28 
betydelige Stprrelse og pragtfulde Farve, yed ' de smaa, 
ufuldkomment udviklede og lyst pigmenterede 0ine, de over- 
ordentlig brede Antenneblade og den stserkt forlsengede 
indre Svobe paa Iste Par Folere. I de fleste pvrige Punkter 
viser den sserdeles stor Lighed med folgende Art. 
Beskrivelse. Legemets Form er (se Fig. 1 og 2), 
sammenlignet med de egentlige Hippolyter, temmelig slank 
og noget sammentrykt fra Siderne. Den ligner i denne 
Henseende noget mere samme lios Arterne af den nserstaa- 
ende Slsegt Virbius Stimpson. Dog synes Forkroppen paa 
Grand af det lidet udviklede Pandeborn ussedvanlig kort i 
Forhold til Bagkroppen. 
Rygskjoldet er oventil temmelig stserkt hvselvet, med 
Hoidon betydelig storre end Breden og den ovre Contour 
fortil noget bueformigt boiet. I den forreste Del bemserkes 
en tydelig, men ganske kort median Lsengdekjol, der er 
bevaebnet med en enkelt liden fortilrettet Tand. Foran 
denne Kjol skyder frem i horizontal Retning en i Midten 
noget fordybet trekantet Pandeplade. der livajlver sig over 
0inenes Insertion og til liver Side er begrsendset ved en 
tydelig markeret Kant. Den gaar fortil ud i 3 spidse 
Tsender, hvoraf de 2 yderste og lcorteste egentlig forestiller 
de ussedvanlig stserkt udviklede Supraorbitaltorner, medens 
den midterste, spidst udtrukne og ud over 0inenes Ender 
ragende Tand er det rudimcntsere Pandeborn. Den forreste 
Rand af Rygskjoldet viser nedenfor Pandepladen og lige 
over 2det Par Foleres Insertion en kort Antennaltorn bvor- 
fra en noget bugtet Linie strsekker sig bagtil og antyder 
et Slags Begrsendsning mellem Mave- og Leverregionen. 
Lsengere nede og noget fjernet fra Randen findes en spids 
saakaldt Hepaticaltorn, der fortssetter sig bagtil i en kort 
Kjol. De nedre forreste Hjoruer af Rygskjoldet er deri- 
mod simpelt tilrundede uden noget tandformigt Fremspring, 
og de nedre Kanter er i liele sin Lsengde jevnt bueformigt 
boiede. Rygskjoldets bagre Rand er oventil noget forty kket 
og ganske svagt udrandet i Midten. De afrundede Side- 
floier dsekkes for en Del af lste Bagkropssegments Epimerer 
(se Fig. 2). 
Bagkroppen er meget kraftigt udviklet og mere end 
dobbelt saa lang som Rygskjoldet. Af dens Segmenter er 
de to forreste som ssedvanligt oventil ganske korte og ad- 
skilte ved storre huclagtige Mellemrnm. 3die Segment er 
som bos Hippolyterne oventil stserkt pukkelformigt frem- 
springende og gaar bagtil i Midten ud i en triangular noget 
nedad boiet Fortsats. De 3 bagerste Segmenter aftager 
hurtigt saavel i Hoide som i Brede, og sidste Segment er 
meget smalt og nasten cylindriskt. Epimererne paa de 3 
forreste Segmenter er bos de agbarende Hunner sserdeles 
store og brede; navnlig udmmrker sig i denne Henseende 
2det Segments Epimerer, som danner sserdeles brede, ellip- 
tiske, udad convexe Plader, hvis Sidedele for en stor Del 
dakker saavel det foregaaende som efterfolgende Epimer 
(se Fig. 2). Hos Hannerne er disse Epimerer dog for- 
distinguisbed from the other species of the genus by reason 
of the small, imperfectly developed, and faintly pigmented 
eyes, the remarkably broad antennal scales, and the greatly 
elongated inner flagellum on the 1st pair of antennae. In 
most other respects, it exhibits great resemblance to the 
following species. 
Description. — Form of body (see figs. 1, 2), as 
compared with that of the true Hippolytes, rather slender, 
and somewhat compressed from the sides. In this respect, 
the body has greater resemblance to that in the approxi- 
mating genus Virbius Stimpson. Meanwhile, the cephalo- 
thorax would appear, from the slight development of the 
rostrum, to be unusually short as compared with the ab- 
domen. 
The carapax rather arched above, with the height 
very considerably in excess of the breadth, and the upper 
contour somewhat projecting anteriorly. On the foremost part, 
may be observed a distinct, but. exceedingly short, median 
longitudinal carina, armed with a small, anteriorly directed 
tooth. In front of this keel protends horizontally, some- 
what depressed in the middle, a triangular frontal plate, 
arching over the insertion of the eyes, and on either 
side marked off by a well-defined border. Anteriorly, it 
branches out into 3 pointed teeth, of which the 2 outermost 
and shortest, strictly, represent the unusually developed 
supraorbital spines, whereas the median tooth, sharply pro- 
duced and jutting beyond the extremities of the eyes, is 
the rudimentary rostrum. On the foremost margin of the 
carapax, below the frontal plate and immediately above the 
insertion of the 2nd pair of antenna', is seen a short an- 
tennal spine, whence a somewhat curved line extends poste- 
riorly, indicating a kind of demarcation between the gastric 
and hepatic regions. Farther down, and at some distance 
from the margin, occurs a pointed, so-called hepatic spine, 
continued posteriorly as a short carina. The antero-lateral 
corners of the carapax are, on the other hand, simply 
rounded, without any dentiform projection, and the lower 
margins, throughout their entire length, uniformly arched. 
Above, the posterior margin of the carapax is somewhat 
incrassated, and very slightly emarginate in the middle. 
The rounded lateral wings are partially overlapped by the 
1st segment of the abdomen (see fig. 2). 
The posterior division of the body is very strongly 
developed, and more than twice the length of the carapax. 
Of its segments, the two foremost are, as usual, quite short 
above, and separated from each other by wide membranous 
spaces. As in the Hippolytes, the 3rd segment projects 
above, prominently hunched, extending posteriorly along 
the middle as a triangular, somewhat downward deflected 
prolation. The 3 hindmost segments diminish rapidly alike 
in height and in breadth, and the last segment is exceedingly 
narrow, and almost cylindrical. On the 3 foremost segments, 
the epimera in the ovigerous females are exceedingly large 
and broad; this is more particularly the case with the 
epimera of the 2nd segment, which constitute remarkably 
broad, elliptic, externally convex plates, whereof the lateral 
parts to a great extent overlap alike the preceding and the 
