1886.] DURING THE VOYAGE OF H.M.S. ‘CHALLENGER. 105 
Genus Jantra, Leach. 
1, JANIRA ABYSSICOLA, N. sp. 
The present species is represented by a single female example, 
dredged off Fiji in very deep water. 
The head has a rounded anterior margin ; the eyes are completely 
absent. The first three segments of the thorax are of about equal 
length ; the next two segments are much shorter, being about one half 
the length of the anterior segments; the sixth segment has an 
antero-posterior diameter about equal to that of either of the anterior 
segments, while the seventh segment is longer than any. The 
antenne are longer than the body of the animal; the flagellum is 
much longer than the peduncle. The mandibles have a palp. The 
thoracic limbs are all similar to one another. The uropoda are as 
long as the abdominal shield ; they are biramose; the endopodite is 
stouter and longer than the exopodite. 
Station, 1350 fathoms. 
2. JANIRA TRISTANT, N. sp. 
The head is broader than long, with very large, laterally placed 
eyes ; it is prolonged into a long stout rostrum with a rounded 
extremity. The first two segments are of about equal length; the 
three succeeding segments progressively diminish in length; the 
last two are again somewhat longer. The abdominal shield is sub- 
pentagonal and terminates in ashort blunt process. The antennules 
have a long flagellum ; the peduncle is composed of four joints, all of 
which are short. The mandible has a three-jointed palp. The 
thoracic appendages are all similar to each other. 
Off Tristan da Cunha, 100-150 fathoms. 
Genus Ja@ropsis, Kohler. 
1. J@ROPSIS MARIONIS, N. sp. 
The only previously known species of this genus was described by 
M. Kohler, from the island of Sark; the present species was 
dredged off Marion Island in 100 fathoms. The single specimen 
measures 4 millim. in length. 
The head is roughly quadrangular in outline ; the anterior margin 
is prolonged between the antenne into a rostrum, which is deeply 
notched at the extremity; the eyes are of fair size, and dorsal in 
position ; the lateral margins of the head are-serrated. The head is 
about as long as the first two segments of the thorax taken together ; 
the latter are subequal, the third is slightly shorter, the fourth and 
fifth subequal and very much shorter again; the last two segments 
are quite as long as the two first ; the segments are separated by deep 
lateral incisions; the lateral margins of the segments are feebly 
serrated. The abdominal shield is somewhat triangular in outline, 
and terminates posteriorly in a three-jointed process; in the two 
notches separating these processes lie the uropoda; the Jateral 
margins are serrate. ‘The antennules are very short; the flagellum 
