CRUSTACEA MALACOSTRACA. III. 193 



Evidently common at Grinnell Land, having been taken there at four places from Lat. 82°27' N. to 

 Lat. 79 2c/ N. in depths not exceeding 30 fath. (Miers). Through Smith Sound from Lat. 78°24' N. south- 

 wards along West Greenland to Lat. d^iy' N. (= "Ingolf" Stat. 34) it has been taken many times (see 

 Stephensen's Conspectus), the depths north of Cape York being from near 10 to at most 50 fath., but 

 further south from 50 — 60 to 220—280 fath. — In the area between Iceland and the Fseroes, and espe- 

 cially more or less near the last-named islands, the species has been taken many times, most frequently 

 in depths from 40 to 133 fath., but at Vestmanhavn in about 10 fath. (by Dr. Th. Mortensen), and 

 somewhat south-east of the Fseroes even in 620 fath., temp, -i- 015 (by Cand. mag. Ad. Jensen); 5 

 miles east of Seydis Fjord, East Iceland, it was taken in 135 fath. by Admiral Wandel, and more east- 

 ward in 299 fath., temp, -7- 0-3°, by G. O. Sars. 



At East Greenland it has been taken by the 1st Amdrup Exp. near Tasiusak, Lat. 65°37' N., 

 in 15—20 and 20—30 fath.; by the Ilnd Amdrup Exp. at Henry Land, Lat. 69°34' N., 20 fath., and in 

 Hurry Inlet, Lat. 70°5o' N., 50 fath.; by the Ryder Exp. in Scoresby Sound, Lat. 70 — 7i°3o' N., 5—25 

 fath.; in Lat. 72°26' N., Long. i9°35' W., 105 fath., and in Lat. 72°53' N., Long. 20°36' W., 96 fath.; by 

 the Danmark Exp. at a number of places from Lat. 76°4o' N. to Lat. 76°45' N. in from 8—10 to 80 — 90 

 fath., and at Lat. 77 N., Long. i87 2 ° W. on Antedon prolixa (Stephensen), finally by the Duke of Or- 

 leans in Lat. 77°357 2 'N., Long. i8°i2'W., 28 fath. (Grieg). 



Distribution. Between the Fseroes and Norway, 412 fath., temp, -f- ro°, and west of Spits- 

 bergen, 416 fath., temp. o-8° (G. O. Sars). At Ellesmere Land it has been taken near Cape Faraday, 

 5—10 fath. (Ohliu), and by the Ilnd Fram Exp. (G. O. Sars); at two places at the west coast of Baffin 

 Bay in 10 — 28 fath. (Ohlin), finally in Arctic America at Beechey Isl., ab. Long. 91 W. (Sabine). 



It may be seen that A. Baffini sometimes occurs in less deep places, down to 610 fath., of the 

 cold area, and the lowest temperature recorded is -=- ri°, in Northern Stromfjord, West Greenland 

 (Stephensen); but it has also been found in places with the temperature considerably above zero, 

 thus in 5-3°. 



135. Arcturus scabrosus Norman. 

 1904. Arcturus scabrosus A. M. Norman, Ann. Mag. Nat. Hist. Ser. 7, Vol. XIV, p. 445. 



Occurrence. This species is unknown to me. It is enumerated here because Norman's spe- 

 cimens have been dredged in the cold area south-west of the Fseroes in Lat. 6o°22' N., Long. 8°2i' W., 

 327 to 430 fath. 



Pleuroprion zur Strassen. 



This genus is closely allied to Arcturus, but it is accepted, as its forms differ materially in 

 shape, and the abdomen has only one laterally discernible segment before the large terminal segment. 

 The number of marsupial lamellae is mentioned above on p. 192. The material comprises three species, 

 one among them new. The following analytical key points out some of the best characters. 



A. End of abdomen with a median incision and two acute points. Penultimate joint of the antennal 

 peduncles without processes excepting sometimes from the distal outer angle. Three spiniform pro- 



The Ingolf-Expedition. III. %. ^5 



