EOTINOSOMA. ie 
4. Horinosoma ATLANTIOUM (Brady and Fobertson). PI. 
XXXVIII, figs. 11—19. 
Microsetella atlantica, B.& R. Ann. and Mag. Nat. Hist., ser. iv, 
vol. xii, p. 130; pl. ix, figs. 11—16 (1873). 
Body ¢@gth of an inch in length (fig. 11), excessively 
slender, almost linear and much attenuated both 
behind and in front: tail-segments (fig. 19) very short 
and divergent. First cephalothoracic segment curvate, 
much attenuated in front, and equal in length to the 
five following segments. Anterior antenne (fig. 12) 
slender, 6-jointed, sparingly setose; posterior large, 
d-jointed, the first joint bearing a long 2- (or 3- ?) 
jointed secondary branch (fig. 13). First foot-jaw 
2-jointed, short and stout, provided with several apical 
sete; second foot-jaw (fig. 16) 3-jointed, with two 
or three curved claw-like setz at the apex. First four 
pairs of feet nearly alike; long and slender; branches 
of nearly equal size (fig. 17). Fifth pair (fig. 18) 
2-jointed ; internal portion of the basal joint produced 
nearly as far as the apex of the second joint, and bear- 
ing three apical sete, one of which is very long; second 
joint smaller, and bearing two long setz. The caudal 
segments have two principal sete (fig. 19), the inner- 
most of which is very short, the other as long as the 
entire body of the animal. Colour yellowish. 
Taken in the surface-net by Mr. H. C. Davison in 
the open sea as follows :—hLat. 53° 24° N., long. 15° 
pW. ; lat. 03° lo N.; long. 11° 517W.; lat. 51° 29’ 
