandt en Del Exemplarer, jeg havde staaende i et Glas Søvand saa jeg nemlig
til min Forbauselse, et Individ pludselig opgive den traege krybende Bevaegelse, som jeg
ifølge de nedre Antenners Bygning havde anseet som den eneste mulige for denne Slaegt og
med en eiendommelig rullende Bevaegelse gjøre en kort Udflugt op fra Bunden af Glasset.
Ved Undersøgelsen af dette Exemplar befandtes som jeg havde ventet de nedre Antenner
forsynede med lange fjaerede Svømmebørster. Paa Grund af denne Ulighed troede jeg, at
Exemplaret muligens kunde vaere en Han, men fandt ikke dette bekraeftet ved den anatomiske
Undersøgelse. Senere har jeg blandt mine Spiritusexemplarer fundet flere saadanne for
Svømning skikkede Individer og har overbevist mig om, at de ligesaavel som de med korte Borster
forsynede ere Hunner. Heller ikke er denne Ulighed afhaengig af Alderen, da jeg saavel har
fundet unge som aeldre Individer paa denne Maade udrustede. Fuldkommen lignende har
jeg ogsaa fundet Forholdet has følgende Art.“ (= Philomedes (Ph.) Lilljeborgi) .,Hos enkelte
Individer, som jeg, uagtet jeg ikke har kunnet opdage nogen tydelige Copulationsorganer.
maa anse for Hanner, vise disse Organer endnu en maerkelig Eiendommelighed, idet den kortere
Gren (Bigrenen) er betydelig større end hos Hunnerne og forsynet med et langagtigt
membranøst med 2 korte Børster forsynet Endeled, der aldeles mangler hos Hunnerne.“*
* The following translation is (with a few corrections) reproduced from G. S. Brady, 1868 b, p. 467:
„I have mostly found the set ae cd the lower antennae, as represented in LitUEBoac’s figure, very short, decreasing in lengt h
towards the apex, and non-plumose. Only in a few speeimens“ (G. S. Brady writes: but in one individual... .) ..which
in other respects agree with tho rest, one finds a remarkable variation, the setac attached lo the last five joints being
much elongated, and adapted for swimming. My attention was first drawn to this as follows. Among severat
speeimens which I had in a glass of sea-water, I saw, to my surprise, one individual suddenly abandon its slow,
creeping movement, which, from the structure of the lower antennae, I had alone thought possible for this genus
and, with a peculiar rolling movement, give a short bolind iipwards from the bottom of the glass. On examination
of the animal, I found that the lower antennae wen* armed with long swimming-sclae. On aeeonnt of this peeuliaritv.
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