36 
JBagkroppen stserkt afsmalnexxde, oventil jevnt hvselvet. 0i- 
nene smaa og ufuldkomment udviklede. Iste Par Folere 
faestede ovenover 2det Par, med kort og tykt Skaft og 2 
stserkt forlaengede Svober; 2det Par forsynet ined et vel 
udviklet Blad og en overordentlig lang. traadformig Svobe. 
Kindbakkerne kraftigt udviklede med den indre Ende plade- 
formigt udvidet og i Kan ten tint saugtakket; en liden, men 
tydelig 3-leddet Palpe tilstcde. Kjseverne og de forste Par 
Kjsevefodder af en lignende Bygning som bos de typiske 
Carider. 3die Par Kjsevefpdder stserkt forlsengede, forsynede 
ved Basis med en vel udviklet Exognath og en supplemen- 
tser Gjelle ; det yderste Led sylformigt tilspidset, uden Torner. 
Alle F odder forsynede med vel udviklede Svpmmegrene, de 
2 forreste Par kortere end de 0vrige, med smaa Saxe, de 
2 folgende Par tynde og spinkle med stserkt forlsenget 
Endeklo, sidste Par noget uligt de 2 foregaaende, med sser- 
deles kox*t og rudimentser Endeklo. Gjellerne paa bver Side, 
iberegnet den supplementsere Gjelle paa 3die Par Kjseve- 
fpdder, 10, ordnede i en dobbelt Rad. Bagkroppens Svom- 
mevedhseng kraftigt udviklede med lancetformige Endeplader. 
Det midterste Halevedhseng stserkt forlsenget, med den ydre 
Del smalt udtrukken og Spidsen bevsebnet med divergerende 
Torner. De ydre Halevedbseng kortere end det midterste, 
med den ydre Plade lsengst, af atlang Form og uden nogen 
Tvsersutur ved Enden. 
Almindelige Bemserkninger.' Den Form, hvorpaa 
denne nye Slsegt er grundet, viser vistnok i visse Henseen- 
der nogen Overensstemmelse med Slsegten Pasiphae Savigny, 
bvortil den af Buckholz er henfort, men frembyder dog paa 
den anden Side saa mange characteristisko Eiendommelig- 
heder, at jeg finder det absolut nodvendigt at betragte den 
som Typen for en distinct Slsegt, der neppe engang vil 
kunne forenes med Pasiphae under en Familie. 
Med Slsegten Pasiphae stemmer den vsesentlig kun 
overens derved, at de 2 forreste Fodpar er forsynede med 
Saxe og at alle Fodpar bar en Svommegren (Exopodit) ; men 
denne Sv0mmegren er her langt kraftigere udviklet end bos 
bin Slsegt, hvor den har mere TJdseende af et rudimentsert 
Appendix. Ligeledes er de 2 forreste Fodpar betydelig 
mindre, medens de 3 f0lgende, der hos Pasiphae er smaa 
og svage, her er vel udviklede. Fra Slsegten Pasiphae skiller 
den sig endvidnre ved den mere underssetsige, nsesten trinde 
Kropsform, de ualmindelig tynde, membranpse Integumenter, 
0inenes rudimentsere Beskaffenbed, Munddelenes meget ulige 
Bygning samt Halevedhsengenes eiendommelige Form. 
Efter min Mening slutter den her omhandlede Form sig 
nsermere til den af Roux opstillede og ialmindeligbed til 
Peneiderne henfprte middelhavske Slsegt Ephyra, bos hvem 
de 2 forreste Fodpar lige^om hos nservaxrende Form er 
kortere end de folgende og forsynede med smaa Saxe. 
Men ogsaa de 2 bei’ben borende Arter synes i visse Heix- 
seender at skille sig saameget, at det heller ikke vel lader 
sig gjorc at benfpre vox* Forxn til denne Slsegt. 
Posterior division of body rapidly tapering; above, uni- 
formly arched. Fix*st pair of antenna* attached above 
second pair, with a short and thick pedxxncle and 2 very 
coxxsiderably produced flagella ; second pair furnished with a 
well-developed scale axxd a rexnax-kably long, filiform flagel- 
lum. Mandibles powerfully developed, with the inner ex- 
tremity lamelliforix; dilated, axxd, along the margin, delicately 
serrate; a small, bxxt distinctly three-jointed palp present. 
Maxillae and first pairs of xnaxillipeds exhibiting a sixnilar 
structure to that characterizing those parts in the typical 
Caridians. Third pair of xnaxillipeds greatly produced, 
furnished at the base with a well-developed exognatli and 
a supplementary branchia; outer joint awl-shaped, and 
Avithout spines. All of the legs provided with well-developed 
natatory branches, the 2 foremost pairs shorter than the 
rest, with small chelae, the 2 succeedixxg pairs thin and 
slender, with a greatly produced terminal claw, last pair 
somewhat unlike the 2 preceding pairs, xvitb an exceedingly 
short and rudimentary terminal claw. Number of branchiae 
on either side, including the supplementary branchia on 3rd 
pair of xnaxillipeds, 10, arranged in a double series. Pleo- 
poda powerfully developed, with lanceolate tei’xxxinal plates. 
Telsoxx greatly prolonged, with the exterior portion drawn 
slenderly oxxt, and the point armed with diverging spiixes. 
Outer caxxdal appendages shorter than telson, with the ex- 
terior plate longest, of oblong form, and without any 
transverse sutixre at the extremity. 
General Remarks. — The. forixx oxx which this new genus 
is based, does indeed, in certain respects, exhibit soixxe agree- 
ment Avith the genus Pasiphae Savigny, to Avhich Buckholz 
has referred it, bxxt, on the other hand, has so maixy charac- 
teristic peculiarities, that, in xxxy judgment, it is absolutely 
necessary to regal’d the animal as the type of a distixxct 
genus, hardly even to be xxnited with Pasiphae under one 
family. 
With the genus Pasiphae, its chief agreement consists 
simply in the 2 foremost pairs of feet being furnished with 
chelae, and in all of the pairs having a natatory branch (ex- 
opodite); but this branch is far nxore poAvex’fully developed 
than in the fox*mer genxxs, Avhere it has merely the appearance 
of a rudimentary appendix. Moreover, the 2 foremost pairs 
of legs are considerably smaller*, whereas the 3 succeeding 
pairs, which in Pasiphae are small and feeble, exhibit a 
powerful development. From the genus Pasiphae, it also 
differs by reason of its comparatively nxore thickset, almost 
rounded, form of body, the unusually thin, membranaceous 
integumexxts, the rudimentary character of the eyes, the 
very different structure of the oral parts, and the peculiar 
fornx of the caudal appendages. 
In nxy judgment, the form iix question approximates 
more closely the Mediterranean genxxs Ephyra, established 
by Roxxx, and genei*ally referred to the Peneidse, in xvhich 
the 2 foremost pairs of legs, as in the present form, are 
shorter tlxaxx the succeeding, axxd furnished Avith small chelse. 
Bxxt the 2 species belonging to this genxxs Avould in certain 
respects also appear to differ so xnuch, that the form here 
treated of caxxnot be safely classed Avith them in the same genus. 
