100 
suddenly narrower than the first segments. In regard to the man- 
dibles (figs. 7—8) the specimen from the Tjalfe” is very like Munn- 
opsis longicornis H. J. Hansen (Ergebnisse d, Plankton-Exp., vol. 
2Gc, Isop., Cumac. und Stomatop., 1895, p. 8, Pl. 2, fig. 1—1d), 
whilst the mandibles in M. typica are quite different from these. 
Walker gives no fig. of the mandibles of 
M. Murrayi (Tattersall has a fig.: Fisheries, 
Ireland, Sci. Invest. 1904 pt. 2, (1905) Pl. 5, 
fig. 8); but he writes (1. c. 1903 p. 228) ,,;man- 
dibles with a prominent molar expansion and 
divided cutting edge as in M. Zongicornis Hansen; 
" palp very large and prominent, with a lamellar 
terminal joint. As G.O.Sars has pointed out, 
Munnopsis longicornis Hansen differs in the struc- 
ture of the mandibles from the generic descrip- 
tion, as does the present species" (MM. Murrayi). 
The sculpture of the dorsal surface is very 
like that in M. Murrayi; the few differences may be 
seen from the fig. (fig. 6). Of ant. 1 the mutual 
length of the joints is quite another than in M. 
typica, Ath and 5th joints being longer than 
Fig. 6. the others. Also the flagellum is different, Ist 
Munneurycope joint being very short and the second very long; 
Anikeneis the other joints (only 6 are preserved) are about 
4 times longer than their diameter. Of ant. 2 only two joints of 
the stem are preserved; they are of about equal length. Labrum 
is very prominent, has the usual form and 3 cross-furrows. The 
oral parts agree very well with those in M. Jongicornis and M. Murrayi, 
whilst the mandibles as mentioned are very different from those in 
M. typica, Of the 4 pairs of ambulatory legs only some single 
joints are preserved. Of the natatory legs the 4 first joints are 
preserved; the 4th joint has the same form as in M. Murrayi and 
is a little broader than in M. Jongicornis, but much broader than 
