Remarks. This species is widely separated by the structural characters mentioned from all
the foregoing except P. 7héeli to which it stands near especially in the form of the squama, the last
joint of the mandibular palps and the comparatively plump maxillipeds and first pair of legs. But
P. Théeli according to Ohlin is 20 mm. long, thus much larger, its eye-plate shows quite a different
form and its telson is somewhat longer in relation to its breadth.
Occurrence. West Greenland: Karajok Fjord, ca. 70° 20’ N. L., 100 fm., Vanh6ffen.
28. Mysidopsis didelphys Norm.
1863. Mysidopsis didelphys Norman, Trans. Tyneside Natur. Field Club, Vol. V, p. 270, Pl. XII, figs. g—r11
(teste Norman).
! 1872. Mysidopsis didelphys G. O. Sars, Mon. Norges Mysider, II, p. 20, Tab. VII.
Occurrence. Only twice taken by the “Thor”.
South of Iceland: 63° 46'N. L., 22° 56’ W. L., 80 fm.; ca. 15 spec.
— - — 63°18’ — 21°30 — 94 —; 2 spec.
Distribution. It is known from the Shetlands, both coasts of Scotland and north-east Eng-
land, 4o—70 fm. (Norman, Th. Scott), west of Ireland in depths from a little over 50 to 199 fm. (Holt
& Tattersall), also Skager Rak N. E. from the north point of Jutland, rro fm. (Meinert) and Norway


from Christiania Fjord to Lofoten, 30—150 fm. (G. O. Sars).
29. Pseudomysis abyssi G. O. Sars.
Pl. V, fig. 5 a—5 d.
1879. Pseudomysis abyssi G. O. Sars, Arch. Math. og Naturv., IV, p. 430.
! 1885. — — G.O. Sars, Norske Nordhavs-Exp., Crust. I, p. 50, Pl. V, Fig. 1321, Pl. XX,


Fig. 18—20.
CRUSTACEA MALACOSTRACA. II3


Occurrence. Taken three times by the “Ingolf”.
