COPEPODS GATHERED BY ALBATROSS—WILSON 165 
Remarks.—This species is considerably larger than patersonii and 
lacks wholly the distinctive coloration of the latter. In both sexes 
the genital segment has a process on each side, the left one in the female 
looking like a hand with four spiny fingers, whence the specific name. 
In the female also the urosome is 4-segmented and quite asymmetrical, 
and in the male there is a row of knobs on the dorsal midline, one at the 
posterior margin of each segment, and a large ventral eye at the 
base of the rostrum. 
ANOMALOCERA PATERSONII Templeton 
Anomalocera patersonii TEMPLETON, Trans. Ent. Soc. London, vol. 2, p. 35, pl. 
5, 1837. 
Station 5234. This species appears in the Monaco, Siboga, and Car- 
negie planktons. It is a widely distributed species and is often abun- 
dant in a favorable locality. 
Genus ARIETELLUS Giesbrecht, 1892 
ARIETELLUS ACULEATUS (T. Scott) 
PLATE 20, FIGURE 280 
Rhincalanus aculeatus T. Scott, Trans. Linn. Soc. London, ser. 2, Zool., vol. 6, 
pt. 1, p. 31, pl. 2, figs. 11-24, 1894. 
Stations 5185; 5231. Founded upon a single immature male from 
the Gulf of Guinea and placed in the genus Rhincalanus by T. Scott 
and afterward made a synonym of Arietellus setosus by Giesbrecht 
(1898, p. 124). The Stboga plankton yielded a single mature female, 
which A. Scott rightly judged to be specifically distinct from setosus. 
Upon this female and the immature male A. Scott reestablished his 
father’s species. Farran afterward found a mature male in a surface 
haul from off New Zealand, which assured the validity of the species. 
A single male was found at each of the above Albatross stations. 
That they were both in the same immature stage as the original one 
from the Gulf of Guinea is seen in the fact that their fifth legs (fig. 
280) are an exact replica of Scott’s original figure. 
ARIETELLUS ARMATUS Wolfenden 
PLATE 4, FIGURES 23-26 
Arietellus armatus WOLFENDEN, Deutsche Siidpolar-Exped., 1901-1903, vol. 12, 
Zool., vol. 4, fase. 4, p. 330, fig. 67, pl. 36, fig. 4, 1911. 
Stations 6; 7; 27; 3878; 4689; 4705; 4722; 4730; 4734; 5319; 5451. 
Hight specimens, including both sexes, obtained from the first two 
_ stations east of Trinidad and north of French Guiana, were identified 
by Sars as a new species. Single specimens were obtained from the 
other stations. Wolfenden, in his report on the German South Polar 
