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somewhat narrower than that of the female. Tlie medial bristles are similar to those of the
female; those on the anterior part of the shell are, perhaps, however, somewhat fewer and
longer than those of the female.
First antenna (fig. 7): — This has seven joints. The proportion between the
joints is about as follows:
13– II
A 25’ 1L
35 #
22 ’
II
I7.
4 ’
IV å;
V
VI t; VII
3
16*
Of the five anterior bristles on the third joint nos. 2 and 5 especially are very
much shortened. Of these bristles no. 1 has rather numerous long, stiff secondary bristles
ventrally, no. 3 is armed with a few similar bristles, bristle no. 2 has moderately long, fine
secondary bristles, the others have short liairs. The longer of the two posterior distal bristles
on the fourth joint is about as long as the total lengtli of the three following joints. The sensorial
bristle of the fifth joint is of quite the same type as in the female, i. e. it has only six sensorial
filaments; its stem is about as long as the posterior side of the second joint. The a-claw is finely
pectinated, as in the female. The b-bristle is about as long as the anterior side of the second
and third joints and, like that of the female, it has five sensorial filaments. The c- and f-bristles
are subequal, about a third longer than the shell (their length was 2,3—2,4 mm.). In one
specimen twenty sensorial filaments were observed on the c-bristle of each antenna, eighteen
on the f-bristle (both these bristles were defective in the other specimen). The g-bristle is
somewhat longer than the wliole antenna; it has eight sensorial filaments.
Second antenna: — The exopodite is comparatively slightly lengthened.
The relation between the joints is shown by the following numbers:
<$ (length of shell, 1,6 mm.) = I : II : (III — IX) = 40 : 11 : 22.
For the sake of comparison I give here the corresponding figures for the female, expressed
on the same scale:
$ (length of shell. 1,7 mm.) — I : II : (III — IX) = 31 : 6 : 21.
The second joint is about as long as the following two or three joints together; the third
to the ninth joints are of about the same length, as is the case in the female. All the joints,
thus even the end joint, are without basal spines. Endopodite (fig. 9): The three bristles
on the second joint are well pointed and decrease uniformly in length; the longest is about as
long as the width of this joint at the place where the bristle is fixed, the shortest one is about
half as long as the longest one or somewhat more. The third joint is rather broad proximally,
lancet-like, with rather broad, thin side borders. Its point has six or seven powerful, chitinized
cross-ridges on the inside. Its proximal bristle is somewhat shorter than the joint,
M audible: — Protopo dite: Basale: The backward pointing process is as
strongly developed as in the female; it lias no perceptible réduction of the bristles. At
about the middle of the dorsal side of this joint there is a single bristle of about the same
length as the dorsal side of the joint. Endopodite: First joint: The shortest of the three
ventral bristles is furnished at the middle with fine secondary bristles situated close together
and ail round the bristle; these are about as long as the long secondary bristles on the two other
bristles; distally it has short hairs. On the two other bristles the short proximal secondary
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