Udspringet for Nerverne til 1ste Par Folere, nemlig 
en meget tynd Nerve for de i Basaldelen af disse 
Folere indtreedende Muskler, og en betydelig steerkere 
Nervestamme, der passerer ind i den kolleformige 
Endedel og til enhver af de laterale Lappe udsen- 
der talrige Fibrer (se Tab. XV, Fig. 5). Nerverne 
for 2det Par Folere (a*) udgaar ikke fra Hjerne- 
gangliet selv, men fra de fra samme bagtil udgaaende 
steerke Commissurer, der omgiver Spiseroret for at 
forbinde sig med Buggangliekjaden. Man kan tyde- 
ligt adskille 2 saadanne Nerver af omtrent ens 
Tykkelse og udspringende tet sammen, noget foran 
Midten af Commissurerne, som paa dette Sted viser 
en ganske svag ganglios Opsvulmning. Angaaende 
disse Nervers videre Forlob ind i selve Folerne, har 
det dog ikke veret mig muligt at skaffe mig noget 
tilfredsstillende Begreb. 
Den ovrige Del af Centralnervesystemet er 
meget vanskelig at observere og lader sig neppe 
hverken ved Dissection eller ved andre Methoder 
fremstille i sin Helhed. Jeg har imidlertid stykke- 
vis kunnet ngiere undersoge samme og fundet, at 
den, som hos Branchipodiderne, dannes af 2 vidt 
adskilte sterke Nervestammer, der passerer bagtil 
langs Bugsiden af Truncus og i hvert Segment er 
forbundne med 2 tynde Tvercommissurer. Nerve- 
stammerne viser paa dette Sted en ganske svag 
ganglios Opsvulmning og udsender udad, i adskillig 
Afstand fra hinanden, 2 sterke Nerver, hvoraf den 
ene treder ind i den respective Fod, medens den 
anden synes at udbrede sig i Kroppens Side- 
muskulatur. 
Forplantningsapparat. — Da alle hidtil obser- 
verede Exemplarer af denne Phyllopode har vist sig 
at vere af Hunkjon, har vi her kun at omtale 
Hunorganerne eller Ovarierne. Disse (se Tab. XV, 
Fig. 1) har Formen af 2 noget skrueformigt dreiede 
Ror, der strekker sig igjennem Storsteparten af 
Truncus, til hver Side af Tarmen, og ender bagtil 
med en ‘smalere spidst udlobende Del. Bagenfor 
Midten udgaar fra hvert Ovarium nedad en kort 
Agleder, der udmunder i Basis af den tilsvarende 
Fod af 1lte Par. Fra Overfladen af Ovarialrorene 
udgaar talrige smaa blindsekformige Udvidninger, 
som hos ganske unge Individer (se Tab. XVI, Fig. 15) 
viser et temmelig uniformt Udseende, medens de hos 
zldre Individer antager en meget forskjellig Udvik- 
ling og delvis grupperer sig paa en drueklaseformig 
Maade (se Fig. 16, 17). Disse Udvidninger er Ag- 
folliklerne, hvori AAggenes forste Dannelse foregaar. 
Undersoges disse Follikler noiere (se Fig. 18), vil 
man i deres Indre altid finde, som hos Lepidurus, 
4 Celler combinerede, hvoraf blot den yderste bliver 
til det virkelige Mg, medens de 3 ovrige forestiller 
Neringsceller. Paa de mindste Follikler, der er 
nogenlunde cylindriske af Form, er alene de 4 Celle- 
98 
fig. 10), but are of a similar conical shape. From 
them originate the nerves for the 1st pair of an- 
tenn, viz., a very fine nerve for the muscles in the 
basal part of these antenne, and a much stronger 
nerve-stem which passes into the club-like terminal 
part, and sends off numerous fibres to each of the 
lateral lobes (see Pl. XV, fig. 5). The nerves for 
the 2nd pair of antenne (a?) do not issue from the 
cerebral ganglion itself, but from the strong com- 
missures running backwards from it, which surround 
the esophagus in order to join the ventral ganglion 
chain. Two such nerves can be clearly distinguished, 
of about equal thickness, and issuing close together 
a little in front of the middle of the commissures 
which here exhibit a very slight ganglionic swelling. 
’ As regards the further course of the nerves in the. 
antenne themselves, it has not been possible for 
me to obtain any very satisfactory idea. 
The remainder of the central nervous system is 
very difficult to observe, and scarcely allows of 
being represented in its entirety, either by dissec- 
tion or by any other method. I have, however, been 
able to examine parts of it in detail, and have 
found that, as in the Branchipodide, it is formed of 
2 widely-separated, strong neryve-stems, passing back- 
wards along the ventral side of the trunk, and 
connected in each segment with 2 thin transverse 
commissures. The nerve-stems here exhibit a very 
slight ganglionic swelling, and send out outwards, 
at a considerable distance from one another, 2 strong 
nerves, one of which enters the corresponding leg, 
‘while the other seems to spread over the lateral 
musculature of the body. 
Sexual Organs. — As all the specimens of this 
Phyllopod hitherto observed have proved to be of 
the female sex, we have here only to describe the 
female organs or ovaries. These (see Pl. XV, fig. 1) 
are in the shape of 2 tubes, twisted somewhat after 
the manner of a screw, which extend through the 
greater part of the trunk on each side of the intes- 
tine, ending behind in a narrower, pointed part. 
Beyond the middle, a short oviduct issues in a 
downward direction from each ovary, opening one 
on each side at the base of the 11th leg. From the 
surface of the ovarial tubes, there issue numerous 
small cecal expansions, which in quite young speci- 
mens (see Pl. XVI, fig. 15) present a fairly uniform 
appearance, while in older animals they assume a 
very varied development, and are to a certain 
extent grouped in a botryoidal manner (see figs. 16, 
17). These expansions are the egg-follicles, in which 
the earliest formation of the ova takes place. On 
a close examination of these follicles (see fig. 18) 
there will always be found inside them, as in Le- 
pidurus, 4 cells combined, of which only the outer 
one turns into a true ovum, while the other 3 
represent alimentary cells. In the smallest follicles, 
