CRUSTACEA MALACOSTRACA. 113 



Occurrence. Taken three times by the "Ingolf". 



South of Jan Ma\cn : St 113: 69 31' N. L., 7 06' W. L., [309 Era., temp. -f- ro ; 3 spec. 



- 117:69° 13' 8° 23' 1003 -r-ro°;i 



North-East of Iceland: - no: 66° 44' "°33' 781 -j-o-8°;i 



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

 one at ~2 C X. L., in 1110 fm., temp, -f- 1-3°, the other in the stomach of Rhodichthys regina from 72°36' N. L,, 

 [280 fm., temp. -=- 1-4°. Olilin had a fragment from 78 19' X. L., 8° 41' E. L., 1428 fm., temp. -=- 1-4°. 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 Xorway. 



Remarks. A small addition to Sars' (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 

 lamella;, the first pair small. — The pleopods of the male resemble in most features those in Mysideis 

 insignis G. O. S. ; on the first pair (fig. 5b) 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 M. insignis), oblong-eggshaped, distally broadly rounded, with the usual basal side-process on 

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

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

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

 as in I\I. insignis. 



r 



30. Mysideis insignis G. O. Sars. 



1864. Mysis insignis G. O. Sars, Xyt Mag. for Xaturv., B. XIII, p. 245. 

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



Occurrence. Only once taken by the "Thor". 



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



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

 Norway at least to Malangen, ca. 69V3 N. U, 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. Fork, Arg. 20, 1863, p. 176. 

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



Occurrence. Once taken by the "Ingolf. 



Baffin Bay: St. 33: 67 57' X. L-, 55° 3°' W. L., 35 fm -> tem P- °' 8 °; 4 spec. 



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

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



The [ngolf-Expedition. III. 2. 15 



*A 



