195 
Beskrivelse. Legemet er (se PI. XVI, Pig. 3) tem- 
melig niulerssetsigt, med stserkt opsvulmet Forkrop og bred 
•%S- Bagkroppen bliver derimod hurtigt more sainmen- 
b’ykt og visor oventil en tydeligt markeret, skjpndt lav Kjol 
^ a «gs ad de 3 forreste Segmenter. Af nogen dorsale Fort- 
S!| tser or imidlertid in tot Spor, heller ikke bemserkes nogen 
lateral Kjol, saaledes som Tilfseldet er bos de tidligere be- 
kjendte Arter af Slsegten. 
Integumeuterne er nieget tynde og gjennemsigtige, det 
bele Dvr derfor temmelig fragilt. 
Hovedet er forholdsvis ussedvanlig lidet, neppe lsengere 
et 'd det lste frie Segment, og gaar fortil i Midten ud i et 
ganske kort, noget buet Pandehorn. Sidehjornerne er noget 
l| dtrnkne ag smalt tilrundede. 
De 4 forreste Par Epimerer er forholdsvis smaa, neppe 
hoiere end selve Kroppen og alle omtrent af ens Storrelse, 
saint nedeutil jevnt afrundede. 4de Par er bagtil noget 
'idrandet til Optagelse af det folgende Par, der er af ssed- 
v anligt Udseende. 
De 3 forreste Bagkropssegmenters Sideplader er store 
°8 brede saint ender alle med et skarpt Hjorne. Paa 3die 
Segment er deres bagre Rand ganske glat, uden Spor af 
Saugtakker, men er oventil ved et dybt, vinkelformigt Ind- 
snit begrsendset fra det tilstodende dorsale Parti. 
Dinene er meget smaa, af oval Form og forsynede 
wied lyst, hvidagtigt Pigment. Deres Beliggenhed er noget 
a noinal, idet de er rykkede ussedvanlig langt ned paa Hove- 
<lets Sider, mer ind mod Sided jornerne. 
lste Par Folere or af ussedvanlig robust Bygning og 
°mtrent saa lange som Forkroppen og lste Bagkropsseg- 
EQe i | t tilsammen. Skaftets 2 forste Led er meget store og 
■kitskulose saint noget fortykkede paa Midten. Derimod er 
°die Led sserdeles lidet og ved en meget bevsegelig Arti- 
culation forbundet med 2det, livorved det mere synes at 
bare til selve Svoben. Denne sidstc er noget lamgere end 
Skaftet og nsesten overalt af ens Tykkelse, cylindrisk samt 
wdnnerket ved de ussedvanlig store, skaalformige V edhseng 
(be saakaldte Oalceoler), hvormed de enkelte Led bagtil er 
forsynede. Disse Vedhseng synes (seFig. 3 a) at danne en 
3-dobbelt Bad og mangier kun paa den alleryderste Del af 
®v0hen. 
2det Par Folere er noget kortere og tyndere end 
lste Par og er ligeledes forsynede med Oalceoler, som dog 
ber er mindre og fsestede langs den forreste Band af Sv0- 
ben og af Skaftets sidste Led. 
Muiulregionen er til Siderne fuldstsendig dfekket al 
lste Par Epimerer, saa at Munddelenes Bygning paa dot 
e neste foreliggende Exemplar er utilgjsengelig for en nser- 
] "ere UndersOgelse. 
De 2 forreste Fodpar er som bos Slsegtens ovrige 
Arter kraftigt udviklede, med store ovale Gfribehsender. 
1 s te Par er noget mindre end 2det og udmserker sig desuden 
Description. — The body (see PI. XYI, fig. 3) is 
rather thickset, with the anterior division greatly swollen 
and the back broad. The posterior division, on the other 
hand, becomes rapidly compressed, exhibiting above, along 
the 3 anterior segments, a distinctly marked though low 
keel. Of any dorsal projections, however, not the slightest 
trace can lie detected, nor is a lateral keel to be observed, 
similar to that in the previously known species of the genus. 
The integuments are very thin and translucent; hence, 
the animal is altogether somewhat fragile. 
The head is remarkably small, scarcely at all larger 
than the 1st free segment, and juts out in the middle, an- 
teriorly, as an exceedingly short, somewhat curved rostrum. 
The lateral corners are slightly produced and narrowly 
rounded. 
The 4 anterior pairs of epimera are comparatively 
small, scarcely higher than the body, and all about equal 
in size, as also evenly rounded off below. The 4th pair 
are somewhat emarginate posteriorly, to receive the suc- 
ceeding pair, which have the usual appearance. 
The lateral plates of the 3 anterior abdominal seg- 
ments are large and broad, all terminating in a sharp 
corner. On the 3rd segment, their posterior margin occurs 
quite smooth, without a trace of denticles, but above is 
marked off, by a deep angular incision, from the adjoining 
dorsal part. . 
The eyes are very small, oval in form, and furnished 
with a light, whitish pigment. Their position is somewhat 
anomalous, occurring, as they do, unusually far down the 
sides of the head, in close proximity to the lateral corners. 
The 1st pair of antennae are remarkably robust in 
structure, and about as long as the anterior division and the 
1st abdominal segment taken together. The first 2 joints 
of the peduncle are very large and muscular, as also some- 
what incrassated in the middle. On the other hand, the 
3rd joint is exceedingly small, and connected by a very 
movable articulation with the 2nd, thus giving it the ap- 
pearance of belonging rather to the flagellum. The latter 
is somewhat longer than the peduncle, and throughout well- 
nkh uniform in thickness, as also characterized by the re- 
markably large calyx-shaped appendices (the so-called cal- 
ceolm) with which the several joints are furnished behind. 
These’ appendices (see fig. 3 a) would appear to constitute 
a triple series, and are nowhere absent save on the extreme 
outermost part of the flagellum. 
The 2nd pair of antennae are a trifle shorter and 
more slender than the 1st, and also furnished with cal- 
ceolae. which, however, are somewhat smaller, and attached 
to "the anterior margin of the flagellum and the last joint 
of the peduncle. . 
The buccal region is entirely covered on both sides by 
the i s t pair of epimera; and hence the structure of the 
oral appendages in the only specimen before us could not 
he submitted to a close examination. 
The 2 anterior pairs of legs exhibit, as in the other 
species of the genus, a most powerful development, with large, 
oval hands. The 1st pair are somewhat smaller than the 
