106 MR. F. E. BEDDARD ON ISOPODA COLLECTED [ Feb. 2, 
has two joints, the distal one being very minute. The antenne have 
a five-jointed peduncle and four- or five-jointed flagellum ; the third 
joint of the peduncle is longer than the two basal joints, the fourth 
joint is shorter than the third, the fifth longer. The thoracic 
appendages are all similar and biunguiculate. 
Off Marion Island, 100 fathoms. 
Genus TRICHOPLEON, nov. gen. 
A single specimen of a deep-sea Isopod dredged at Station 215 
does not fall very conveniently within any known genus of the 
Asellide. 
The general shape of the body is like that of Asellus, with which 
it also agrees in the uniunguiculate thoracic appendages ; eyes are 
completely absent ; the first four thoracic segments are furnished on 
either side with a forwardly-directed lateral spine. The antenne 
have a movable scale attached to the second joint, as in Janira and 
Stenetrium. The surface of the body is quite smooth. 
1. TRICHOPLEON RAMOSUM, 0. Sp. 
The specimen is an immature female, measuring 5 millim. in length. 
The head is narrower, but longer than the succeeding segment of 
the thorax; it is prolonged into a short wide process anteriorly. 
There is no trace of eyes. The three first segments of the thorax are 
subequal in length; the fourth segment is shorter; the three 
posterior seginents gradually increase in length but diminish in 
breadth ; the antero-lateral margin of the first four segments is 
furnished with a short, acute, forwardly-directed spine. The abdomi- 
nal shield is oval, but wider anteriorly than posteriorly ; it terminates 
behind in the middle line in a short spiny process. The antennules 
are about as long as the head and first two segments of the thorax 
together ; the peduncle has four joints, of which the second joint is 
the longest; the flagellum consists of about fifteen joints. The 
antenne are about equal in length to the bedy; the flagellum is 
longer than the peduncle ; the two basal joints of the peduncle are 
very short, the third a trifle longer, with an articulated scale on the 
outer side ; the two distal joints are long and subequal. The mandi- 
bles havea palp. The thoracic appendages are similar to each other, 
terminating in a single claw. Uropoda moderately long, biramose, 
each ramus one-jointed. 
Station 214; 500 fathoms. 
Fam. ARCTURID&, 
Genus Arcturus, Latreille. 
1. ARCTURUS MYOPS, N. sp. 
The present species differs from any other Arcturus at present 
known by the fact that the eyes are entirely or almost entirely 
aborted. The only trace of eyes left are a pair of rounded tubercles, 
which appear to contain no pigment and are not faceted. The largest 
