COPEPODS GATHERED BY ALBATROSS—WILSON 263 
Stations 2859; 3799; 4684; 4687; 4759; 4760; 5185; 5437. Again 
identified by Sars at 4 of these Albatross stations and 4 Monaco sta- 
tions, found also in the Siboga and Carnegie planktons. 
Genus MESORHABDUS Sars, 1905 
MESORHABDUS ANGUSTUS, Sars 
Mesorhabdus angustus Sars, Bull. Inst. Océanogr. Monaco, No. 101, p. 19, 1907; 
Rés. camp. sci. Albert de Monaco, No. 69, p. 236, pl. 66, figs. 14-20, 1925. 
Stations 4800; 5185. A single female was found at station 4800 in 
the Sea of Okhotsk. The species also appeared in the Albatross 
Philippine plankton collections at station 5185, between Panay and 
Negros. It was first reported from the Pacific area by Sewell (1932, 
p. 308). The maleis still unknown. 
Genus METRIDIA Boeck, 1865 
METRIDIA ATRA Esterly 
PLATE 25, F1GuRES 377, 378 
Metridia atra Esterty, Univ. California Publ. Zool., vol. 3, No. 5, p. 70, pl. 9, 
figs. 15, 16; pl. 11, figs. 39, 40; pl. 18, fig. 78; pl. 14, fig. 95, 1906. 
Station 5287. Originally established by Esterly upon specimens of 
both sexes taken in plankton hauls off the coast of southern California 
and not found in any of the plankton lists. Esterly obtained three 
males and a female, but most of the characteristics he mentions are 
from the males. To supplement these a figure is here given of the fifth 
legs of the female (U.S. N. M. No. 74124), which are 4-segmented, with 
three setae on the end segment, the longest one without plumes. In 
the endopod of the second legs also the spinal armature of the basal 
segment is peculiar. Although these Albatross specimens have been in 
preservative for 30 years, they still show plainly the black pigment 
over the entire surface of the metasome which was cited by Esterly as 
a prominent specific character. [Sewell (1932, p. 270) has given a 
description of the development stages of Gaussia princeps which leads 
him to conclude that the form reported by other authors as Metridia 
atra is actually stage V of G. princeps. Figure 378 as here drawn by 
Dr. Wilson corresponds closely to figure 93e of Sewell. Dr. Wilson’s 
statement above that the fifth legs of the female are 4-segmented should 
be construed as including what other authors consider as the basal 
segment. This is the system he used in referring to the segments 
of uniramose legs in the Woods Hole report.—M. 8. W. ] 
METRIDIA BOECKI! Giesbrecht 
Metridia boeckii GiesBRECHT, Atti Accad. Lincei, Rome, ser. 4, vol. 5, sem. 2, p. 24, 
1888 ; Fauna und Flora des Golfes von Neapel, monogr. 19, pp. 340, 346, pl. 32, 
fig. 8; pl. 33, figs. 8, 19, 31, 37, 1892. 
