18 
Til hver Side af Pandehornet viser Rygskjoldets for- 
reste Kanter et kort afruudet Udsnit, hvorfra 0inene rager 
frem. Dette Udsnit, der danner et Slags ufuldkommen 
0ienkule, er udad begrsendset af en liden spids Tand, den 
saakaldte Extraorbitaltorn, 
Rygskjoldets Overflade er mellem Lamgdekjolerne ujevn, 
dannende Here mere eller mindre tydelige Tvservulster, hvoraf 
2 omtrent i Midten af Rygskjoldets Lamgde er mest frem- 
tnedende. Fra Roden af Pandehornet strsekker sig 2 noget 
buedc og bagtil divergerende opboiede Linier, der begraendser 
et mediant Felt fortil, svarende til Maveregionen hos Bra- 
chyurer og Anomurer. Bagtil bemserkes 2 andre, men 
mindre skarpt marlcerede Linier, der fra den bagerste dor- 
sale Fortsats lober bueformigt udad og fortil ovenfor Side- 
kjolerne og antyder den ovre Begrsendsning for Gjelleregio- 
nerne. Endelig sees nedenfor Sidekjolerne i det bagre Parti 
af Rygskjoldet (se Fig. 2) en noget fremspringende Lsengde- 
kant, hvorfra Sidefioiene boier sig stferkt indad mod Midt- 
linien eller ind under Forkroppen. Den trie Rand af Sidc- 
Hoiene er her besat med fine Haar. Rygskjoldets bagre 
Rand er oventil noget fortykket og meget svagt udrandet i 
Midten. 
Det mellem Fodderues Insertion beliggende Bryst- 
skjolcl (Fig. 22 og 23) er tydeligt udviklet og temmelig 
bredt bagtil samt ved tydelige Tvaersuturer delt i paa hin- 
anden folgende Segmenter. Det viser en triangular Form 
og har langs ad Midten en Kjol. der for hvert Segment 
gaar ud i en spids fortil rettet tornformig Fortsats. 
Bagkroppen (se Fig. 1 og 2), der omtrent er dobbelt 
saa lang som Forkroppen, er i sin forreste Del neppe sma- 
lere end denne, men aftager hurtigt i Brede bagtil. Den 
er forovrigt hos aegbcerende Hunner adskilligt bredere end 
hos Hannerne og ogsaa forsynet med dybere Epimerer. 
Rygftaden er stferkt hvmlvet og ligesom Rygskjoldet meget 
ujevn, med en mere eller mindre tydeligt udpneget Sculptur 
i Form af uregelmsessige Forhoininger og Fordvbninger. 
Langs ad Midten lober en skarpt markeret Kjol, der paa 
de so forreste Segmenter hsever sig til en hoi, sammentrykt 
Fortsats, omtrent af samme Beskaffenhed som Rygskjoldets 
Torner. Paa de 3 folgende Segmenter er derimod Ryg- 
kjolen ganske jevn, og paa sidste Segment Andes oventil 2 
parallele Kjoler, der begrsendser et canalformigt fordybet | 
Parti i Midten; enhver af de sidstnmvnte Kjoler danner i 
den bagerste Del to paa hinanden folgende bagudrettede 
tandformige Fremspring. 
De to forreste Segmenter er oventil betydelig kortere 
end de Ovrige og skilte ved storre, hudagtige Mellemrum, 
hvorfor ogsaa Bevsegeligheden mellem disse Segmenter er 
temmelig stor. 
Epimercrne er navnlig hos de mgbaerende Hunner 
(se Fig. 2) temmelig store, pladeformige og i Kanterne tint 
cilierede. Paa lste Segment er de dybest og danner i 
Midten af den forreste Kant et lidet tandformigt Freni- 
spring, der moder Sidekjolerne paa Rygskjoldet, medens de 
On either side of the rostrum, the anterior margins 
of the carapax exhibit a short, rounded immargination, from 
which the eyes project. This immargination, which con- 
stitutes, as it were, a kind of imperfect orbita, is limited 
exteriorly by a small acute tooth, — the so-called extra- 
orbital spine. 
The surface of the carapax is somewhat uneven be- 
tween the longitudinal caringe, constituting several more or 
less distinct transverse protuberances, 2 of which, located 
about in the middle of the longitudinal diameter of the carapax, 
are most prominent. From the base of the rostrum, extend 
2 somewhat arcuate and posteriorly diverging, elevated lines, 
which anteriorly mai*k off a median area, corresponding to the 
gastric region in the Brachyura and Anomura. Posteriorly are 
observed 2 other, but less sharply marked lines, which, from the 
posterior dorsal projection, extend in a curve, outward and 
forward, above the lateral carimo. and indicate the upper limit 
of the branchial regions. Finally, is seen beneath the lateral 
carinse, on the posterior portion of the carapax (fig. 2), a 
somewhat projecting longitudinal border, from which the 
lateral lobes bend considerably inward towards the median 
line, or in under the ventral face of the body. The free 
margin of the lateral lobes is here finely ciliated. The 
posterior margin of the carapax, above, is somewhat incras- 
sated and very slightly immarginated in the middle. 
The sternum, located between the origin of the legs 
(figs. 22, 23) is distinctly developed and posteriorly rather 
broad, as also, by distinct transverse sutures, divided into 
a series of segments. It has a triangular form and exhibits 
along the middle a carina, which, at each segment, is produ- 
ced into an acute, anteriorly directed, spiniform apophysis. 
The posterior division of the body (figs. i. 2), about 
twice as long as the anterior, has its foremost part scarcely 
at all narrower than the latter, but diminishes rapidly in 
breadth posteriorly. For the rest, in ovigerous females it 
is considerably broader than in males, and also provided 
with deeper epimera. The dorsal surface is exceedingly 
arcuate, and, like the carapax, very uneven, with more or 
less distinctly marked sculpturing, in the form of irregular 
elevations and depressions. Along the middle extends a 
sharply marked keel, which, on the two foremost segments, 
rises into a high, compressed process, much the same in 
character as the spines of the carapax. On the 3 following 
segments the dorsal carina is, however, quite even, and on 
the last segment occurs, above, 2 parallel carina;, which 
bound a canaliculated median area; each of the last-mentioned 
carinae form in their extreme hinder part two posteriorly 
directed dentiform projections. 
The tw r o foremost segments are considerably shorter 
above than the others, and separated one from the other 
by broad cutaneous spaces; hence the mobility between 
these segments is very considerable. 
The epimera, particularly in ovigerous females (fig. 2), 
are rather large, lamellar in shape, and along the margins 
finely ciliated. They are deepest on the 1st segment 
and exhibit in the middle of the foremost margin a small 
dentiform projection, which meets the lateral carinse on the 
