CRUSTACEA MALACOSTRACA. III. 



*9 



15 — 20 fath. and 20—30 fath., among algse. Finally the Ilnd Anidrup Exped. secured it at Jan Mayen, 

 15 fath. and 50 — 60 fath. (Already recorded from Jan Mayen by Koelbel). 



Distribution. Taken south of Spitsbergen, 70 fath., temp. 0-4° (G. O. Sars); at Lat. 75°49' N., 

 Long. 24°25' E., 42 fath., temp. -f- 1-42°, and Lat. 78°5o' N., Long. 27°39' E., 10 fath., temp. 0-2° (Ohlin). 

 The statement of G. O. Sars in the 2nd Fram Exp. is too uncertain. 



5. Ianira pulchra 11. sp. 

 (PI. I, figs. 4 a-4h). 



Description. Body broad, only about twice as long as broad; the major part of its surface 

 more or less conspicuously set with short, stiff hairs. — The head has the frontal margin considerably 

 excavated (fig. 4 a), and at its middle a rather long rostral process much longer than broad, and with 

 the end subacute or obtuse; no antero-lateral processes are found and the angles are about 90 . Lateral 

 parts of the head strongly expanded, so that the small, black eyes are very remote from the lateral 

 margins. 



Thoracic segments without dorsal processes, but their lateral parts are strongly expanded out- 

 wards ; each lateral plate is cut off transversely, with the angles distinctly, or much, rounded ; the plates 

 of second to fourth segment are, besides, deeply bifid. When the animals are seen from above, no 

 epimeral plate or process is observed; at most the first joint of the legs is just perceived at the bottom 

 of the narrow intervals between the lateral plates of the three posterior segments. 



Abdomen about half as broad again as long; its lateral margins are nearly straight and very 

 converging backwards; the postero-lateral part outside each uropod is somewhat produced backwards, 

 forming a triangle about twice as broad as long. — The median lamella of the male operculum has 

 its terminal part peculiarly shaped (fig. 4 h), as the inner half of each pleopod is produced in a rounded 

 lobe about as long as broad and directed backwards, while the outer half is a subtriangular lobe 

 directed mainly outwards, with the distinctly concave hind margin nearly transverse, and this outer 

 lobe reaches slightly beyond the base of the inner lobe. — Uropods decidedly shorter than the abdomen. 



Length of a large female 9 mm. 



Remarks. This fine species is abundantly distinguished by several conspicuous characters 

 from all other forms. The antennulse may be seen on fig. 4 a. Figs. 4 b — 4 e represent the mouth-parts 

 of the left side; these four figures may serve as types for the organs in question of the genus, and 

 their morphological composition is easily understood by aid of the explanation of the plate. It need 

 only be pointed out that the maxilliped (fig. 4 e) possesses the prcrcoxa (a) described on p. 9. 



Occurrence. Taken by the "Iugolf" at four stations. 



Davis Strait: Stat. 25: Lat. 63°3o' N., Long. 54°25' W., 582 fath., temp. 3-3°, numerous spec. 



Between Angmagsalik and North-West Iceland: Stat. 95: Lat. 65°i4' N., Long. 30°39' W., 752 fath., 



temp. 2-1°; 15 spec. 

 — — — Stat. 96: Lat. 65°24'N. , Long. 29°oo'W., 735 fatli., 



temp. 1-2°; 5 spec. 



South-West of Iceland: Stat. 78: Lat. 6o°37' N., Long. 27°52' W., 799 fath., temp. 4-5°; 8 spec. 



