studies on marines Otracods 349 



gation of this problem, partly because this species was tlie only one of tliis 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 History of 

 remarks about other species. ' '''''• ^^''-^ ^^'"'"'■ 



The female was described in 1853, p. 171 by W. LILL.IEBORG 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 Gr. 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 Lilljeeorgs 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 Berster ere saerdeles staerkt 

 forlaengede og altsaa skikkede til Svomning. Herpaa blev jeg forst ganske ved et Tilfaeldc 

 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 gJ0re en kort Udflugt op fra Bunden af Glasset. 

 Ved Undersagelsen af dette Exemplar befandtes som jeg havde ventet de nodre 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 Svom- 

 ning 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 felgende iVrt." (— Philotriedes (Ph.) Lilljeborgi) ,,Hos enkelte 

 Individer, som jeg, uagtet jeg ikke har kunnet opdage nogen tydelige Copulationsorganer. 

 maa anse for Hanner, vise disse Organer eiidnu en maerkelig Eiendommelighed, idet den kortere 

 Gren (Bigrenen) er betydelig storre end hos Hunnerne og forsynet med et langagtigt mem- 

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



* Tlu' following translation is (with a few corrections) reproduced from G. S. Bhady, 1868 b, p. ifiT: 

 ,,I have mostly found the setae of the lower antennae, as represented in Lilljeborg'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 the rest, one finds a remarkable variation, the setae attached to tjie last five joints being 

 much elongated, and adapted for swimming. My attention was first drawn to this as r<ilU)Ws. .\mong 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 bound upwards from the bottom of the glass. On e^faminalion 

 of the animal, I found thai the lower anlinnae wiMr ai-iui'd willi lung swimming-selai'. On aicoinit of this pcculi irity. 



