TThen sorae time ago I commimicated to Professor \V. Lilljc- 

 borg my last carcinological uovclty, Acgiocliiis Nordcnskiöldii, 

 hc told me tliat somethiug like it cxistcd in tlie collections 

 of tbo zoological inuscum of thc Uuiversity of Upsala. And, 

 iudecd, by rcvising tlie undetcrmined Crustacca of thc mu- 

 seum, I fbund thc spcciracn describcd below. It bad been 

 presented to the museum by Colouel F. Bohm, of Upsala, 

 who caught it on thc gills of a whitiug at Marstrand, on the 

 wcst coast of Swedeu, in the suramer 1880. 



A close inspection of the animal shoAvs it to be a mem- 

 ber of the family Aegidae, and ncarly allicd to the genus 

 Rocinela. It differs from all known species of that genus by 

 the total want of eyes, thc very multiarticulate flagellum of 

 thc second pair of antennas, thc less complicated form of the 

 mandibles, the incquality of thc epimerals, and the uncom- 

 raonly long walking legs. 



Scen from above its general habitus resembles the draw- 

 ing of Ilarponyx pranizoides, given by G. O. Särs in his: 

 »Oversigt av Norges Crustaceer med förelöbigc Beraa^rkninger 

 om de nye eller mindre bekjendte Arter» ^), and but for the 

 lacts mentioned by Särs about thc epimerals and thc numbcr 

 of thc legs I should feel very much inclined to placc it in 

 the genus Harponyx. After his description it is impossible 

 to do so, as Harponyx, if not a young form ^), is widcly se- 

 parated from all the othcr Aegida3 by the want of the seventh 

 pair of legs, the numbcr of the epimerals, and perhaps also 



') ( 'liristiaiiia Videnskabsselskabs Forhandlinger 1882 N;o 18, pay'. (>. 

 pl. 2. fig. 1. 



') Ac(iacijUa. Dana, is perhaps thc nearest relativc to Harponyx. and 

 both wcll developed larvas of some large Kocinela. 



