322 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
outer setae. The inner margin is broadly curved and has a small 
tooth near the tip opposite the distal outer seta and the tip itself has 
two terminal setae. There is also an appendicular seta on the dorsal 
surface of each ramus a little beyond the center. 
The first antennae are short and stout and 5-segmented, each seg- 
ment rather setose; the second antennae are 4-segmented and tipped 
with a stout claw. The maxilliped is 3-segmented, with a short and 
stout terminal claw, and the legs show no distinctive specific charac- 
ters. Total length including caudal rami 5.50 mm. Width of meta- 
some 1.33 mm. 
_ Male—General form short and broad, less than three times as long 
as wide including the caudal rami. Metasome widest at the third 
segment and narrowed posteriorly, the segments diminishing in length 
backward. Urosome narrower than the metasome and, without the 
caudal rami, less than half as long and made up of five segments. 
The anal segment is less than half the width of the penultimate seg- 
ment and shows a pair of anal plates similar to those in the female, 
each with a dark spot in the center. Caudal rami also similar to 
those in the female but only three times as long as wide, with two 
terminal and two outer setae and a tooth near the tip of the inner 
margin. Antennae, mouth parts, and legs similar to those of the 
female. While the females are of a brownish color and opaque, the 
male, as is usual in this genus, is more or less transparent and is 
covered up and down the center of the body with circular black spots 
irregularly arranged and of different sizes. This spotting is fully as 
conspicuous and as deep a black as in nigromaculata,; the position of 
the posterior pair of spots is shown in figure 493. Total length, in- 
cluding caudal rami,6mm. Greatest width 2mm. 
Alloiype male—U.S.N.M. No. 74146; station 5578, latitude 5°14’38”’ 
N., longitude 119°57’57’" E., north of Tawi Tawi, Philippine Islands. 
Remarks.—There are two differences between these Albatross speci- 
mens and the single female described by Scott. The eye lenses are in 
contact on the middle of the forehead, and the outer margins of the 
caudal rami are armed with setae. 
SAPPHIRINA METALLINA Dana 
Sapphirina metallina DANA, Proc. Amer. Acad. Arts and Sci., vol. 2, p. 41, 1849; 
United States Exploring Expedition, 1888-42 (Wilkes), vol. 14, pt. 2, 
Crustacea, p. 1242, 1853; pl. 87, figs. 5 a-c, 1855. 
Stations 3681; 8782; 3799; 3878; 8901; 3932; 4009; 4190; 4655; 
4699; 4721; 5102; 5129; 5155; 5185; 5223; 5229; 5422; 5553; Gilbert 
Islands. Established by Dana upon specimens from these same 
Gilbert Islands. This species is so well distributed that it is present 
in all the plankton lists. 
