— 
i = 
= 
a 
dreies om sin Axe. Dette sker ved Hjelp af 3 tynde 
Muskler, der fra Hovedets Integument passerer bag- 
fra fortil til hvert Gie (Fig. 10, m). 
Det enkle Gie (Tab. XV, Fig. 2, 4, oc) ligger i 
en temmelig betydelig Afstand fra de sammensatte 
Mine, lige ved Basis af Rostrum, og har, seet fra 
Siden (Fig. 2) en trekantet Form, med den ovre 
Ende spidst udtrukket. Ved noiere Undersogelse 
(se Tab. XVI, Fig. 11, 12, 13) viser det et noget 
prismatiskt Udseende, idet man paa det kan adskille 
4 Flader, begreendsede ved skarpe Kanter og hver 
indfattet af en smal Stribe af morkerodt Pigment: 
2 fortil sammenstodende Sideflader, en bagre Flade 
og en nedre Flade. Den sidste er den mindste, de 
3 ovrige omtrent af ens Storrelse. Alle Flader 
viser i visse Belysninger en sterkt iriscerende 
Glands, men tager sig ialmindelighed ved direkte 
paafaldende Lys opakt hvide ud. Det enkle Mie er 
holdt i Situs ved 2 tynde strengformige Ligamenter, 
hvoraf det ene passerer fra den spidst udtrukne 
ovre Ende af Organet skraat opad ind i Hovedets 
Pandedel, og fester sig her til en liden grubeformig 
Fortykkelse af Integumentet lige under de sammen- 
satte Oine. Det andet Ligament udgaar fra For- 
kanten af den nedre Flade og begiver sig direkte 
ind i Rostrum, hvor det oploser sig i flere korte 
Smaagrene, hver endende med en liden knapformig 
Fortykkelse (se Tab. XV, Fig. 2, Tab. XVI, Fig. 9). 
Forste Par Folere (Tab. XV, Fig. 2, 3, 4, a}, 
Fig. 5), der udspringer til hver Side ved den nedre 
Del af Hovedet, bag Rostrum, er mindre rudimen- 
tere end hos de i det foregaaende beskrevne Phyl- 
lopoder, og neesten af Hovedets Lengde. De be- 
staar hver (se Fig. 5) af en kort Basaldel og en 
smalt kolleformig Endedel, der i Forkanten viser et 
noget vexlende Antal (fra 5—8) afrundede Lappe, 
hvoraf de 2 yderste indtager Spidsen af Foleren. 
Alle disse Lappe er tet besatte med smaa Lugte- 
papiller, som ved sterk Forstorrelse (Fig. 6) viser 
sig at bestaa af en kort, skarpt kontureret Stilk og 
en serdeles delikat cylindrisk Endedel, forsynet 
strax indenfor Spidsen med en liden gjennemsigtig 
Blere. Prof. Lilljeborg har troet at finde paa Ende- 
delen af Foleren et Antal af fine Tveersuturer, saa- 
ledes ordnede, at egentlig enhver af de laterale 
Lappe skulde tilhore et serskilt Led. Jeg har dog 
ikke paa de af mig undersogte Exemplarer kunnet 
med Sikkerhed paavise en saadan Leddeling, som 
derimod hos visse Arter af Estheria er meget tydeligt 
udpreget. Ved Hjelp af nogle tynde Muskler, der 
fra Hovedet passerer ind i Basaldelen kan disse 
Folere til en vis Grad beveges frem og tilbage. 
Andet. Par Folere (Tab. XVI, Fig. 1) er megtigt 
udviklede og forestiller Dyrets vesentligste Bevege- 
organer. De udspringer med en bred Basis fra 
91 
These movements are accomplished by the aid of 
3 thin muscles, which pass from the back of the 
integument of the head, forwards to each eye 
(fig. 10, m.). 
The ocellus (Pl. XV, figs. 2, 4, oc) is situated 
at rather a considerable distance from the compound 
eyes, close to the base of the rostrum, and, when 
seen from the side (fig. 2), exhibits a triangular 
shape, with the upper end drawn out acutely. On 
closer observation (see Pl. XVI, figs. 11, 12, 13), it 
presents somewhat of a prismatic appearance, 4 sur- 
faces, bounded by sharp edges, and each bordered 
by a narrow band of dark-red pigment, being dis- 
tinguishable, viz, 2 lateral surfaces meeting in front, 
1 posterior surface, and 1 inferior. The last is the 
smallest, the other 3 of almost uniform size. In 
certain lights, all the surfaces. have an iridescent 
lustre, but generally appear opaquely white under 
directly falling light. The ocellus is kept in posi- 
tion by 2 thin cord-like ligaments, one of which 
passes from the acutely drawn-out end of the organ, 
obliquely upwards into the frontal part of the head, 
there attaching itself to a small pit-like thickening 
of the integument, just below the compound eyes. 
The other ligament issues from the anterior edge 
of the inferior surface, and proceeds directly into 
the rostrum where it is resolved into several short 
ramuli, each terminating in a small bud-like expan- 
sion (see Pl. XV, fig. 2; Pl. XVI, fig. 9). 
The first pair of antenne (PI. XV, figs. 2, 3,4, a‘, 
fig. 5), which spring out to each side from the lower 
part of the head, behind the rostrum, are less rudi- 
mentary than in the previously-described Phyllo- 
pods, and are almost as long as the head. They 
each consist (see fig. 5) of a short basal part and 
a narrow club-like terminal part, on whose front 
margin is a somewhat varying number (from 5 to 8) 
of rounded lobes, of which the two outermost occupy 
the point of the antenna. All these lobes are thickly 
set with small olfactory papille, which, when highly 
magnified (fig.6) prove to consist of a short, sharply- 
defined stalk, and an exceedingly delicate cylindrical 
terminal part, provided, just within the point, with 
a small, transparent vesicle. Prof. Lilljeborg states 
having found a number of fine transverse sutures, 
so arranged that each of the lateral lobes belongs 
to a separate joint. I have not, however, in the 
specimens I have examined, been able to make out 
with certainty such an articulation, which, on the 
other hand, is very distinct in certain species of 
Estheria. By the aid of some fine muscles, which 
run from the head into the basal part, these an- 
tenne can to a certain extent be moved backwards 
and forwards. 
The 2nd pair of antenne (Pl. XVI, fig. 1) are 
powerfully developed, and they. constitute the ani- 
mal's principal organs of locomotion. They issue 
