164 



CRUSTACEA MALACOSTRACA. III. 



reduced. The lettering on fig. 4 a is the same as in s£ga, but it is seen that the outer plate of second 

 joint (20) is very small and the inner plate found in sEga is missing; the outer plate of first joint 

 (/ 0) is smaller than in sEga, while the inner plate (/ i is broader, very much shorter and fused, without 

 any posterior incision, with the corresponding plate of the opposite pleopod. 



Sub-Family Cirolaninae. 



Two genera are represented in the "Ingolf" area, viz. Cirolaua Leach and Eurydicc Leach. 



Cirolana Leach. 

 The material comprises only three well-known species. 



106. Cirolana borealis Lilljeborg. 

 (PI. XIV, fig. 4 a). 



1852. Cirolana borealis Lilljeborg, Ofvers. K. Sv. Yet. Akad. Forhandl. 18. Arg., 1851, \x 23. 

 ! 1890. H. J. Hansen, Vid. Selsk. Skr. 6. Rsekke, naturv.-math. Afd., V. 3, p. 321; PI. I, 



figs. 1 — 1 v. 

 ! 1897. — G. O. Sars, Account, II, p. 70; PI. 29. 



! 1905. H J. Hansen, Journ. Linn. Soc. Loudon, Zool., Vol. XXIX, p. 342. 



To the descriptions, figures, remarks on synonymy and habits given in my two papers quoted 

 I have next to nothing to add. The structure of the sympods of first pair of pleopods is described 

 above. Some additional observations on the habits of this interesting animal have been published by 

 Tattersall (Isopoda, 1905). 



Occurrence. Not taken by the "Ingolf, but Cand. mag. Ad. Jensen (in "Michael Sars") cap- 

 tured it at a single place. 



South-West of the Faeroes: Lat. 6i°6'N., Long. 9°2i' W., 210 fath., temp. 7-8°; 9 specimens on bait 



on long-lines. 



In the list on distribution of British Isopoda Tattersall (Isopoda, p. 85) indicated it as known 

 from Iceland, but that must be erroneous. 



Distribution. The summary given by me in 1905 may be reprinted with some additions. 

 This species has been taken in various places in the Kattegat, 6 and 13 to 29 fath., and the most 

 northern end of the Sound; along the southern and western coasts of Norway at least to Throndhjem 

 Fjord (G. O. Sars); in Lat. 64°48' N., Long. 6°32 r E. (G. O. Sars); south-east of the Faeroes in Lat. 6i°3i' N., 

 Long. o°39' W., 104 fath. (by the "Thor"); Shetland Isles (Norman); some places in the North Sea (Zir- 

 was); several places on the coasts of Scotland and Ireland (various authors); west of Ireland in depths 

 from 74 to 220 fath., besides on the shore, and even two specimens dug out of sand (Tattersall), and 

 south-west of Ireland in 808 fath. (Norman); in the Channel at Devon and Guernsey (Norman); various 



