76 
cerede og sterkere sammentrengte, og at ogsaa Epi-’| considerably reduced and more compressed, and that 
poditen har aftaget steerkt i Storrelse. Derimod er 
Exopoditen endnu forholdsvis af ikke ubetydelig 
Storrelse og noget afvigende i Form, med kun et be- 
greendset Antal af Randborster, hvoraf en udmerker 
sig ved betydelig Lengde. 
En Fod af sidste Par er fremstillet Fig. 21 
ved samme Forstorrelse som Fig. 19, og Fig. 22 
meget sterkere forstorret. Uagtet sin ringe Stor- 
relse, har Foden, som det vil sees, alle sine Dele i 
Behold, skjondt i hoieste Grad reducerede. 
Haletraadene (se Tab. XI, Fig. 1—3, Tab. XIU, 
Fig. 1, 2), der nermest maa opfattes som et Slags 
Lemmer, og aabenbart svarer til Halegrenene eller 
Furea hos Nebalia og hos Branchipodiderne, er af 
meget betydelig Lengde, adskilligt mere end halvt 
saa lange som hele Legemet, og synes til en vis 
Grad at vere bevegelige, da de snart er sterkt 
divergerende, snart mere lige bagudrettede. De ud- 
springer til hver Side af Halepladen, fra Enden af 
sidste Halesegment, og afsmalnes gradvis mod Enden, 
der gaar ud i en fin Spids. Af Consistens er de 
seerdeles elastiske, saa at de lader sig boie i alle 
Retninger, men nogen egentlig Leddeling synes ikke 
at vere tilstede. Derimod er de forsynede med tal- 
rige, noget skraatgaaende Tverrader af fine Pigge, 
som i den indre Kant antager Characteren af fine 
Borster (se Tab. XII, Fig. 23—24). 
Hannen (Tab. XI, Fig. 6, 6 a) er betydelig min- 
dre end Hunnen, idet den. kun opnaar en Leengde 
af 13 mm, og ligner ganske og aldeles unge Hunner 
af samme Storrelse, uden at der er nogen ioinefal- 
dende secundeere Kjonscharacterer at opdage. Det 
er derfor ikke saa let at kjende begge Kjon ud fra 
hinanden, og dette er vel for en Del Grunden ‘til, 
at Hanner inden denne Gruppe saa yderlig sjelden 
er blevne observerede. Ved en noget noiere Under- 
segelse, er det dog meget let at bestemme Kjonnet 
efter 11te Fodpars Bygning. Hos Hannen er nemlig 
dette Fodpar (Tab. XIII, Fig. 20) ganske bygget 
paa samme Maade som de umiddelbart foregaaende 
og efterfolgende Par, medens hos Hunner af samme 
Storrelse den characteristiske Mgkapsel allerede er 
tydeligt udviklet. 
Farven er hos levende Exemplarer af begge 
Kjon paa Oversiden mere eller mindre mork oliven- 
brun, med et temmelig svagt gronligt Skjer, og ofte 
fint spettet med gult og lysebrunt. Undersiden af 
Rygskjoldet og Foddernes ydre Vedheng viser seed- 
vanligvis et redbrunt Skjer, og Munddelene har en 
mere eller mindre hornbrun Farve. Efterat Dyret 
nogen Tid har ligget paa Spiritus, gaar Farven 
imidlertid over til et temmelig ensformigt morke- 
gront. 
the epipodite has also greatly diminished in size. 
The exopodite, on the other hand, is still relatively 
of a considerable size, and differs somewhat in shape, 
having only a limited number of marginal bristles, 
one of which is remarkable for its great length. 
One of the last pair of legs is represented in 
fig. 21 magnified with the same power as fig. 19, 
and in fig. 22, much more highly magnified. In spite 
of its insignificant size, the leg, as will be seen, has 
all its parts, though very greatly reduced. 
The caudal filaments (see Pl. XI, figs. 1—3; Pl. 
XII, figs. 1, 2) which must perhaps be . considered’ 
as a kind of limb, and evidently answer to the 
caudal rami or furca in Nebalia and in the Branchi- 
podide, are of very considerable length, much longer 
than half the length of the body, and seem to be 
movable to a certain extent, as at times they are 
widely divergent, at others directed more straight 
out behind. They issue, one on each side of the 
caudal lamella, from the end of the last caudal seg- 
ment, and taper gradually towards the finely-pointed 
extremity. Their consistence is exceedingly elastic, 
allowing of their being bent in all directions, but 
there seems to be no actual articulation. They are 
furnished with numerous rather oblique, transverse 
rows of fine spines, which, on the inner edge, as- 
sume the character of fine bristles (see Pl. XII, figs. 
23, 24). 
The Male (Pl. XI, figs. 6, 6a) is considerably 
smaller than the female, and attains a length of 
only 13 mm. It exactly resembles young females of 
the same length, without there being any conspi- 
cuous secondary sexual characters. It is therefore 
not easy to distinguish one sex from the other, and 
this is probably partly the reason why the males 
in this group have so very seldom been observed. 
On a closer examination, it is, however, very easy 
to determine the sex by the structure of the 11th 
pair of legs. In the males, the structure of this 
pair of legs (Pl. XIII, fig. 20) is the same as that — 
of the pairs immediately preceding and following it; 
while in females of that size, the characteristic egg- 
capsule is already distinctly developed. 
The colour in living specimens of both sexes is 
of a more or less dark olive brown on the upper 
surface, with a slightly greenish tinge, and: is often 
finely speckled with yellow and light brown. The 
under surface of the carapace, and the outer appen- 
dages of the legs generally exhibit a reddish brown 
tinge, and the oral parts have a horny brown hue. 
After the animal has lain for some time in spirit, 
however, the colour changes to a tolerably uniform 
dark green. eM 
ee a ee 
— ee 
