studies on marines Olrarods 349 



gation of this probltMn, partly because this species was the onl}' one of this genus of which 

 there was ample material at my disposal. 



I shall first give a resume of the history of the investigation of this species with a few Hisionj of 



, , , , , . Ph. (Ph.) elobosa. 



remarks about other species. 



The female was described in 1853, p. 171 by W. LILLJEBORG and was placed by this 

 author in the previously known genus Cypridina. In the same treatise, p. 176, an additional 

 new Cypridinid 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. Ill and 112 in the work mentioned we read as follows: 

 ,,Jalmindelighed har jeg fundet Borsterne 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 Barster ere saerdeles staerkt 

 forlaengede og altsaa skikkede til Svemning. Herpaa blev jeg forst ganske ved et Tilfaelde 

 opmaerksom. Blandt en Del Exemplarer, jeg havde staaende i et Glas Sovand saa jeg nemlig 

 til min Forbauselse, et Individ pludselig opgive den traege krybende Bevaegelse, som jeg 

 ifolge de nedre Antenners Bygning havde anseet som den eneste mulige for denne Slaegt og 

 med en eiendommelig rullende Bevaegelse gjore en kort Udflugt op fra Bunden af Glasset. 

 Ved Unders0gelsen af dette Exemplar befandtes som jeg havde ventet de nedre Antenner for- 

 synede med lange fjaerede Svommeborster. Paa Grund af denne Ulighed troede jeg, at 

 Exemplaret muligens kunde vaere en Han, men fandt ikke dette bekraeftet ved den anatomiske 

 Unders0gelse. Senere har jeg blandt mine Spiritusexemplarer fundet flere saadanne for Sv0m- 

 ning skikkede Individer og har overbevist niig om, at de ligesaavel som de med korte Borster 

 forsynede ere Hiinner. Heller ikke er denne Ulighed afhaengig af Alderen, da jeg saavel har 

 fundet UJige som aeldre Individer paa denne Maade iidrustede. Fuldkommen lignende har 

 jeg ogsaa fundet Forholdet has folgende Art." (= Philomedes (Ph.) Lilljehorgi) ,,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 starre end hos Hunnerne og forsynet med et langagtigt mem- 

 branost med 2 korte Borster forsynet Endeled, der aldeles mangier hos Hunnerne."* 



* The following translation is (with a few corrections) reproduced from O. S. Brady, 1868 b, p. 467: 

 „I have mostly found the setae of the lower antennae, as represented in Ijilljeborg's figure, very short, decreasing in length 

 towards the apex, and non-plumose. Only in a few specimens" (G. S. Brady writes: but in one individual . . . .) ,, which 

 in other respects agree with th(! rest, one finds a remarkable variation, the setae attached to the last five joints being 

 much elongated, and adapted for swimming. My attention was first drawn to this as follows. Among several 

 specimens 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 i)ound upwards from the bottom of the glass. On examination 

 of the animal, I found that the lower antennae w-ere ai'nu>d with long swimming-setae. On account of lliis pcrnliarily. 



