COPEPODS GATHERED BY ALBATROSS—WILSON 245 
in any of the plankton lists. However, Dr. R. B. S. Sewell (1912, 
pp. 839-344) found development stages of both sexes in the Bay of 
Bengal, which he described and figured. The right fifth leg of an 
Albatross male is shown in figure 364. This corresponds well with 
the one shown on Sewell’s plate 18, figure 8, “Stage 1.” [Dimorph. 1], 
later called “forma major” (Sewell 1932, p. 361). The fifth legs of 
the females are also like the figure given by Giesbrecht of his type 
female. 
LABIDOCERA INSOLITA, new species 
PuLate 24, FicurEs 346-350 
Caldera Bay anchorage, west coast of Mindanao, Philippine Islands. 
One hundred specimens of a new Labidocera species, including both 
sexes, were taken at this anchorage in a net set in the tide current at 
the gangway of the steamer and a large catch was made. 
Female.—Metasome elliptical, nearly three times as long as wide, 
considerably narrowed anteriorly but not so much posteriorly. Head 
separated from the first segment, without lateral hooks and more than 
half the length of the metasome. Fifth segment very short and 
rounded at the posterior corners, with small acute spines, both seg- 
ment and spines perfectly symmetrical. Urosome also perfectly sym- 
metrical and 3-segmented. Genital segment as long as the abdomen 
and caudal rami combined, its sides a little convex. First abdominal 
segment twice as long as the anal segment, the latter incised at the 
center of its posterior margin. Caudal rami nearly as long as the 
entire abdomen and curved like parenthesis marks. 
First antennae reaching the posterior end of the genital segment; 
exopod of second antenna a little shorter than the endopod, with six 
setae. The bilobed tip of the endopod is armed with 12 setae, 6 on 
each of the lobes. The fifth legs are long, slender, and curved; the 
exopod is twice as long as the endopod and also twice the length of 
the basipod segment to which it is attached. It is tipped with three 
spines, the middle one much longer than the other two, but has no 
spines on the outer margin. The endopod is simple and unarmed, 
but the tip is contracted into a slender, fingerlike process. The whole 
endopod is almost as long as the second basipod. ‘Total length 2.54 
to3mm. Greatest width 0.70 mm. 
Male—Metasome similar to that of the female but not narrowed so 
much anteriorly, making the head a little wider. Fifth segment with 
rounded corners and small acute spines like those of the female, the 
whole symmetrical. Urosome 5-segmented, segments diminishing con- 
siderably in length backward but only a trifle in width; like the female, 
it showsno asymmetry. Caudal rami as long as the last two abdominal 
