21 
Remarks. —This species is easily distinguishable from the preceding one 
by the much shorter and more robust form of the body, the acutely produced 
pseudorostral projection, and the absence of the oblique lateral folds on the cara¬ 
pace. Moreover, the 2nd pair of legs and the caudal appendages exhibit well 
marked differences, and the colour is also different. Finally, the adult male 
is well characterised by the peculiar structure of the inferior antennae, the prehen¬ 
sile nature of which is more pronounced than in any other known Cumacean. 
Of this species also I have succeeded in preserving specimens of the 2 sexes still 
locked together in copulation. The mode in which the female is grasped by the 
male is exactly as in the preceding species. 
Occurrence. —This species seems to be a true arctic form, as I have 
never met with it off the south and west coasts of Norway, whereas in the arctic 
region it is very common, from the Lofoten Islands to Vadso. It is generally 
found in places similar to those in which the preceding species occurs. 
Distribution. —Greenland (Hansen), Franz Joseph Land (Th. Scott). 
Gen. 2. HemilamprOpS, G. O. Sag, 1882. 
Generic Characters. — Body, as a rule, very slender, with the anterior and 
posterior divisions generally less sharply marked off from each other. Carapace 
not very large, without any subrostral sinus, the antero-lateral corners being quite 
obsolete, pseudorostral projection more or less distinct. Eye well developed or 
wanting. Superior antennae with the flagella comparatively longer than in Lam- 
props; inferior antennae in male normally developed. 1st pair of legs slender and 
elongated, with the terminal part much longer than the basal joint; 2nd pair 
likewise slender. 3rd pair in male more or less transformed. 3 pairs of well 
developed pleopoda present in the male. Telson and uropoda of a similar struc¬ 
ture to that in Lamprops. 
Remarks. —This genus was proposed by the present author in the year 
1882, to include some species formerly referred by him to the genus Lamprops, 
but materially differing in the sexual characters of the adult male. Otherwise 
the 2 genera are closely related, exhibiting the very same structure of the ter¬ 
minal caudal appendages. The genus comprises, as yet, 5 species, one of which, 
H. Normani, has recently been recorded by M. Bonnier from the Gulf of Gas¬ 
cogne, the 4 others belonging to the Norwegian fauna. 
