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 dorsal 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. 4e-4d) show some peculiarities. The spine- 
shaped process (p'.) is somewhat small, well curved. The terminal process 
(p.”) has the basal portion very much thickened and from the outer side of 
this part the process projects forwards, having the inner margin straight and 
at some distance from the end suddenly bent somewhat inwards, while the 
outer margin is convex and the terminal margin in the Pacific specimen 
obliquely 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, p*.); then it bends abruptly and strongly inwards, is very 
slender, very long, and at the middle curved in the opposite direction, while 
the terminal, very thin part is curved semicircularly. 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 end of which projects an extremely thin distal portion 
directed outwards and forming with the thick part 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 the 
inner 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. Calman has given (in 1905) an excellent figure of 
the animal; the only point with which I disagree is the position of the eye, 
as I never found the groove dividing it into two so vertical areas, but at most 
somewhat oblique and most frequently nearly horizontal. 
Distribution.— N. boopis goes very far northwards in the Atlantic, as it 
‘In a male from the Monaco collection the terminal margin is very oblique, badly defined from 
the other margin and slightly incised. 
