io8 



Stat. 128 (HENSEN vertical net 700 metres to surface), 3 specimens. — Stat. [41 (HENSEN 

 vertical net 1500 metres to surface), 9 specimens. — Stat. 148 (HENSEN vertical net 1000 

 metres to surface), 8 specimens. — Stat. 184, 6 specimens. — Stat. 185 (HENSEN vertical 

 net 1536 metres to surface), 4 specimens. — Stat. 230 (HENSEN vertical net 2000 metres 

 to surface), 8 specimens. — Stat. 243 (HENSEN vertical net 1000 metres to surface), 3 spe- 

 cimens. - - Stat. 276 (HENSEN vertical net 750 metres to surface), 6 specimens. 



This species is named in compliment to Mr. G. P. Farran, B.A., whose work amongst 

 the Copepoda of the deep water of the Atlantic slope off the West of Ireland, has considerably 

 extended the knowledge of the deep sea forms in the North Atlantic. 



4. Scottocalamts sctosits, nov. sp. Plate XXIV, figs. 10 — 18. 



Female — length 3,3 mm. 



Viewed from above, the body appears ovate and moderately robust. The last thoracic 

 segment is produced somewhat abruptly into a lamelliform extension having a pointed apex. 

 Seen from the side, the crest is high and distinctly angular at the apex. The last thoracic 

 segment terminates in a short curved point. The distal portion of the ventral margin of the 

 segment is sinuate in outline. The rostral points are stout and their length is about equal to 

 the depth of the excavation. 



The combined length of the abdomen and furca is contained nearly four times in the 

 total length of the cephalothoi-ax, from the apex of the crest to the base of the genital segment. 

 The genital segment is slightly longer than the combined length of the next three segments. 

 The ventral margin of the segment is tumicl and broadly rounded. The second segment is as 

 long as the combined length of the next two segments. The third segment is equal to two- 

 thirds of the length of the second segment. The furcal joints are distinctly longer than broad, 

 and are equal to the length of the second abdominal segment. The middle setae on the right 

 furcal joint, is considerably longer than the corresponding setae on the left furcal joint. 



The antennules are twenty-four-jointed and extend to about the base of the furca. 



The antennae, mandibles, maxillae and maxillipedes are similar to those of Scottocalanus 

 securifrons. 



The four pairs of swimming feet are also similar to those of that species. 



The inner margin of the free joint of the fifth pair of feet is slightly concave, and the 

 apex of the joint is considerably dilated. The long subapical spine is three and a half times 

 the length of the joint, and its apex is distinctly bifurcate. The apical spine is very small, and 

 is equal to about one-fifteenth of the length of the long spine. 



Male unknown. 



This species is readily distinguished from the other members of the genus, by the somewhat 

 abrupt prolongations of the last thoracic segment, by the bifurcate apex of the subapical spine 

 on the fifth pair of feet, and by the long setae on the right furcal joint. 



Occurrence. — Thirty-six specimens were obtained from the plankton collected at 

 the following stations. 



Stat. 118 (HENSEN vertical net 900 metres to surface), 2 specimens. — Stat. 141 (HENSEN 

 vertical net 1500 metres to surface), 6 specimens. — Stat. 145, 4 specimens. — Stat. 148 



10S 



