og skraat bagudrettede. Nerverne for Aarerne (a *) 
udspringer ogsaa her fra de fra Hjernegangliet bagud 
gaaende Commissurer. Buggangliekjeden (Tab. XX, 
Fig. 19) ligner samme hos Limnadia, dog med den 
Forskjel, at Nervestammerne er forholdsvis sterkere 
og ligger noget nermere sammen. Antallet af 
gangliose Opsvulmninger er selvfolgelig, i Overens- 
stemmelse med det langt ringere Antal Fodpar, 
mindre end hos Limnadia. 
Ovarierne (se Tab. XIX, Fig. 1) er af betydelig 
Storrelse, strekkende sig til hver Side af Tarmen 
gjennem hele Truncus. De viser et sterkt lappet 
Udseende, idet Hgfolliklerne grupperer sig drueklase- 
formigt omkring Ovarialrorene (se Tab. XX, Fig. 13). 
Mglederen udgaar fra den bagerste Del af hvert 
Ovarium og synes at udmunde umiddelbart under 
de ovenomtalte trefligede dorsale Blade. Paa dette 
Sted ser man nemlig ofte storre Masser af modne 
JEg samlede. Som hos Limnadia, indeholder hver 
Mgfollikel 4 Celler, hvoraf alene den terminale bli- 
ver til det egentlige Ag, medens de 3 svrige fore- 
stiller Neringsceller og derfor tilsidst ganske absor- 
beres (se Fig. 14—17). De af Ovarierne udkomne 
Hg grupperer sig sammen til 2 rundagtige kage- 
formige Masser, der beres under Skallen helt bagtil 
(se Tab. XVIIT, Fig. 1 og 2). Hver igmasse inde- 
holder et stort Antal af Mg; der ved et klebrigt 
Stof er heftede sammen. Xggene er omgivne af en 
simpel, ikke meget fast Kapsel, uden nogen ioine- 
faldende Skulptur. 
Testes (se Tab. XX, Fig. 6) har samme Belig- 
genhed som Ovarierne og ligner disse ganske hvad 
Anordningen af Folliklerne angaar (se Fig. 12). 
Disse sidste er imidlertid her alle af nogenlunde 
ens Storrelse og af noget uregelmessig Form, samt 
indeholder hver en med den centrale Kanal i For- 
bindelse staaende Hule, i hvis Vegge de meget smaa 
celleagtige Sedelementer udvikle sig. Mundingen 
for vasa deferentia synes at ligge omtrent paa 
samme Sted som Mundingen for Mglederne hos 
Hunnen. 
Udvikling. — Jeg har desverre ikke selv havt 
Anledning til at studere denne Phyllopodes Udvik- 
ling. Men ifolge Grubes Undersogelser synes den i 
flere veesentlige Punkter at skille sig fra den hos 
andre Phyllopoder. Larven har et meget eiendom- 
meligt Udseende, som noget minder om samme hos 
Cirripedierne. Selv i det tidligste af Grube obser- 
verede Stadium, som ifolge Lemmernes Beskaffenhed 
ubetinget er et Nauplius-Stadium, er nemlig Lege- — 
met dekket oventil af. et meget stort fladt Ryg- 
skjold, og har nedentil et lignende men mindre Skjold, | 
der forestiller Overleben. Hovedet har en meget 
eiendommelig Form, idet det gaar ud i3 korsformigt 
RD 
Ist pair of antenne (a’), are very much elongated, 
and directed obliquely backwards. The nerves for 
the oars (a*) also originate hére, starting from the 
commissures which run backwards from the cerebral 
ganglion. The ventral ganglion chain (Pl. XX, fig. 
19) resembles that in Limmadia, though with the 
difference that the nerve stems are comparatively 
stronger, and lie rather nearer together. The num- 
ber of ganglionic dilatations is, of course, in accor- 
dance with the far smaller number of legs, less than 
in Limnadia. 
The ovaries (see Pl. XIX, fig. 1) are of consi- 
derable size, extending through the whole trunk on 
each side of the intestine. They present a very 
much lobed appearance, from the fact that the egg- 
follicles are grouped botryoidally about the ovarial 
tubes (se Pl. XX, fig. 13). The oviduct issues from 
the hind part of each ovary, and seems to open 
immediately below the before-mentioned tri-lobed 
dorsal lamella; for at that place large masses of 
mature eggs are often seen accumulated. As in Lim- 
nadia, each egg-follicle contains 4 cells, of which 
the terminal one only becomes the true egg, the 
other 3 representing alimentary cells, and being 
therefore at last quite absorbed (see figs. 14—17). 
The eggs that have issued from the ovaries congre- 
gate into 2 round, cakelike masses, which are borne 
beneath the shell at the very back (see Pl. XVIII, 
figs. 1 and 2). Each eggmass contains a large 
number of eggs, which are fastened together by a 
glutinous substance. The eggs are surrounded by a 
simple, not very firm capsule, without any conspi- 
cuous seulpturing. 
The testes (see Pl. XX, fig. 6) have the same 
position as the ovaries, and resemble them exactly 
as regards the arrangement of the follicles (see fig. 
12). Here, however, the latter are all of about the 
same size, and of a somewhat irregular shape; each 
contains a cavity communicating with the central 
channel, and in whose walls the very small, cellular 
seminal elements are developed. The opening of 
the vasa deferentia appears to lie at about the 
same place as the mouth of the oviducts in the 
female. 
Development. — I have unfortunately not had 
an opportunity, personally, of studying the develop- 
ment of this Phyllopod; but, according to Grube’s 
investigations, it seems, in several essential points, 
to differ from that of other Phyllopoda. The larva 
has a very peculiar appearance, somewhat resem- 
bling that of Cirripedia. Even in the earliest stage 
observed by Grube, which, from the condition of 
the limbs, is unquestionably a nauplius stage, the 
body is covered above by a very large flat cara- 
pace, and has a similar, but smaller shield below, 
which represents the labrum. The head has a very 
peculiar shape, for it projects in 3 cruciformly-placed 
