40 
er (se Fig. 3 a, 3 b) forlioldsvis bred, og, da de fra samme 
radierende Sidefortsatser er nteston sammenst0dende, faar 
herved det centrale Parti af Legemet ved forste 0iekast 
Udseendet af en mere, eller mindre cirkelformig Skive ; 
lieraf Artsbetegnelseme circularis og discoidea. AlleKrops- 
segmenter er tydeligt begrsendsede ved vel ruarkerede Su- 
turer, og det forreste (Hovedsegmentet) som ssedvanlig det 
storste, skjent ncppe lsengere end de 3 falgende tilsammen. 
Ved en stserk median Indknibning er dette Segment delt i 
2 Partier, hvoraf det forreste ioresiiller Pandedelen, det ba- 
gerste den fodbserende Del. Begge er kun skilr ved et 
ganske smalt Mellemrum, og nogen egentlig Hals er saale- 
des i Grunden ikke tilstede. Pandedelen er staerkt fortyk- 
ket og oventil forsynet med en Tvserrad af smaa pigformige 
Fortsatser; dens forreste Kant er noget ndrandet i Midten, 
mellem Insertionen af Saxlemmerne. De 2 folgeude Krops- 
segmenter er hvert i Midten af Rygsiden forsynet med en 
Lsengderad af lioio pigformige Fortsatser, hvoraf de paa det 
bagre Segment er more eller mindre sammensmeltede ved 
Roden (se Fig. 3 a). Saxlvanligvis findes paa det forreste 
Segment 3, paa det bagerste 4 saadanne Fortsatser, alle 
fint cilierede i Kanterne og bavrende i Spidsen , en enkelt 
stiv Borste. Legemets Sidefortsatser (se Fig. 3 b) er for- 
lioldsvis store, omtrent saa lange soar Kroppcn er bred, og 
af noget kelledannet Form; ved Enden bar liver af dem 
oventil en Krands af lignende pigformige Fortsatser, som 
de paa Rygsiden af Kroppen. Som ssedvanlig er de 2 Par 
midterste Sidefortsatser de storste og sidste Par mindst. 
Halesegmentct (Fig. 3 g) er forlioldsvis langt, horizontalt, og 
af smal cylindrisk eller noget konisk Form, samt forsynet 
med smaa Pigge oventil og i Kanterne. 
Giekuuden, der omtrent er beliggende paa Midten af 
Hovedsegmentet, er (se Fig. 3 a) forlioldsvis lav og stumpt 
tilrundet, samt noget bagndrettet. Synselementerne er vel 
udviklede og af ssedvanlig Bygning. 
Snabelen, der er noget skraat nedadrettet (se Fig. 3 a), 
er adskilligt kortere end Hovedsegmentet og af konisk 
Form, med Spidsen mammilleformigt uddraget; omkring 
Mundaabningen findes en tset Krands af sserdeles fine Bur- 
ster, der dog mangier bos ganske nnge Excmplarer (se 
Fig. 3 h). 
Saxlemmerne er lios fuldt udviklede Exemplarer (se 
Fig. 3 a, 3 b) meget kraftigt udviklede, skjant ikke af no- 
gen sserdeles betydelig Lsengde. Skaftet er tvkt, cylindriskt 
og oventil ved Enden forsynet med en Tvserrad af 4 pig- 
formige Fortsatser, hvoraf navnltg den yderste udmaerker 
sig ved betydelig Storrelse. Haanden, der er skraat nedad- 
og indadrettet mod Spidsen af Snabelen, er omtrent af 
Skaftets Lsengde og staerkt opsvnlmet, nsesten af triangulser 
Form og paa den ovre Side forsynet med korte borstebse- 
rende Fortsatser og spredte Haar. Fingrene er meget korte, 
staerkt indadrettede og ender begge i en stump Spids. Den 
bevsegelige Finger er ganske glat, hvorimod den ubevsege- 
lige liar et staerkt knudeformigt Fremspring i Midten af 
itself (see fig. 3 a, 3 b) is comparatively broad, and as the 
lateral processes radiating therefrom are well-nigh contiguous, 
the central part of the body acquires, thus, at the first glance, 
the appearance of a more or less circular disc: hence the 
specific designations circularis and discoidea. All the seg- 
ments of the body are distinctly defined by well marked 
sutures, the foremost (cephalic segment) being as usual 
the largest, although hardly longer than the 3 succeeding 
ones taken together A deep median constriction divides this 
segment into 2 portions, of which the foremost represents 
the frontal, and the hindmost the pediferous part. They are 
separated by only an exceedingly narrow interval, and a neck 
therefore, strictly speaking, does not exist. The frontal part 
is very much tumificated. and furnished above with a 
transverse series of small spiniform projections; its anterior 
edge is somewhat emarginate in the middle, between the 
insertions of the chclifori. The 2 succeeding segments 
of the trunk are each provided in the middle of the 
dorsal side with a longitudinal series of prominent spiniform 
projections, those on the posterior segment coalescing, more 
or less, at the base (see fig. 3 a). There occur on the foremost 
segment, as a rule, 3, on the hindmost 4 such processes, all 
delicately ciliated along the edges and hearing at the point 
a single stiff bristle. The lateral processes of the body (see 
fig. 3 b) are comparatively large, about as long as the trunk 
is broad, and somewhat clavate in form; at the extremity, 
each lias a wreath of spiniform projections similar to those 
on the dorsal side of the trunk. As usual, the 2 middle pairs 
of lateral processes are largest, and the last pair smallest. 
The caudal segment (fig. 3 g) is comparatively long, hori- 
zontal, and of a narrow cylindric or somewhat conic form, 
and is also furnished above and at tire edges with small 
spines. 
The oenliferous tubercle, located at about the middle 
of the cephalic segment (see fig. 3 a), is comparatively low 
and obtusely rounded, and has a somewhat backward direc- 
tion. The visual elements are well developed and of the 
usual structure. 
The proboscis, which is directed somewhat obliquely 
downwards (see fig, 3 a), is a good deal shorter than the 
cephalic segment, and conic in form with the point mamilli- 
form exsorted ; round the oral orifice is seen a dense wreath 
of exceedingly delicate bristles, which is absent, however, in 
very young specimens (see fig. 3 h). 
The chclifori are, in full-grown specimens (see figs. 3 a, 
3 h), very powerfully developed, although not of any con- 
siderable length. The scape is thick, cylindric, and fur- 
nished above, at, the extremity, with a transverse series of 
4 spiniform projections, the outermost of which, in particular, 
attains a considerable size. The hand, directed obliquely 
downward and inward, towards the tip of the proboscis, is 
about the length of the scape and much swollen, almost trian- 
gular in form, and provided on the upper side with short seti- 
lerous processes and scattered hairs. The fingers are very 
short, directed considerably inwards, and terminate, both ot 
them, in an obtuse point. The mobile finger is quite smooth, 
whereas the immobile one has a prominent modular 
