Rev. A. M. Norman on Crustacea Cumacea. G1 
& female taken in the 1 Porcupine ’ has seventeen spines on 
each side of the telson, and the uropods have twenty-four 
spines on the peduncle; inner ramus, 1st joint seven, 2nd four, 
3rd three spines ; the outer ramus is longer than the inner, 
its inner margin is smooth, but the outer margin and face 
carry fifteen sette besides three terminal smooth sette. An 
immature male , measuring 10 millims., has eleven pairs of 
spines on the telson ; uropods with twenty-three spines on the 
peduncle ; inner ramus, 1st joint eight, 2nd four, 3rd three 
spines; outer ramus has only seven very small setrn on the 
external margin. The last segment of the pereion has strongly 
produced epimera, and the anterior dorsal margin is both 
strongly serrated and adorned with plumose setm. When the 
pleon is viewed from above, rows of spines are seen on each 
side of the segments; the hinder spine of each segment is 
larger than those before it; and, as seems to be general with 
the males in this genus, the spines of the fifth segment are 
the most developed *. 
‘Porcupine’ Expedition, 1869. 
Lat. 
Long. 
fms. 
Station 
6 . . 
. . 52° 25' N. 
11° 40' W. 
90 
11 . . 
. . 53 24 
15 24 
1630 
18 . . 
, . 54 15 
11 9 
183 
13. Diastylis Edwardsii (Kroyer). 
1841. Cuma Edwardsii, Kroyer, Naturhist. Tidssk. iii. pp. 504, 531, 
pi. v. figs. 1-16; id. op. cit. anden rsekkes ii. (1846), pp. 128, 207, 
pi. i. figs. 1, 3, 5, 9-14 ; id. Voyages en Scandinavie &c. pi. iv. 
1846. Cuma brevirostris, Kroyer, Naturhist. Tidssk. anden rcekkes ii. 
pp. 174, 208 ; id. Voyages en Scandinavie &c. pi. v. A. fig. 1 a-t 
(mas adultus). 
Carapace tumid, not remarkably deep or broad, occupying 
about three fifths of the length of entire cephalothorax, with 
five denticulately edged plicrn on each side, the first curving 
directly forwards and running right out to the end of the 
rostrum ; the second branching laterally from the first and 
proceeding towards the lateral margin, which, however, it does 
not reach ; the third running right down from above to the 
lateral margin; the fourth and fifth curving forwards and 
looping with the third plica, which they join ; rostrum short, 
hispid. Free segments of cephalothorax having their anterior 
margin elegantly denticulated. First pereiopods , when ex¬ 
tended forwards, reaching beyond the rostrum by the last two 
* My description of the first feet in the Brit. Assoc. Report is incorrect. 
These organs do not differ materially in the proportional length of the 
joints from D. tumida. 
