26 
R. NORRIS WOLFENDEN. 
PARALABIDOCERA. 
There is no mention of any example of the genus Labidocera in Giesbrecht’s 
‘ Belgica ’ report. In the ‘ Discovery ’ collection there are a great number of specimens 
of an animal superficially resembling Labidocera, but which does not agree with any 
known species of that genus, though bearing some relation to L. ivollastoni. Between 
6 0 and 70° S. Labidocera acutifrons appears in the £ Gauss ’ collection, but is absent 
from either the ‘ Discovery ’ or ‘ Belgica ’ collections, and this genus is thus very 
sparingly represented in the Antarctic area. The copepod referred to below differs 
distinctly from any known Labidocera in the character of the swimming feet of the 
female and the five-jointed abdomen of the male, and the fifth pair of feet, and I have 
thought it better to create a genus for it. 
Characters of the genus. —Very similar in appearance to Labidocera, but a total 
absence of “ ocelli,” and of very unsymmetrical shape, the swimming feet without 
spines on the last segment of the exopodite, and the male abdomen of five segments. 
Paralabidocera hodgsoni. 
(Plate VI., figs. 1-13.) 
? l‘55-2 mm. ; $ l’G mm. long. The head is evenly rounded, produced 
forwards a little, and in front are two delicate rostral filaments. There is no trace of 
eyes, either dorsal or ventral, but in some males there are two dark spots laterally on 
the head, and in a few females a dark pigmented spot on each side, which may possibly 
have been ocelli. But considering the mode of preservation, which included freezing 
and thawing, and a long sojourn in spirit, these organs may very well have been 
present at some time, and subsequently vanished. The head is quite without any 
trace of side hooks, and separated from the first thoracic segment; last two segments 
coalesced and produced on each side into lateral expansions, but bluntly ended. 
Abdomen of three segments, the genital with large lateral outgrowths, and also 
dorsally and ventrally swollen a little; spines entirely absent; next segment also 
laterally enlarged, and anal segment small ; furcal segments a little unsymmetrical, 
the right a little longer and broader than the left; all tail bristles comparatively 
short, consisting of four apical and one lateral marginal (situated a little distal of the 
middle), all slightly thickened at the base. There is also a small accessory dorsal 
furcal bristle on each side. Anterior antenmc shorter than the cephalothorax and with 
only twenty-two distinct joints, very densely covered with long bristles. 
Proportional Length of Antennal Joints. 
1 1 
2 | 
3 | 4 
1 5 
1 6 
1 7 
| 8 | 9 | 
io | n ! 
12 1 
i3 
14 | 
15 | 1G 
17 | 18 | 
19 
1 2 0 1 
21 | 22 
10 
io | 
[ 2 | 4 
1 H 
i 
1 2 
| 3 | 3 
1 81 4| 
4 
4 
1 6 1 
G 1 G 
1 G | 7 | 
5 
1 io I 
1 o | 34 
