CRUSTACEA MALACOSTRACA. 



"3 



Occurrence. Taken three times by the "Ingolf. 



South of Jan Ma\en : St. 113: 69" 31' N. L., 7° 06' W. L., 1309 fm., temp. -4- i'0°; 3 spec. 

 — - — - 117: 69° 13' — 8° 23' — 1003 — — -=- i-o°; I — 



North-East of Iceland: - no: 66° 44' — 11° 33' — 781 — — -=-o-8°; i — 



Distribution. Sars had 2 specimens, both taken between North Cape and Jan Mayen, the 

 one at 72° N. L., in mo fm., temp. -4- 1-3°, the other in the stomach of Rhodiclithys regii/a from 72° 36' N. L., 

 1280 fm., temp. -^ 1-4°. OhHn had a fragment from 78° 19' N. L., 8°4i'E. L., 142S fm., temp. -=r i-4". The 

 species thus dwells in considerable depths with low to very low temperatures, always negative, in the 

 Northern Ocean between Iceland, East Greenland, Spitzbergen and Norway. 



Remarks. A small addition to Sar.s' (and Ohlin's supplementary) description may be given 

 here. My best specimens are from St. 117; the one of these is a female with marsupium measuring 

 ca. 45 mm. from the tip of the rostrum to the end of the telson, whilst a male is 42 mm. long. The 

 eye-stalks differ a little in form; the most distal part is sometimes more developed than Sars gives it, 

 in form like a conical process pointing forwards (fig. 5 a). — The female has 3 pairs of marsupial 

 lamellae, the first pair small. — The pleopods of the male resemble in most features those in Alysidcis 

 insignis G. O. S. ; on the first pair (fig. 5 b) the outer branch is but little longer than that of the 

 fourth pair, whilst the inner branch (fig. 5 c) is very short (yet by comparison considerably larger 

 than in RI. ii2sionis\ oblong-eggshaped, distally broadly rounded, with the usual basal side-process on 

 the outer margin. The II"'' — IV"" pairs are almost the same both in form and length of rami; in the 

 IV"' (fig. 5 d) the exopod is but little longer than the endopod, but the penultimate joint half as long 

 again as the antepenultimate, and there are no thick terminal seta; with hairs covering the one side 

 as in M. insignis. 



30. Mysideis insignis G. O. Sars. 



1864. Mysis insignis G. O. Sars, Nyt Mag. for Naturv., B. XIII, p. 245. 

 ! 1879. Mysideis insignis G. O. Sars, Mon. Norges Mysider, III, p. 2, Tab. IX— X. 



Occurrence. Only once taken by the "Thor". 



South of Iceland: 63° 15' N. L., 22° 23' W. L., 114- 172 fm.; ca. 10 spec. 



Distribution. The .species has been taken in Christiania Fjord and along the we.st coast of 

 Norway at least to Malangen, ca. 69^/3° N. L,., in 50 to 300 fm. (G. O. Sars, Nordgaard). It was next 

 taken west and south-west of Ireland in depths from a little over 50 to 372 fm. (Norman, Holt & 

 Tattersall). 



31. Stilomysis grandis G. O. Sars. 



1864. Mysis grandis A. Goes, Of v. Kgl. Sv. Vet. Akad. Forh., Arg. 20, 1863, p. 176. 

 ! 1879. Mysideis grandis G. O. Sars, Mon. Norges Mysider, III, p. 106, Tab. XLI— XLII. 



Occurrence. Once taken by the "Ingolf". 



Baffin Bay: St. 33: 67° 57' N. L., 55°3o'W. L., 35 fm., temp. o-8°; 4 spec. 



In Malac. Groenl. it is noted from an adjacent place in Baffin Bay: 67°4'N. L., 54^ 28' W. L., 

 32 fm., 2 specimens; later, some specimens were taken at Jakobshavn, 69° 13' N. L., by Traustedt. 



The Ingolf-Expedition. HI. 2. I5 



