77 
al cu kort. men temmelig tyk Stamme, til hvis Ernie er 
hestet 2 ulige udviklede Grene. Den ydre at disse er 
u >eget liden, smalt konisk og kun bestaaende at et enkelt 
^ (, d. livorimod den indre er betydelig starve og sammensat 
■d 2 tydeligt begrsendsede Led, bvoraf det sidste paa Spidsen 
ban-er Here saerdeles lange og tynde, divergerende Burster. 
Den fuldt ' udviklede Ban (Fig. 11 og 12) er noget 
aiindre end Hunnen og i Here Henseender forskjellig fra 
samme. 
Kropsformen er forlioldsvis noget spinklere og Legemet 
l Jaa Midten ligesom indsnorot. idet de 3 bagerste Forkrops- 
s egmenter, er kjendeligt smalere end saavel de loregaaende 
S01u Bagki'opssegmenterne. Disse sidste er betydelig kral- 
tigero udviklede end hos Hunnen, oventil stmrkt hvselvede 
mangier ganske den ventrale Kjol med sine tornlormige 
f 1 ortsatser. Sidste Segment er dog forlioldsvis mindre stserkt 
epsvnlinet og gaar bagtil ud i en temmelig lang konisk 
Spids. 
1 ste Par Folere (se Fig. 18) er af et fra samme bos 
Hunnen meget forskjelligt TJdseende. De er betydelig stprre 
IJ k sannnensatte af 7 tydeligt begramdsede Led, bvoraf de 
lurste maa benregnes til Skaftet, de 5 sidste til Svpben. 
^ Skaftets 2 Led er det lste omtrent dobbelt saa stort 
S01n det 2det; begge er af bred cvlindrisk Form og fyldte 
med staerke Muskelknipper, der tjener til at bevsege Sveben. 
Denne sidste er noget lsengere end Skaftet og jevut alsmal- 
uende mod Enden. Dens 3 l'orste Led er meget korte og 
bterer ligesom det folgeude i den ydre Kant et tset Knippe 
blare, vifteformigt udbredte Sandsebprster ; sidste Led ei 
Uo » e t lasngere end det foregaaende og ved Spidsen forsynet 
uied eu Del simple Borster. 
2det Par Folere viser derimod ingen bemmrkelig b or- 
s kiel fra samme bos Hunnen. 
Munddelene er, som bos de fieste Tanaidebanner, ufnld- 
sLendigt udviklede, og alene Kjsevefoddernes Palpe af uor- 
>ualt TJdseende. 
1 Foddernes Bygning er ingen vmsentlig Afvigelse at 
uotere, og Saxfpdderne, der bos enkelte til dcnne I amilie 
koi ende Former viser en saa paafaldende Forskjel hos begge 
Hjcm, er her fuldkomrnen af ens TJdseende som hos Hunnen 
(se Fig. 12 0 g 14). 
Derimod viser Bagkroppens Vedhamg mere udprmgede 
Atvigolser. 
B uglemm er ne (se Fig. 12 og 15) er saaledes bei i 
■Modssetning til deres rudimentasre Beskatfenhed bos Hunnen, 
udviklede til kraftige Svpmmeredskaber og bar i Overens- 
stemmelse hermed Endepladerne besat med overordentlig 
Huge og standee Fjaerbprster. 
Halevedbsengene (Fig. 16) er betydelig stserkere toi- 
kengede end bos Hunnen. og Gfrenene bar bver 1 Led 
flere end hos denne, idet den ydre er 2-leddet, den indre 
^-leddet. 
Farven saavel bos Han som Hun er ensiormig livid 
i&esom bos de tleste til denne Tribus her en de bormei. 
are seen to project from the posterior margin of the seg- 
ment. They consist of a short, but somewhat thick stem, 
to the extremity of which are attached 2 unequally devel- 
oped branches. The outer of these is very small, conically 
slender, and consists of but one joint, whereas the inner 
branch is considerably larger, and composed of 2 distinctly 
defined joints, the latter of which bears, at the point several 
exceedingly long and slender, diverging bristles. 
The Judy developed Male (figs. 11, 12) is somewhat 
smaller than the female, from which, in several respects, it 
is found to differ. 
The body is relatively a trifie more slender in form, 
and in the middle, as it were, constricted, the 3 posterior 
pedigerous segments being perceptibly narrower than both 
the anterior and the abdominal segments. The latter are 
much more powerfully developed than in the iemale, ex- 
ceedingly arcuate above, as also without a trace ot the 
ventral keel and its spdniform projections. The last segment 
is. however, comparatively less tumid, and projects posteriorly 
i into a long, conical point. 
The 1st pair of antennae (see fig. 18) have a widely 
different apparance from those in the female. They are 
considerably larger, and composed of 7 distinctly defined 
joints, of which the 2 first must he regarded as belonging 
to the peduncle, the 5 last to the flagellum. The latter 
somewhat exceeds the peduncle in length, and tapers grad- 
ually toward the end. Its 3 first joints are very short, 
and bear, as does also the succeeding, on the outer margin, 
a dense fascicle of pellucid, flabelliform-expanded sensory 
bristles; the last joint is somewhat longer than the preceding, 
and furnished at the point with a number of simple bristles. 
The 2nd pair of antennae exhibit on the other hand 
no conspicuous difference from those in the female. 
The oral appendages are, as in most Tanaid males, 
imperfectly developed, only the palp of the maxillipeds 
being of normal appearance. 
In the structure of the legs, there is no essential 
deviation to record; and the chelipeds, which in several 
forms of this family exhibit so striking a difference in the 
two sexes, have precisely the same appearance as in the 
female (see figs. 12, 14). 
( )n the other hand, the abdominal appendages exhibit 
more salient deviations. 
Thus, the ventral limbs (see figs. 1 2, 1 5), in direct op- 
position to their rudimentary character in the female, are 
developed as powerful natatory organs, and have, in agree- 
ment herewith, the terminal plates beset with remarkably 
long and stiff, plumose bristles. 
The caudal appendages (fig. 16) are much more elon- 
gate than in the female, and the branches have each 1 
Joint more, the outer branch being two-jointed and the inner 
three-jointed. 
Colour, alike in male and female, a uniform white, 
as with most of the forms belonging to this tribe. 
