NORTH ATLANTIC SEA AND THE FAROE CHANNEL. 119 



14. Xanthocahinns atlanticus (nov. sp.). Differs from X. aijilis aiul 

 horealis in the characters of the anterior antennae : very thick basally, 

 tapered distally, and much shorter than the cephalothorax. The first 

 joint of the fifth feet in the ? broader than long, with the inner 

 margin armed with closely set spines, the second joint short, the third 

 joint twice as long as broad, with short strong spines marginally, and 

 distally with four broad-based long spines, the inner the longest, the 

 surfaces of all three segments covered with short spines. Size 2'50 mm 

 Taken on a sandy bottom, at 375 fathoms west of Valentia. Distin- 

 guished from X (((jilis and horealis by the very short anterior antennae, 

 the fifth feet, and other minor characters. The swimming feet have 

 the segments densely covered with short spines. (PI. IX., figs. 24, 

 25, 33.) 



15. Xanthocalamts cristatus {7ioi\ sp.). ? very large, o'O mm. ; head 

 triangular and with prominent crest ; anterior antenme extending to 

 the end of the f urea ; anterior foot-jaw with very strong curved hook 

 on the fifth lobe, endopodite of the same with seven short thick brush 

 processes and a long thin curved vermiform process ; posterior foot- 

 jaw with brush sensory process on first basal. Feet as in Xantliocalanus, 

 but fifth pair each of three joints, the first as broad as long, the second 

 longer than broad, the third two and a half times as long as broad, all 

 densely spinulose, with long and short spines intermixed on the surfaces, 

 the last segment with a row of long stout spines on the external surface, 

 and ending distally in two short, rather stout, spiny processes (not articu- 

 lating spines, as in other species), the innermost a little longer than 

 the outer, and a third similarly formed outer spiny process. (Tl. IX., 

 figs. 18, 19.) 



No other Xanthoccdanus has a crest. Sheaf-like sensory processes as 

 in Amcdlophora are absent ; the segmentation of the feet and of the 

 anterior antenna;, the spinulation of the feet, the separation of the 

 head from the first segment indicate it clearly to be a Xanthoccdanus. 

 Taken off the west of Ireland at a depth of 300 fathoms. 



16. Scolecithrif^ similis {nov. sp.). Much resembling S. minor, but 

 the head rounded and oval, the last thoracic segment rounded with 

 rounded Hap-like projections; fifth feet one-jointed, twice as long as 

 broad, with very short inner marginal spine inside the apex, and longer 

 spine arising from just below the middle of the inner margin, not as 

 long as the distance between its origin and the apex of the segment. 

 The different shape of the head and corners of the last thoracic segment, 

 and the fifth feet, at once distinguish it from *S'. minor. (PI. IX., fig. 5, 

 6.) Size 1-50 mm. Several examples have been taken iu the Faroe 

 Channel and the Atlantic. 



