CRUSTACEA MAI,ACOSTRACA. IV. 35 



joint, while several teeth are found in P. armata; the conical process on the inner margin of the carpus of 

 second legs is found in both sexes, but does not exist in P. armala or P. macronyx. 



Occurrence. Not taken by the "Ingolf" but by the "Trior" in May 1904 at a single place. 



South-West of the Faeroes: Lat. 6i Q i5'N., Long. 9°35'W., 463 — 515 fath. ; 1 male and 1 female. 



30. Procampylaspis macronyx n. sp. 



(PI. II, figs. 8 a— 8 g.) 



Adult Male. Carapace from above nearly as on P. bituberculata, excepting that no vestige of any 

 dorsal spine or protuberances is found. Seen from the side, the carapace is not so low as in the preceding 

 species, as the dorsal line is somewhat convex. Pseudorostrum is, seen from the side (fig. 8 a), peculiarly 

 shaped, as its upper margin is considerably convex, the anterior margin concave and somewhat oblique, 

 because the upper part of pseudorostrum is produced considerably forwards. Seen from above no ocular 

 lobe could be observed between the lamellae of pseudorostrum, and this lobe seems to be wanting. The two 

 anterior free segments each with two submedian teeth, but these are smaller and scarcely originating from 

 a lamella as in P. bituberculata ; the segments otherwise nearly as in that species, but the number of teeth 

 and granules is somewhat higher. The abdominal segments with some or a few teeth on the sides and very 

 finely granulated above; first segment or besides the second with very few dorsal teeth. 



Second pair of maxillipeds (figs. 8 b and 8 c) with the terminal joint most peculiarly developed. 

 This joint has the same number of teeth and processes as in P. armata and P. bituberculata, but they differ 

 exceedingly as to shape and size ; the proximal tooth is triangular, of moderate size and much smaller than 

 in the forms named ; second tooth is rudimentary ; the proximal process is more slender than in the two other 

 species (in the mutilated "Ingolf" specimen this process is longer than in the type); second process is thin 

 and close to the terminal process, which is somewhat curved and exceedingly elongated, nearly three times 

 as long as the distance from its base to the origin of the joint. Third pair of maxillipeds (fig. 8 d) nearly as 

 in P. bituberculata ; there is no tooth on the outer side of the carpus, but the tubular process (t) on the merus 

 is present. First pair of legs (fig. 8 e) in the main as in the preceding form, but the carpus is distinctly shorter 

 than the merus. Second pair of legs (fig. 8 f) with the merus thick and not half as long as the somewhat slender 

 carpus, which is only a little shorter than the dactylus and without any process at the end of the inner margin. 

 — Uropods (fig. 8 g) considerably longer than in the male P. bituberculata ; the peduncle is very long, almost 

 as long as the three posterior abdominal segments together and more than two and a half times as long as the 

 endopod, on the inner margin with about 15 pubescent setae increasing much in length towards the end; 

 the endopod which is a good deal longer than the exopod, has 5 or 6 spines on the inner margin and a very 

 long apical spine. 



Length of the type 6 mm., of the "Ingolf" specimen 7.5 mm. 



Remarks. The male P. macronyx is easily separated from all other species hitherto known by the 

 extremely elongated terminal process on the dactylus of second maxillipeds, and as the armature of the 

 dactylus in other forms does not show sexual difference, the elongated process is in all probability also found 



5* 



