248 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
LABIDOCERA NERII (Kr¢yer) 
PLATE 16, FicuRE 194; PLATE 24, FicuRE 360 
Pontia nerii Kréyrr, Naturh. Tidsskr. Kjgbenhavn, ser. 2, vol. 2, p. 600, pl. 6, 
figs. 12-16, 1849. 
Stations 18; 15. Identified by Sars from station 18, off the coast 
of southern Argentina, and station 15, off northern Chile. Found in 
the Monaco and Carnegie plankton lists. In the fifth legs of the fe- 
male the exopod is six times as long as the endopod and is tipped 
with three acute spines. The chela of the right fifth leg of the male 
has two long processes at the proximal corner and the finger closes 
down between them. 
LABIDOCERA ORSINII Giesbrecht 
PLATE 24, FicurES 361-862 
Labidocera orsinti GiEsBRECHT, Atti Accad. Lincei, Rome, ser. 4, vol. 5, sem. 2, 
p. 27, 1889; Fauna und Flora des Golfes von Neapel, monogr. 19, pp. 446, 
460, pl. 25, fig. 85; pl. 41, figs. 17, 33, 1892. 
Station 5225; Sabtan Island Anchorage, Philippine Islands. Origi- 
nally established by Giesbrecht upon female specimens from the Red 
Sea, it does not appear in any of the plankton lists. All the specimens 
obtained at these two Albatross localities were also females; the male 
still remains unknown. In the fifth legs the distinctive characters 
are the bluntly rounded endopods notched at their tips and the small 
knobs at the distal corners of the second basipods outside of the exo- 
pods. In the lateral view of the urosome the first and second segments 
of the abdomen are about equal in length, while the anal segment 
is longer than the other two combined, but only half as high 
dorsoventrally. 
LABIDOCERA PAVO Giesbrecht 
PLATE 25, FIGURE 363 
Labidocera pavo GIESBRECHT, Atti Accad. Lincei, Rome, ser. 4, vol. 5, sem. 2, p. 27, 
1889 ; Fauna und Flora des Golfes von Neapel, monogr. 19, pp. 446, 460, pl. 25, 
fig. 34; pl. 41, figs. 18, 38, 1892. 
Stations 5105; 5225; Port Binanga, Luzén, Philippine Islands. 
Established by Giesbrecht upon female specimens from the Red Sea, 
it does not appear in any of the plankton lists. It was reported from 
14 Ceylon stations by Thompson and Scott (1903, p. 251), and adults 
and immature stages were described and figured by Sewell (1922, p. 
365). The species may be recognized at once by the dorsal aspect of 
the urosome as shown in figure 363. The genital segment has a lateral 
outgrowth on the right side and a ventrolateral process showing on 
the left side. The abdomen is 1-segmented, and the caudal rami are 
kidney-shaped and attached diagonally to the sides of the abdomen. 
