Beskrivelse af Hunnen. Legemet er (se PI. YIT. 
Fig. 17 og 18) af snial og langstrakt Form, omtrent 7 
Gauge lsengere end bredt. og bar Segmenterne vel begrsend- 
sede red laterale Indsnoringer. 
Integumeuterne er tyndere end lios den i det fore- 
gaaende omtalte Tanaide og hos enkelte Exemplarer lialvt 
gjennemsigtige. 
Hovedskjoldet er betydelig lsengere end bredt og i sin 
forreste Del temmelig stajrkt afsmalnende. med nsesten lige 
afskaaret Panderand og uden-Spor af 0ine oiler fi a Hoved- 
skjoldet adskilte 0ienlober. 
Af Forkroppens Segmenter er det sidste kortest ; nrnst- 
sidste og lste omtrent ligestore og noget mindre end de 3 
pvrige. der lain er ubetydelig bredere end lange. 
Bagkroppen indtager omtrent 1 j i af Totallmngden og 
er af samme Brede som Forkroppen. Dens sidste Segment 
er forholdsvis kort og i Enden stumpt tilrundet samt riser 
nedad noget foran Halevedhaeugenes Insertion til liver Side 
et lidet tandformigt Fremspring (ikke antydet paa Figuren)* 
lste Par Fplere er noget kortere end Hovedskjoldet 
og riser den for Slsegten ssedranlige Bygning. De bestaar 
af 4 mod Enden stserkt afsmalnende Led, bvoraf det lste 
er storst og af samme Lamgde som de orrige tilsammen. 
Hos et af de erholdte Exemplarer. der tilfieldigvis udralgtes 
til Dissection, viste disse Kolere (se Fig. 19) den Anomali. 
at sidste Led rar delt i 2 tydelige Segmenter. hrorved disse 
Folere her blev 5-leddede. .7 eg antager. at dette Exemplar 
bar rairet en endnu ikke fuldt udviklet Han. bos lirem den 
yderligere Segmentering af disse Organer netop rar paabe- 
gyndt. Ved en Feiltagelse er Fqlerne ogsaa paa det Fig. 
17 og 18 afbildede Exemplar, der var en fuldt udviklet 
Hun. fremstillede som 5-leddede. Dette er urigtigt. De 
var her. som jeg senere bar orerberist mig om. som smd- 
vanlig, 4-leddede. 
2det Par Folere (Fig. 20) er betydelig baade kortere 
og tyndere end 1 ste Par og bar de 2 midterste Led noget, 
skjondt ikke meget lsengere end de ovrige. Yed Spidsen 
baerer disse Folere ligesora lste Par et Knippe af simple 
Borster. 
Kindbakkerne (Fig. 21) er som hos alle til denne 
Shegt borende Arter ualmindelig smaa og svagt byggede. 
Selve Corpus er meget kort samt ufuldstendigt incrusteret. 
og den mod Munden rettede indre Ende smalt udtrukket 
og jevnt indadboiet; paa beire Kindbakke er den bersebnet 
med 2 smaa simple Tamder. paa venstre desuden med en 
secundser pladefonnig Fortsats. Tvggeknuden bar den ussed- 
vanlige Form af en simpel tilspidset. noget bagudkrummet 
Flig af kun lidet fast Consistens og uden Spor af den ssed- 
vanlige riflede Skulptur. 
lste Par Kjserer (Fig. 22) bar som hos andre Tanai- 
der kun en enkelt smalt lineser Tyggelap, der paa Spidsen 
er bevsebnet med talrige dirergerende Torner. Den bag- 
80 
Description of the Female. — The body (see PI. 
VII. figs. 17. 18) is slender and elongate in form, about 
7 times longer than broad, and has the segments well defined 
by lateral instrictions. 
The integuments are thinner than in the preceding 
Tanaid. and in some specimens semi-diaphanous. 
The cephalic shield is considerably longer than broad, 
and tapers somewhat rapidly throughout its anterior portion ; 
the frontal margin abruptly truncate, without any trace of 
eyes, or of ocular lobes separated from the cephalic shield. 
Of the segments belonging to the anterior division, 
the last is shortest; the penultimate and the 1st about equal 
in size, and a trifle smaller than the 3 others, which are 
but very little broader than long. 
The posterior division of the body, measuring about 
one-fourth of the total length, is of the same breadth as 
the anterior. Its terminal segment is comparatively short, 
and obtusely rounded at the extremity; moreover, it exhibits, 
downward, a little anterior to the insertion of the caudal 
appendages, on either side, a small dentiform projection 
(not represented in the Figure). 
The 1st pair of antennas are somewhat shorter than 
the cephalic shield, and have the structure characteristic 
of the genus. They consist of 4 joints, rapidly tapering 
toward the extremity, of which the 1st is largest, and 
equal in length to the others taken together. In one of 
the specimens that chanced to be selected for dissection, 
these antenna? (see fig. 19) exhibited the anomaly of the 
terminal joint being divided into 2 distinct segments; and 
hence the said antennae are five-jointed. In my judgment, 
this specimen must have been a male not fully developed, 
in which the segmentation of the organs in question bad 
only just commenced. The antennae of the specimen — a 
fully developed female — represented in figs. 17 and 18, 
are also erroneously shown as five-jointed. They were, 
in this specimen too, as I have subsequently been enabled 
to determine, as usual four-jointed. 
The 2nd pair of antennae (fig. 20) are considerably 
shorter and more slender than the 1st pair, and have the 
2 middle joints a trifle longer than the rest. At the point, 
these antennae bear, as do the 1st pair, a fascicle of simple 
bristles. 
The mandibles (fig. 21) are, as in all the species be- 
longing to this genus, remarkably small and feeble in struc- 
ture. The corpus itself is exceedingly short and imperfectly 
incrusted, and the inner extremity directed toward the 
mouth, slenderly produced and uniformly incurved; on the 
right mandible it has 2 small, simple teeth; on the left, 
also a secondary, lamelliform projection. The molar protu- 
berance exhibits the very unusual form of a simple, acute, 
somewhat posteriorly curving lobule, anything but firm 
in consistence, and without a trace of the usual tinted 
sculpturing. 
The 1st pair of maxillae (fig. 22) are provided, as in 
other Tanaids. with only a single narrow, linear masticatory 
lobe, armed at the point with numerous diverging spines. 
