skilte, tilspidsede Plader, der delvis dekker Anal- 
aabningen nedentil (se Tab. III, Fig. 12). 
@inene (Tab. II, Fig. 1 og 7, 0, Fig. 3 og 4), der 
er feestede temmelig ner sammen ved den forreste 
Ende af Hovedet, lige under Pandepladens Basis, 
er vel udviklede og omtrent af Pandepladens halve 
Lengde. De er tydeligt stilkede og meget frit be- 
vegelige, saa at de snart kan rettes ud til hver 
Side, snart legges tet ind mod hinanden og boies 
nedad, i hvilket Tilfeelde de ganske skjules mellem 
den forreste Del af Rygskjoldets Valvler. Af Form 
er de noget sammentrykte, aflangt ovale, eller new- 
sten halvmaanedannede, med den ydre Del noget 
udvidet og skjevt afrundet, endende nedentil i et 
vinkelformigt Hjerne. Forkanten af Oiet er ganske 
glat, uden Spor af de sterke Sagtakker, som findes 
her hos Sl. Paranebalia. Qiepigmentet, der hos det 
levende Dyr er af en vakker purpurrod Farve, fyl- 
der nesten ganske den ydre Halvpart af Qiet, og 
fra det udstraaler til alle Kanter talrige Synsele- 
menter, i Form af smaa sterkt lysbrydende Legemer 
(Krystalkegler) af kort peredannet Form. Derimod 
mangler den @iet omgivende Hud (Cornea) ganske 
ethvert Spor af nogen egentlig Facettering som hos 
‘de heiere Crustaceer. Hvert Qie dekkes ved Roden 
af en fra Pandedelen udspringende skjelformig, i en 
skarp Spids udgaaende Plade, der nesten rekker til 
Midten af Wiets Leengde (se Fig. 3, 4). 
De ovre Folere (Tab. II, Fig. 1, a’, Fig. 5), der 
udspringer lige under Winene, er af kraftig, nesten 
fodformig Bygning og, lige udstrakte, omtrent af 
af Forkroppens Lengde. Man kan paa dem adskille 
et tykkere, dobbelt vinkelbsiet Skaft og 2 terminale 
Vedheeng af ulige Form, hvoraf det ene har Ud- 
seendet af en skjelformig Plade, det andet af en 
forlenget, mangeleddet Svebe. Skaftet bestaar af 
4 Segmenter, hvoraf de 2 yderste er fast forbundne 
med hinanden, medens det foregaaende (2det) Led 
har en meget bevegelig Articulation saavel med 
iste som 3die Led. iste Led af Skaftet er, som det 
synes meget fast forbundet med Hovedet og kun 
lidet bevegeligt, hvorfor det ved Dissection vanske- 
ligt kan erholdes i Forbindelse med den ovrige Del. 
Det er (se Fig. 1, Fig. 7 a‘) af oval Form, uden en- 
hver Borstevebning og opfyldt med sterke Muskel- 
13 
serrated, as in the posterior segments of the former. 
The caudal rami are articulated to the extremity of 
the last segment; they appear. to correspond to the 
so-called furca of the Copepods, and may, therefore, 
be most properly considered to be a bifurcated 
terminal segment. Below the base of the candal 
‘rami the last segment projects into 2, by a narrow 
median incision, separated acuminate lamella which 
partly cover the anal aperture beneath (see Pl. IIT 
fig. 12). 
The eyes (Pl. II, fig. 1 and 7, 0, figs. 3 and 4), 
which are secured pretty closely together at the 
foremost extremity of the head, just below the base 
of the frontal plate, are well deyeloped and about 
half the length of the frontal plate. They are 
distinctly stalked and very freely mobile, so that 
they may be directed, now to each side now laid 
close in to each other and bent downwards, in 
which case they become quite concealed between 
the foremost part of the valves cf the carapace. 
In form they are somewhat compressed, oblongo- 
oval, or almost semi-lunar, with the outer part 
somewhat expanded and obliquely rounded, ter- 
minating below in an angular corner. The anterior 
edge of the eye is perfectly smooth without 
trace of the powerful sawteeth found in the gen. 
Paranebalia. The ocular pigment, which, in the liv- 
ing animal, has a beautiful purple-red colour, occu- 
pies almost completely the outer half of the eye, 
and from it radiate numerous visual elements in 
all directions, in the form of small, strongly re- 
fractive bodies (crystal cones) of short pyriform 
shape. On the other hand the enclosing integument 
(cornea) of the eye is quite deficient in every trace 
of any real facets such as exist in the higher Cru- 
staceans. Hach eye is covered at the base by a 
squamiform plate that issues from the frontal part, 
and terminates in a sharp point which reaches 
nearly to the middle of the length of the eye (see 
figs. 3, 4). 
The superior antenne (PI. II, fig. 1 a‘, fig. 5), which 
issue just under the eyes, are of powerful, almost 
pediform structure, and when straightly extended 
are about same length as the anterior division of 
the body. We can in them distinguish a thickish 
doubly geniculated peduncle and 2 terminal appen- 
dages of dissimilar form, of which the one has the 
appearance of a squamiform plate, the other of a pro- 
longed multi-articulate flagellum. The peduncle con- 
sists of 4 segments, of which the two outermost 
ones are firmly attached to each other, while the 
preceding joint (2nd) has a very flexible articulation 
both with the Ist and 3rd joints. The Ist joint of 
the peduncle is, apparently, very firmly connected to 
the head and but little flexible, hence it can with 
difficulty be obtained on dissection, in union with 
the remaining part. It is oval in form (see fig. 1, 
