BJHANG TILL K. SV. VET.-AKAD. HANDL. BAND 26. AFD. IV. N:0 12. 25 



northeast of Ft^eröe Islands in a depth of about 2000 ni. and, 

 by the same expedition, in 1S77 and l.s7S at three more sta- 

 tions, all located in the northern continnation of that deep 

 tract of the ocean between Norway, Beeren Eiland, and Spitz- 

 bergen on the one side, and Iceland, Jan May en, and Green- 

 land on the other. It must be remarked that the station 

 where I trawled it — the so called Swedish Depth nntil 

 189^ considered much deeper than it proved to be on our ex- 

 pedition by means of more accurate methods of sounding — 

 belongs to the same deep pit in the bottom of the North 

 Atlantic and Arctic oceans. Nowhere else, except in this 

 »cold area» of Mohn where the bottom temperature is below 

 ± 0° C, has the species in qiiestion as yet been found. 



Särs himself regarded this form at first as a variety of 

 Ghjjdonotus Sfihlni, and Miers in his »Revision of the Ido- 

 teidi£> 1. c. p. 15 doubts »whether the characters assigned to 

 the Chiridothca niefjaliira of Särs ean be regarded as of speci- 

 iic importance*. In his låter works Särs has described it as 

 a different species, thongh very closely approximating to 

 Glyjdonotns S(ilnnii. As the most important characteristics 

 be regards the far greater size, the deviating shape of the 

 last segment, and the uniform grayish coloiir. 



It is only with great hesitation that I regard it as 

 specifically distinct from Kröyer's typical liloihca Salnni 

 pictnred in Voyage en Scandinavie etc.» pl. 27, fig. 1 a — o 

 and described by him the following year (1847) in his classical 

 »Karcinologiske Bidrag* 1. c. p. 3i*4. 



After a careful examination of my niimerons specimens 

 of both sexes, and on different stages, and after coraparison 

 with the type species, I find that ChirUlothea mrijaJnrtt de- 

 viates in the following respects. 



Tlie terminal segment is relatively sh orter and Ijroader 

 than in ('Idriäothca Sahini or Ch. cntomon. This is most 

 pronounced in young ones or females. Old males ressemble 

 in this respect jnore Cli. Sahini (fig. 4 a— d). The extreraity 

 of the last segment is, in all specimens I have examined, 

 prodnced in an npwards curved point which is a little sharper 

 than in the typical species. 



Another distinction whi(^h I think is worth trusting to, 

 but which Särs does not seeni to have observed, is that there 

 are to be found in Chiridot/im Sahini and 67/. cntomon four 



