1885.] DURING THE VOYAGE OF H.M.S. ' CHALLENGER.' 921 



A remarkable peculiarity of this species is that the integument, 

 instead of being firm and calcified as in Crustaceans generally, is 

 delicate and transparent. The head is large and convex dorsally ; 

 the first segment of the thcrax is very short; the second and third 

 are subequal, and slightly longer than the first ; the fourtii segment 

 is as long as the second and third taken together. All these seg- 

 ments are concave dorsally ; they are furnished with short epimera. 

 The segments themselves occupy a very small region of the body 

 compared to other species ; the length of the four segments taken 

 together is only 5 millim., while that of the next three is 18 millim. 



The three posterior segments of the thorax are approximately of 

 equal size ; their shape is not unlike that of other species of the 

 genus. 



The abdominal segment is large, but it is so collapsed that it is 

 impossible to give an accurate description. It appears to resemble 

 very closely that of E. sarsii ; the posterior extremity is much 

 bent down, so that on a lateral view the abdominal segment is semi- 

 circular in outline, the anus being directed downwards and even a 

 trifle forwards. 



The body of this species is entirely devoid of any spines. 



All the thoracic a])pendages, as well as the antennae, have been 

 broken off short. 



The mandibles are stout and powerful, and appear to be without 

 a palp. 



Station 218, 1070 fathoms. 



7. EURYCOPE ABYSSICOLA, U. Sp. 



This species, like the last, is remarkable for the extreme delicacy 

 and transparency of the integument ; this character is almost more 

 conspicuous in E. abyssicola than in E. pellucida. 



The single specimen, which was dredged in the N. Atlantic, 

 measures 40 millim. It presents a good many resemblances to 

 E. jiellucida. 



The head is convex dorsally ; the first four segments of the thorax 

 are very short, and together measure no more than the fifth segment 

 alone ; they increase progressively in length. Of the three posterior 

 segments of the body the middle one appears to be rather the largest, 

 while the first and third are subequal. The abdominal segment is so 

 damaged, that it is impossible to give any idea of its size and shape. 



The mandibles have no palp. 



The thoracic appendages of the first and sixth pairs have been 

 preserved. The first pair appears to resemble the same appendages 

 of other species of Eurycope ; the sixth pair are modified into folia- 

 ceous swimmerets ; but in these appendages only of the antepenul- 

 timate the flattened and dilated joint has been preserved ; it is of 

 comparatively enormous size. 



Station 68, 2175 fathoms. 



8. Etjrycope spinosa, n. sp. 



Another very remarkable form is the present species, which is 



