8 
Af Knuder eller Tuberkler Andes kun et meget be- 
grsendset Antal fordelte paa Rygskjoldets Overflade og som 
ssedvanligt strsengt symetriskt orduede. Paa den stmrkt 
convexe Maveregion bemserkes i Midten bagtil en stump 
Forheining og til hver Side af denne en mind re, men tyde- 
ligere begrsendset afrundet Knude. Hos det ene af de to 
undersogte Individer fandtes desuden i Midtlinien lsengere 
fortil cn meget liden. men ganske tydeligt markeret Tuberkel, 
der imidlertid ganske savnedes hos det andet Exemplar. 
Hjerteregionen er sserdeles staerkt, pukkelformigt fremsprin- 
gende, dannende en umboformig Forheining i Midten af 
det bagre Parti af Rygskjoldet. Ogsaa den bagenfor lig- 
gende saakaldte Tarmregion er i Midten mere eller mindre 
tydeligt tuberkclformigt fremspringende. Paa enbver af de 
temmelig stserkt hvsslvede Gjelleregioner Andes fortil og bagtil 
et stumpt knudeformigt Eremspring, hvoraf det forreste er 
st0rst og noget affladet i Enden. Fra den ydre Side af 
disse Regional’ udspringer desuden en saerdeles stor konisk 
tilspidset Fortsats, der retter sig lige udad og betydelig 
overrager Rygskjoldets Sidekanter. En anden, men mindre 
og triangulsert tilspidset Fortsats sees i den forreste Del 
af Rygskjoldet, lnevende sig fra liver Leverregion og lige- 
ledes overragende Sidekanterne. Pallet af samtlige For- 
hpininger paa Rygskjoldets Overflade bliver saaledes, naar 
undtages den ovenfor naivnte lille, og som det synes in- 
constante Tuberkel fortil paa Maveregionen, ialt 13, 9 stumpe 
dorsale Knuder og 4 tilspidsede laterale Fortsatser. Paa 
de Muiulareaen til Siderne begnendsende saakaldte Ptervgo- 
stomialregioner bemserkes en noget uregelnuessigt buet Liengde- 
kjol, der viser et, som det synes, noget vexlende Antal af 
stumpe Knuder eller Crenulationer (se Fig. 2 og 3). 
Pandeliornet er af et meget ckaracteristiskt og fra 
vore pvrige bekjendte Former afvigende Udseende. Det er 
nemlig delt i to lige fra Roden af adskilte, fuldkommen 
lige og sylformigt tilspidsede Grene eller Horn, der diver- 
gere til liver Side og opnaar omtrent Halvparten af Ryg- 
skjoldets Lsengde. De er ved Roden fuldkommen cylindriske 
og afsmalnes jevnt mod Enden samt er tset kaarbesatte. 
Oienhulerne er temmelig smaa, men ganske tydeligt 
begrsendsede og rettede til Siderne. De begraendses oventil 
og fortil af en triangular!' tilspidset fortilrettet Flig, den 
saakalte Prseorbitaltorn og bagtil af en i Enden afstumpet 
Postorbitaltorn ; mellem begge er et dybt, i Bunden afrundet 
Indsnit eller Sinus. Den nedre Yseg af 0ienhulerne dannes 
vaesentlig kun af det med Epistomet forvoxne Basalled af 
2det Par Folere. 
Antennegrubernc, der som ssedvanligt er beliggende 
lige under Pandedelen (se Fig. 2), er af uregelmaessig oval 
Form og skilte i Midten ved en smal Skillevseg, bvis for- 
reste Del springer frem i Form af en buet Kam (se Fig. 3). 
Det brede, i Midten fordybede Brystskjold dsekkes 
hos Hunnen fuldstaendig af den paa Bugsiden omboiede 
Bagkrop. 
Of protuberances or tubercles, but a very limited 
number occur on the surface of the carapax, and as usual 
disposed with rigid symmetry. On the gastric region, ex- 
ceedingly convex, is observed in the middle, posteriorly, an 
obtuse prominence, and on either side a smaller, but dis- 
tinctly defined, rounded tubercle. Moreover, in one of the 
two specimens examined was detected on the median line, 
farther forward, a minute but well marked protuberance, 
of which however there was no trace in the other example. 
The cardiac region, considerably projecting, constitutes an 
umbo-shaped prominence, in the middle of the posterior 
part of the carapax. The so-called intestinal region, located 
posterior to the cardiac, is likewise in the middle more or 
less protuberant and projecting. On each of the compara- 
tively arcuate branchial regions occurs, alike anteriorly and 
posteriorly, an obtuse tuberculiform projection, of which 
the anterior is the larger and somewhat applanated at the 
top. Moreover, from the outer side of these regions issues 
a very large acuminate projection, turned directly outward, 
and extending considerably beyond the lateral margins of 
the carapax. Another, but smaller and triangular-acumi- 
nate process is seen on the foremost part of the carapax. 
rising from each hepatic region, and in like manner pro- 
jecting beyond the lateral margins. Hence, the number of 
prominences occuring on the surface of the carapax, if we 
except the minute and apparently inconstant tubercle ob- 
served, as stated above, on the anterior part of the gastric 
region, is 13, viz. 9 obtuse dorsal protuberances and 4 acu- 
minate lateral projections. On the so-called pterygostominl 
regions, laterally adjoining the buccal area, occurs a some- 
what irregularly arched longitudinal carina, exhibiting, it 
would seem, a slightly varying number of obtuse tubercles 
or crenulations (see figs. 2, 3). 
The rostrum is highly characteristic, differing widely 
in appearance from that in any other of our known forms. 
It is divided from the base upwards into two perfectly straight, 
awl-shaped branches or horns, diverging to either side, and 
which attain about half the length of the carapax. At the 
base they are perfectly cylindrical, tapering gradually towards 
the extremity, and have a thick covering of hair. 
The orbita are rather small, but distinctly defined, 
and turned sideways. Above and in front, they are bounded 
by a triangular-acuminate lobule, pointing anteriorly, the 
so-called preorbital spine, and behind by a postorbital 
spine, obtuse at the extremity; between the two extends a 
deep incision or sinus, rounded at the bottom. The lower 
wall of the orbita is formed in greater part by the basal 
segment (connate with the epistome) of the 2nd pair of 
antenna 1 . 
The antennal fovea 1 , placed as usual immediately be- 
neath the frontal region (see fig. 2), have an irregular oval 
form, and are separated in the middle by a narrow ridge, 
of which the anterior part projects in the shape of an 
arched, comb (see fig. 3). 
The broad sternum, hollowed in the middle, is in the 
females wholly covered by the inflexed abdomen. 
