COPEPODS GATHERED BY ALBATROSS—WILSON 259 
the general form of the fifth legs of the male. On the other hand, 
the fifth legs of the female are very similar to Scottocalanus. 
MACANDREWELLA CHELIPES (Giesbrecht) 
PLATE 18, Figures 137-147 
Scolecithrir chelipes GirsBRECHT, Zool. Jahrb., Abt. Syst., vol. 9, p. 321, pl. 5, figs. 
16-22, 1896. 
Stations 4732; Fiji Islands; Ellice Islands. Established by Gies- 
brecht upon a single male taken in the Red Sea and placed in the genus 
Scolecithrix. Scott made a new genus Macandrewella in the Siboga 
plankton for the reception of a new species, joanae, of which he 
described both sexes. The male was so similar to the one portrayed 
by Giesbrecht that he transferred the latter to his new genus. AI- 
though the species has been reported since its original discovery, the 
female has never been mentioned. Sars, however, found both sexes 
in this Albatross plankton and made detailed drawings of the female 
appendages together with those of the male. They are here repro- 
duced and made the basis of a full description. 
Female.—Metasome elliptical, two and a half times as long as wide; 
head fused with the first segment, fourth and fifth segments com- 
pletely separated, the latter produced backward and armed with a 
small curved spine which reaches the center of the genital segment. 
Rostrum a small flattened lamina bisected for half its length, the 
branches tipped with soft filaments as long as the lamina. Urosome 
4-segmented, genital segment a trifle wider than long and with nearly 
straight sides; abdomen a little narrower, its three segments diminish- 
ing in length posteriorly. Caudal rami wider than long, each with 
four setae, the second inner one on each ramus lengthened. 
First antennae slender and reaching the abdomen; exopod of the 
second antenna almost twice as long as the endopod, the end segment 
one-half longer than the second segment. Chewing blade of the man- 
dible abruptly narrowed distally, with two squarely truncated teeth, 
palp with short rami. Second maxilla with five well-developed inner 
lobes and two kinds of sensory organs on the end segments. Basal 
segment of the maxilliped twice the width of the second segment, all 
the setae short and weak. Basal segment of the first exopod without 
an inner seta; second and third endopods and third exopod with small 
spines on their surfaces; fifth legs entirely lacking. Total length 
3.50 mm. Metasome 3 mm. long, 1.30 mm. wide. 
Male.——Smaller than the female but with the same general body 
form; the first antennae reach beyond the center of the abdomen; the 
exopod of the second antenna is only one-fourth longer than the endo- 
pod. The mouth parts and the first four pairs of legs are like those 
843804—50——_9 
