KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 52. N:0 |5. 17 
Furca: Ramus rather narrow and, as will be seen from the drawings appended, 
of somewhat varying types, sometimes almost linear in form, sometimes more or 
less slightly S-shaped; along its posterior edge a dense series of short fine uniform 
hairs. The end-eclaws evenly or somewhat irregularly curved with short and fine 
ventral hairs; distal bristle about the third of the length of the distal claw or a 
trifle longer, naked: the proximal bristle, the situation of which varies a little, gene- 
rally as on fig. 13, distinetly weaker than the neighbouring claw and about a third 
shorter than it, ventrally with short hairs. 
Penis: As described by G. O. SARS. 
The lips and the rake-like organ agree closely with the type described by 
C. CrLaus, 1893, as common to the Cyprids. As to the chitinous stripes of the upper 
lip see the drawing. 
Female: Shell: Length 0,94—1,1 mm.; length : height about 1,66 to 1,74: 1. 
Length : breadth about 2,3 :1. As to the form the shell agrees closely with that of 
the male, sometimes it exhibits, however, — as will be seen from the proportion 
between the length and the height given above — some variation from the type shown 
in the drawing. The hepatic appendages of the intestine extend to the posterior 
extremities of the valves. 
First antenna: Agrees perfectly with that of the male, even the sensorial 
bristle of the end-joint having an equal development in both sexes. 
Second antenna: This leg, too, shows on the whole a very close agreement 
with that of the male, only some differences in certain bristles having to be taken 
into account. 'The natatory bristles, like all the sensorial ones — i. e. bristles 
often showing differences in the two sexes in this group of animals — are quite similar 
to those of the male. Second endopodit joint: the five bristles at the middle of 
the posterior edge are of the same type in both sexes, the three middle ones are, 
however, in the female distinetly longer relatively than in the male, the two ante- 
rior — corresponding to the »Männchenborsten» of the male — naked or almost naked. 
From the distal edge of this joint the same number of bristles originates as in the 
male; most of these bristles are, however, of quite a different type: two, both medial, 
the one originating just within the end-joint, the other a little in front of the former, 
are of the same type and relative length as the two powerful anterior claws of the 
male; one, antero-lateral, is also of this type and power but only of half the 
length; two, lateral, attached at about the middle height of the joint, the one a 
little proximally to the other, are relatively of the same length and type as the two 
bristles which have a corresponding situation in the male; the distal one is, however, 
relatively weaker and like the other quite naked; one, antero-lateral, is of the same 
type as the two last-mentioned but only about half as long as the proximal one of 
K. Sv. Vet. Akad. Handl. Band 52. N:o 15. 3 
