HANSEN: THE ISOPODA. 111 
folded. The dorsal surface of this last segment sometimes with tolerably dis- 
tinct, sometimes with very faint median keel, and else almost all over finely 
and densely pock-marked by exceedingly numerous and very small depressions. 
(This structure is not clearly defined on the copperplate, as the depressions are 
far more numerous than in the figure, and the intervals form a kind of irregular 
reticular work.) 
Uropods. They have a very depressed peduncle and thin rami; the outer 
ramus is oblong-ovate, distally rounded ; the inner ramus is considerably 
longer than the outer, with sub-acute end. 
Color, In the six larger specimens the head, the thorax, the five short 
abdominal segments, and the basal part of the sixth segment, are yellowish 
with innumerable dark dots ; the epimera of the three, and especially of the 
two, posterior thoracic segments, and the lateral angles of the five anterior 
abdominal segments are white ; almost the whole last abdominal segment is 
grayish. In the smallest specimen the dorsal surface is darker, more grayish, 
with exception of the two last pairs of thoracic epimera and the angles of the 
five anterior abdominal segments, which are white. 
Size. The largest specimen is 20.5 mm. long, and 10.5 mm. broad; the 
smallest is 14.5 mm. long, and 8.2 mm. broad. 
Habitat, Station 3355 (Lat. 7° 12/20” N., Long. 80° 55’ W.), 182 fathoms, 
2 specimens ; Station 3389 (Lat. 7° 16° 45” N., Long. 79° 56’ 30” W.), 210 
fathoms, 4 specimens ; Station 3391 (Lat. 7° 33’ 40" N., Long. 79° 43/ 20” W.), 
153 fathoms, 1 specimen. On the labels Ido not find any mention of the 
name or names of the fishes on which the parasites must have been found. 
remarks. The species seems to be well distinguished, especialiy by the 
pock-marked surface of the last abdominal segment. No males were found. 
In the marsupium of one female I found “pullus stadii primi” of Schiódte 
and Meinert; in Figure da a leg of the second pair, and in Figure 4b the pos- 
terior abdominal segments and the uropods of one of the specimens are shown. 
This may be sufficient, as the young one in this stage is very similar to those 
of the genus Lironeca drawn by Schiódte. Unfortunately, the “pullus stadii 
secundi,” always much more interesting, was not found. 
EPICARIDEA. 
As to the division of this very rich and highly interesting family into sub- 
families the reader is referred to my above mentioned treatise on the Isopoda 
of the Plankton Expedition. Of the four sub-families admitted (the very 
doubtful Microniscine not included) only one, viz. the Bopyrine, is represented 
in the collection. Of the five species secured both female and male — but no 
young ones —are ‘present of the four species, while the fifth species is repre- 
sented only by a male and a small portion of a female. 
It is a rather unpleasant task to describe a few new forms of the Bopyrina, 
Most of the authors who have contributed to the knowledge of the group 
