98 
med 2 hoie koniske Fortsatser, der er stillede jevnsides 
noget bag Midten af dets Laengde. 
lste F orkropsseginent udmterker sig fra de ovrige der- 
ved, at dets Sidedele eller Epimerer danner en fortilbpiet 
tungef'ormig Lap, der delvis diekker Siderne af Hovedet. 
Det er ligeledes oventil i Midten forsynet mod 2 koniske 
Fortsatser; men disse er her betydelig mindre. 
De 3 fplgende Segmenter tiltager succesivt. i Ltengde 
bagtil. og det sidste af dem (4de Segment) er kjendeligt 
storre end nogen af de pvrige. Ethvert af disse Segmenter 
bar paa Rygsideu 2 lignende koniske Fortsatser som de, 
der Andes paa Hovedet og er forsynet med smaa. fra 
Segmenterne tydeligt adskilte Epimerer. 
De 3 sidste Forkropssegmenter er igjen noget kortere 
end de foregaaende og ligesom disse oventil forsynede med 
et Par koniske Fortsatser, der dog her er noget mindre. 
Epimererne er stserkt udstaaende til Siderne, triangukert 
tilspidsede og ved en tydeligt markeret Sntur skilt fra Seg- 
menterne. 
Bagkroppen, der indtager noget mere end 7a af To- 
talkengden, bestaar af 3 Segmenter. De 2 forste er ganske 
koi'te og skiller sig lidet i Udseende fra de foregaaende 
Forkropssegmenter. Ligesom disse har etlivert af dem oven- 
til 2 korte koniske Fortsatser, kvorimod Epimererne her 
ikke ved nogen Sutur er skilt fra Segmenternes Sidedele. 
Sidste Segment er meget stort, oventil hvselvet og bagtil 
koniskt uddraget. Det har ved Basis 2 temmelig store tri- 
anguhere Fortsatser, der staar ud til hver Side, og paa 
Midten af Dorsal I laden 2 smaa, tset sammen stillede Torner, 
0inene er store, nsesten halvkugleformigt fremstaaeude 
og seede fra Siden af rnesten nyredannet Form, med den 
forreste Rand concav, den bagerste stserkt convex. Deres 
Pigment er af en dyb sort Farve. 
lste Far Folere (Fig. 3 og 4) udspringer taet sammen 
fra den forreste Rand af Hovedet. De er ganske korte, 
kun lidet lamgere end Hovedet og bestaar af et 3-leddet 
Skaft og en uleddet Svobe. Skaftets lste Led er meget 
bredt, noget pladedannet og af afrundet oval Form, med 
den indre Kant grovt knudret. De 2 folgende Led er 
meget smalere og forsynede med stnmpe Saugtakker i den 
indre Kant. Svoben er omtrent saa lang som disse til- 
sammen, noget sammentrykt og langs den ydre Kant for- 
synet med en tiet; Rad af eiendommelige Sandsevedhseng. 
Ved stserk Forstorrelse viser disse. (se Fig. 5) ligesom 3 
forskjellige Afsnit, et kort og noget indknebet basalt Parti, 
en midterste cylindrisk Del og en smrdeles gjennemsigtig 
og pladeformig, i Enden stumpt afrundet Endedel. 
2det Par Fplere (se Fig. 1 og 2) udspringer ligeledes 
fra Hovedets forreste Rand, til hver Side af og noget neden- 
under lste Par. De er sserdeles kraftigt byggede og over- 
gaar betydelig i Laengde det hele Legeme. Ialmindelighed 
er de mere eller mindre stferkt nedadkrummede, idet deres 
forskjellige Led danuer knseformige Bpininger med hinanden; 
2 elevated conical projections, placed side by side, a little 
posterior to the median part of its length. 
The 1st segment is distinguished from the others by 
its lateral portions, or epimera, constituting an anteriorly 
curved, linguiform lobe, that partially covers the sides of 
the head. It is also furnished above, in the middle, with 
2 conical projections, which, however, are much smaller 
than those on the head. 
Of the succeeding segments, 3 increase backward suc- 
cessively in length, and the last of them (4th segment) is 
perceptibly larger than any of the others. Each of these 
segments has on the dorsal side 2 conical projections, sim- 
ilar to those on the head, and is furnished with small 
epimera, distinctly separated from the segments. 
The last 3 segments belonging to the anterior division 
are, too, somewhat shorter than the preceding, and, in like 
manner, furnished with a pair of conical projections, which, 
however, are somewhat smaller. The epimera, strongly 
projecting toward the sides, are triangularly pointed, and 
separated by a distinct suture from the segments. 
The posterior division of the body, measuring a little 
more than one-third of the total length, is composed of 3 
segments. The 2 first are quite short, and differ but slightly 
in appearance from the preceding segments. Like the latter, 
each is furnished above with 2 short, conical projections, 
whereas no suture separates the epimera from the lateral 
portions of the segments. The last segment is exceedingly 
large, arcuate above, and conically produced posteriorly. 
It has at the base 2 rather large triangular projections, 
jutting out on either side, and, in the middle of the dorsal 
surface, 2 small, closely set spikes. 
The eyes are large, well-nigh hemispherically protrud- 
ing, and, viewed from the sides, almost reniform in shape, 
with the anterior margin concave, the posterior exceedingly 
convex. Their pigment is of a deep black. 
The 1st pair of antennae (figs. 3, 4) spring, close 
together, from the anterior margin of the head. They are 
quite short, very little longer than the head, and consist 
of a three-jointed peduncle and a simple flagellum. The 
1st joint of the peduncle is very broad, somewhat laiuelli- 
form , and rounded - oval , with the inner edge coarsely 
rugged. The 2 succeeding joints are much narrower, and 
furnished with obtuse teeth along the inner edge. The 
flagellum is about equal in length to both these joints 
taken together, somewhat compressed, and. on the inner 
edge, provided with a close-set series of peculiar sensory 
appendages. When highly magnified, the latter exhibit (see 
fig. 5), as it were, 3 different sections: — a short aud some- 
what constricted basal portion, a median cylindric part, and 
a perfectly translucent and lamelliform terminal section, 
obtusely rounded at the extremity. 
The 2nd pair of antennae (see figs. 1, 2) likewise ori- 
ginate from the anterior margin of the head, on either side 
of and somewhat below the 1st pair. They are remarkably 
•powerful in structure, and considerably exceed the whole 
of the body in length. As a rule, they are more or less 
bent downward, their various joints constituting one with 
