518 
The Philippine Journal of Science 
1920 
The second maxilla has the two lobes of about equal size, the 
outer with apical setse only, the inner bearing an oblique row 
of long setse near the inner margin in addition to those along 
the margin itself which merge into the usual apical setse. 
The maxillipeds have the inner lobe reaching about halfway 
along the outer, its truncate extremity with three stout setules 
and many smaller setules and hairs. The outer lobe is short, 
not reaching so far as the end of the carpus, its inner margin 
bearing stout setules, none of which are developed into spine 
teeth. The propod is much narrowed at the base, the dactyl 
is long and slender, nearly as long as the propod. In addition 
to the ordinary long setse numerous fine short setules are present 
on the dactyl and on the distal portion of the propod. 
The first gnathopod has the side plate produced a little an- 
teriorly, the angle being rounded, the basal joint is broad with 
tufts of setse on the posterior margin. .The ischium is produced 
on the inner side into a rounded lobe, the whole of which is 
covered by minute setse. Probably this joint meets the corre- 
sponding one on the other side when the limbs are being used 
and forms a grasping or triturating organ accessory to the ap- 
pendages of the mouth. The carpus is considerably longer than 
the propod, its inner surface being thickly covered with tufts 
of long setse as shown in Plate 1, fig. 1 ; the propod has the palm 
transverse and slightly convex. 
The second gnathopod is considerably larger than the first, 
and differs to a rather marked degree in the shape of the carpus 
and propod; the carpus is triangular, with the tufts of setse on 
its posterior margin compressed closely together; the propod is 
much longer than the carpus, oval, narrowing distally, the palm 
is slightly sinuous or nearly straight and much longer than the 
remaining portion of the posterior margin; the finger is strong 
and somewhat broad toward the base, but in the specimens 
examined does not show the bulging on the inner margin that 
is found in N. chilkensis. 
The first and second perseopods are subequal and similar in 
structure. The basal joint has the anterior margin produced 
and strongly convex so that the whole joint forms an oval, the 
greatest breadth being rather more than half the length; the 
posterior margin is somewhat serrate with long hairs arising 
from the shallow serrations ; the merus, carpus, and propod are 
of about the same length and bear only a few setules, two on 
the posterior margin of the propod being stouter than the others ; 
the finger is rather short, acutely pointed. 
