268 THE SCHIZOPODA. 



somewhat shorter than the inner margin of the lobe from third joint and twice 

 as long as broad. — Second pair of thoracic legs with fifth joint considerably 

 longer than the sixth. 



Abdomen without doi'sal processes or teeth. Preanal spine simple in both 

 sexes. — Uropods slightly or scarcely overreaching the telson; the exopod 

 slightly longer than the endopod. — Telson has two longitudinal keels extremely 

 finely serrate along more than half of its length and with a very short and thin 

 seta at each saw-tooth. 



The copulatory organs (figs. 4c-4d) show some peculiarities. The spine- 

 shaped process (p^) is somewhat small, well curved. The terminal process 

 (p.-) has the basal portion verj^ much thickened and from the outer side of 

 this part the process projects forwards, ha\'ing the inner margin straight and 

 at some distance from the end suddenlj' bent somewhat inwards, while the 

 outer margin is convex and the terminal margin in the Pacific specimen 

 obliciuely and deeply emarginate'; the major part of the process has a flat 

 expansion on the outer side and at the end it is peculiarly shaped, being curved 

 somewhat backwards, as may be seen by a comparison of fig. 4c with fig. 4d. 

 The proximal process has its proximal part very thick and directed forwards 

 and outwards (fig. 4c, i)\); then it bentls abruptly and strongly inwards, is very 

 slender, very long, and at the middle cur\'ed in the opposite direction, while 

 the terminal, very thin part is curved semicircularlj'. The lateral process (p^.) 

 is rather slender, with the curved distal part short. The additional process 

 (p^.) as in the other species of the genus consisting of an oblong and feebly curved 

 basal part, from the entl of which j^rojects an extremely thin distal portion 

 directed outwards antl forming with the thick jiart an acute angle. The median 

 lobe long and moderately narrow; the auxiliary lobe somewhat short; the 

 setiferous long, somewhat narrow, with setae along the distal part of tlie 

 iimer margin and the major part of the outer margin. 



Length of the single adult male 21.5 mm., of a large female 21 mm. 



Remarks. — For comparison with the two following species the above 

 description may be useful. Caiman has given (in 19Q5) an excellent figure of 

 the animal; the only point with which I disagree is the position of the eye, 

 as I ne\'cr found the groo\'e divitling it into two so vertical areas, but at most 

 somewhat ol)li(iue and most frequently nearly horizontal. 



Di.stn'bulion. — N. boajjis goes very fa,r northwards in the Atlantic, as it 



' In :i male fiom the Moikicd (■(illoetion tlif terminal margin is wry oliliqur, badly defined from 

 the Dtlier margin and slightly incised. 



