106 MR. F E. BEUDARD ON ISOPODA COLLECTED [Feb. 2, 



has two joints, the distal one being very minute. The antenna 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, uov. geu. 



A single specimen of a deep-sea Isopod dredged at Station 215 

 does not fall very conveniently within any known genus of the 

 Asellida. 



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 antennae 

 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, n. sp. 



The specimen is an immature female, measuring 5 niilhm. 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 segments 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 

 antenncB are about equal in length to the body ; 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 have a 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, 

 vvhich appear to contain no pigment and are not faceted. The largest 



