ARKIV FOR ZOOLOGI. 



RAND 1. 



Two new species of the genus Euconaxius. 



By 



FILIP TRYBOM. 



With 2 plates (Pl. 20, 21). 



Communicated December 9th 1903 by Hj. Théel and Chr. Äurivillius. 



Since the description by Leach of the genus Axius toge- 

 ther with the species stirynchus, 1 and since Bell 2 delinea- 

 ted and fully characterized the former, there has been des- 

 eribed — as far as I know — only one new species from northern 

 European waters. Fe. Meinert described a specimen, from 

 Nymindegab on the west coast of Denmark, as Axius noclulo- 

 sus, in "Naturhistorisk Tidsskrift", 3dje Reekke, lite Bind 

 (Kjobenhavn 1877 — 78) p. 212. In the meantime many spe- 

 cies of the genus Axius Leach and of the allied genus Calo- 

 caris Bell have been discovered in other regions. Of the 

 characteristics mentioned by Bell as distinguishing Axius 

 and Calocaris from each other, hardly more than one can 

 be said to survive as peculiar to Calocaris, and that is the 

 greatly diminished size of the eyes ("rudimentary, subglobose, 

 without any pigment or corneae" Bell, p. 231). 



In his work: "Report on the Crustacea Macr." etc. ("The 

 Voyage of H. M. Challenger, ZooL, Vol. XXIV 1888) C. 



1 W. E. Leach: "A tab. view of the external Characters of four class- 

 es of Animals, which Linné arranaed under Insecta" etc. The Träns, of the 

 Lin. Soc. of London. Vol. XI. Part the First. 1813, p. 343. 



2 Th. Bell: "A Historv of the British stalk-eyed crustacea". London 

 1853, p. 227—230. 



