6 THE VOYAGE OF H.M.S. CHALLENGED 



Janira abyssicola, F. E. Beddard. 



Janira abyssicola, F. E. Beddard, Froc. Zool. Soc. Lond., 1886, pt. i. p. 105. 

 The present species is represented by a single female example from the great depth of 

 1350 fathoms, off Kandavu, Fiji. It is one of the few species of the genus Jcmira which 

 are known to inhabit deep-water. 



The single specimen is mounted in Canada balsam, and owing to its great transparency 

 is somewhat difficult to describe accurately; for the same reason I have not figured the 

 species. The head has a rounded anterior margin, and the eyes are completely absent ; 

 the first three segments of the thorax are of about equal length; the next two are very 

 much shorter, about one-half the length of the anterior segments ; the sixth segment has 

 an anteroposterior diameter about equal to that of either of the first segments, while the 

 seventh and last segment of the thorax is longer than any. The margins of the thoracic 

 segments are rounded and fringed with short stiff hairs. The abdominal shield is rather 

 longer than broad, and its margin is similarly furnished with hairs. 



The antennules have the form characteristic of the genus Janira, but I am unable 

 to give any details. 



In the antennas the third joint has a long scale attached to its outer side, which projects 

 beyond the short fourth joint ; the fifth joint is long and stout ; ' the distal joint of the 

 peduncle is longer but rather more slender ; the flagellum is of a very great length, much 

 longer than the peduncle ; the whole appendage is longer than the body of the animal. 



The mandibles are furnished with a palp. 



The thoracic limbs are all similar to one another. 



The uropoda are long, as long as the abdominal shield ; they consist of a short broad 

 basal piece with two long and narrow rami ; of these the inner are the stoutest as well as 

 the longest ; each has a tuft of longish hairs at its extremity. 



Station 175, off Kandavu, Fiji, August 12, 1874; hit, 19° 2' S., long. 177° 10' E.; 

 depth, 1350 fathoms ; Globigerina ooze; bottom temperature, 3G° F. 



Janira tristani, F. E. Beddard (PI. II. figs. 2-5). 



Janira tristani, F. E. Beddard, Proc. Zool. Soc. Lond., 1886, pt. i. p. 105. 



Two specimens of this species were dredged off Tristan da Cunha in 100 to 150 

 fathoms. 



I regard the species as belonging to the genus Janira with some hesitation as both 

 specimens are imperfect, certain appendages which would largely aid in identifying the 

 genu's being missing. 



The length is 5 mm. 



1 The only other species which ranges into water deeper than 100 fathoms is Janira laciniala, dredged by Sara in the 

 Northern Ocean from a depth of 400 fathoms (see G. O. Sars, Forhamll. Vidmtk. Selsk., 1872, p. 92). 



