46 
cylindrisk, lain lidet afsmalnende bagtil og liar sidste Seg- 
ment betydelig lsengere end de foregaaende. 
Rygskjoldet er forholdsvis stort, ligesom opsvulmet og 
neppe nnerkeligt indknebet i sit forreste Parti. Det dseklter 
nsesten fuldstaendigt Forkroppen, kun ladende en ubetvdelig 
Del af sidste Segment oventil frit. Dets forreste Rand er 
1 Midten stserkt iidbuet, dannende en bredt afrundet Pande- 
plade, der delvis dsekker Roden af 0inene; den bageste 
Rand er oventil kun ganske svagt udrandet. Oervicalfuren 
er skarpt og tydeligt markeret, og den foran samme belig- 
gende Del af Rygskjoldet er ovenfra seet kjendeligt bredere 
end Bagkroppen. 
Oinene (se Fig. 2) er meget smaa og ufuldkommet 
udviklede samt rager ilcke som ssedvanligt ud over Ryg- 
skjoldets Sider. Af Form er de kort psereformige og noget 
affladede, med den pigmenterte Del oventil kun indtagende 
den alleryderste Randzone. Pigmcntet er som bos de qvrige 
Arter af Slsegten smukt lyserpdt. Derimod er Facetteringen 
kun lidet tydelig. 
lste Par Foleres Skaft (ibid.) er af den ssedvanlige 
Bygning og omtrent af samme Lsengde som den foran Cer- 
vicalfnren beliggende Del af Rygskjoldet. Svpbernes Liengde 
kan ikke npiere bestemmes, da deres ydre Del paa det 
nmlersogte Exemplar var afbrukket. 
2det Par Fpleres Blad (ibid.) er forholdsvis af ikke 
ub e ty de 1 i g St or r else , na'sten 1 j i lsengere end lste Pars Skaft 
og af aflang lineicr Form, med den ydre Kant ganske glat 
og lige samt fortil endende med ot lidet tandforinigt Frem- 
spring. den indrc svagt buet og Enden meget ski’aat af- 
skaaren i Retningcn indenfra udad. Langs den inclre Kant 
og Spidsen er fmstet et temmelig betydeligt Antal af lange 
Fjserb0rster. 
Fodderne er af den for nservserende Slfegt characteri- 
stiske spinkle, traaddannede Form. Kun enkelte af dem var 
endnu i Behold paa det undersqgte Exemplar, og disse viste 
en lignende stserkt forlsenget Form som bos E. ahyssorum, 
idet det ydre Parti (Fig. 3) var sserdeles langt og tyndt, 
med de 2 sidste Led 'tilsammen neppe overstigende Vs M 
det foregaaendes Lsengde. 
iEggeposen eller Marsupium jvar paa det undersqgte 
Individ meget stor og fyldt med nsesten fuldt udviklede Unger. 
Det midterste Halevedhseng (se Fig. 4) viser det for 
Slaigten cbaracteristiske Udseende. Det er ganske kort, 
neppe lsengere end bredt og bserer paa den nsesten lige af- 
skaarne Enderand 4 omtrent lige lange Torner og i Midten 
2 fint cilierede Burster. 
De ydre Halevedhseng (ibid) har sserdeles smale og 
forlaengede, lancetformige Endeplader, begge rundt om be- 
satte med lange Fjserbprster. Den ydre er omtrent 1 / 4 
lsengere end den indre, der ved Basis viser det ssedvanlige 
Horeapparat. 
Hele Dyrets Legeine var i frisk Tilstand i hoi Grad 
gjennemsigtigt og nsesten uden nogen Pigmentering, saa at 
of the genus, very slender, cylindric, tapering but little 
posteriorly, and has the terminal segment much longer than 
any of those preceding it. 
The carapax is comparatively large, as it were swollen, 
and well-nigh imperceptibly constricted in its anterior part. 
It covers almost the whole of the cephalo-thorax, leaving 
but a very small portion of the last segment uncovered 
above. Its anterior margin is considerably arcuate, forming 
a broad, rounded frontal plate, which partially covers the 
base of the eyes ; the posterior margin is but slightly emar- 
ginate above. The cervical groove is sharply and distinctly 
marked, and the portion of the carapax lying anterior to 
it has, when viewed from above, a diameter perceptibly ex- 
ceeding that of the posterior division of the body. 
The eyes (see fig. 2) are exceedingly small and imper- 
fectly developed, and, contrary to what is usually the case, 
do not project over the sides of the carapax. In shape, 
they are abrupt-pyriform and somewhat applanated, with 
the cornea occupying, above, only the outermost marginal 
zone. The pigment, as in the other species of the genus, 
is a beautiful light-red. On the other hand, the areolar 
structure of the cornea is anything but distinct. 
The peduncle of the 1st pair of antennae (ibid.) has 
the usual structure, and well-nigh the same length as the portion 
of the carapax placed anterior to the cervical groove. The 
length of the flagella cannot be accurately given, their outer 
part in the specimen examined having been broken off. 
The scale of the 2nd pair of antennae (ibid.) is 
comparatively large, almost one-third longer than the ped- 
uncle of the 1st pair, and oblongo-lincar in form, with the 
outer margin quite smooth and straight and terminating 
anteriorly in a small dentiform projection; the inner margin 
is slightly arched, and has the extremity very obliquely 
truncate, from within to without. Along the inner margin, 
and at the point, are attached a considerable number of 
long, plumose bristles. 
The legs exhibit the slender, filiform appearance charac- 
teristic of the present genus. A few only were left in the 
specimen examined, and these had a very elongated form, 
similar to that in E. abyssorum, the outer portion (fig. 3) 
being extremely long and slender, with the two last joints, 
taken together, scarcely exceeding by one-third the preced- 
ing articulation in length. 
The incubatory pouch, or marsupium, was very large in 
the specimen examined, and full of almost mature young. 
The telson (see fig. 4) exhibits the appearance charac- 
teristic of the genus. It is quite short, scarcely longer than 
broad, and has on the well-nigh truncate terminal margin 
4 long spines, about equal in length, and in the middle 2 
delicately ciliated bristles. 
The outer caudal appendages (ibid.) have 2 exceedingly 
narrow and prolonged, lanceolate terminal plates, both beset 
round the edges with long, plumose bristles. The outer 
plate is about one-fourth longer than the inner, which ex- 
hibits at the base the usual auditory apparatus. 
The whole body of the animal, in a fresh state, was 
well-nigh translucent, and scarcely at all pigmented, so that 
