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No. 1591. SCHIZ ee FROM ALASKA—ORTMANN. 7 
True legs. ‘(Plate ih fis, 8) “slender, sparsely iow)  Eropoditie 
three-jointed ; ducilopodite short, with a long curved terminal spine. 
Abdomen long and slender. Nodiorntoal appendages greatly dif- 
ferentiated, but all biramous. First pair of pleopods (Plate I, 
fig. 9) with outer branch well developed and multiarticulate; inner 
branch short, about half as long as outer, uniarticulate, with a blunt 
process near base. Second and third pair (Plate I, fig. 10) with 
both branches nearly alike and multiarticulate, the inner one hardly 
longer than the outer, bearing a blunt process at the base. Mourth 
pair of pleopods (Plate I, fig. 11) with outer branches similar to 
that of the first, second, and third pair, but inner branch (bearing a 
blunt process at base) much elongated, about twice as long as outer. 
This is due chiefly to the lengthening of the three distal joints, of 
which the first two increase only slightly, while the last one is consid- 
erably longer than these two together. All three terminal joints are 
destitute of sete, but the last one bears at its end a long and stout 
spine. The fifth pair of pleopods is similar to the second and third. 
_ In young males the pleopods are not so strongly developed; in the 
second, third, and fifth the inner branch is distinctly longer than the 
outer (two or three joints projecting beyond the tip of the outer), 
and the imner branch of the fourth is not so greatly elongated, 
although the remarkable increase in length of the distal joints is 
distinctly indicated. 
Uropods (Plate I, fig. 13) well developed, with well developed 
otolithe; both branches longer than the telson, but the outer one much 
longer than the inner. Margins setose, inner margin of the inner 
branch with a row of seven spines near the otolithe, of which the 
distal one is remote from the rest. 
Telson (Plate I, fig. 18) elongate-triangular; margins straight, 
with 16-18 spines along the greater distal part of the margins; the 
spines increase slowly toward the end, the last one on each side being 
twice as long as the one preceding it. Between the two long spines 
forming the outer corners of the telson the apex is truncated and car- 
ries 4 spines, the two outer ones short and stout, the inner ones very 
long and setiform. 
The largest female represented in the collection (Station No. 4264) 
measures 40 mm. The conical process of the antennule is lacking 
in the female. The marsupiwm consists of three pairs of leaflets, 
of which the first pair is quite small. The pleopods (Plate I, 
fig. 12) are all uniform, being simple and of the usual shape in the 
family, increasing slightly in length from the first to the last. 
