197 
en <l dot foregaaende, Endekloen kort, lancetformig. Sidste 
^ ar Halef'odder mod starlet forlsengede lancetformige og 
barstebesatto Grene. Haloved liaaiget smalt, klavet til 
ftoden. Farven hvidagtig. Lamgden 23™. 
Findested. Stat. 147. 
Bomserkningor. Donne Art er let kjendelig fra de 
° v rige bekjendte ved den totale Mangel af 0inc og ved 
det eiendonunelige tandformige Fremspring paa de 3 for- 
1(1 ste Par Epimerer, bvilket bar givet Anledning til Arts- 
denaevnelsen. Den harer til de stprre Arter af Skegten 
bgner i sin ydre Habitus mest A. spinipes Boeek. 
Beskrivelse. Legemet er (se PL XYI, Fig. 4) stserkt 
Sa| nnientrykt fra Siderne og temmelig hefit, dog med rund 
^78 og uden dorsale Fortsatser. 
Hovedet er omtrent saa langt som de 3 forreste Seg- 
“lenter tilsammen og viser oventil en tydelig skarp Kjpl, 
c ^ er lidt ofter lidt tabor sig mod den bagre Rand. Pande- 
^ ( 'len on- noget fremspringende og stumpt tilrundet, uden 
fydeligg laterale Hjorner. 
De 3 forreste Par Epimerer er sniale og skraat for- 
bhettede samt udmserkede derved, at deres nedre bagre 
Djorne er udtrukket i et lidot, men tydeligt tandformigt 
‘einspring, 4de Par er betydelig storre end de foregaa- 
* "do, nedentil smalt tilrundet uden tandformigt Fremspring, 
111011 111 ed et skarpt Hjorne bagtil ovenfor Midten. Alle 4 
1 1 i den nedre Kant tret besatte med cilierede Burster. De 
d bagre Par er meget smaa og utydeligt tvelappede. 
3die Bagkropssegments Sideplader ender bagtil i et 
Boston retvinklet Hjorne. Det folgende Segment er ovntil 
s Lerkt hvselvet, dog uden nogen egentlig Pukkel. 
Af 0ine var intetsomhelst Spor at opdage bos de 
lls kt indl'angede Exemplarer. 
Eolerne er tynde og spinkle samt ulige udviklede. 
Par er ikke fuldt af Legemets halve Lrengde og bar 
kaftets Iste Led temmelig kort, hvorimod 2det Led er 
s f 0 erkt forlsenget og smalt. 3die Led er som ssedvanlig 
1>le get lidot og fast forbundet med Svoben. Denne sidste 
01 omtrent dobbelt saa lang som Skaftet og sainmensat af 
'"okring 20 Led. 2det Par er betydelig storre end lste 
uiesten af hole Legemets Laengde. Af Skaftets Led er 
11,1 do 3 yderste udvendigt synlige. Det lste af disse 
1 a § er fortil ud over Hovedets Spids; nsestsidste Led er 
s Lerkt forkenget og af smal eylindrisk Form; sidste Led 
''°get kortere; Svoben forlsenget, traadformig, med lange 
0rs ter i begge Kanter. 
reaching almost to end of 3rd joint; last joint longei and 
more slender than preceding, terminal claw short, lanceo- 
late. Last pair of caudal stylets with greatly produced, 
lanceolate, and densely bristle-beset branches. Telson nar- 
row, cleft to base. Colour whitish. Length 24”“. 
Locality. — Stat. 147. 
Remarks. — This animal may readily be distinguished 
from the other known forms by its total want of eyes and 
the peculiar dentiform projection on each of the 3 anterior 
pairs of epimera, a character that suggested the specific 
designation. It ranks among the larger species of the 
genus, presenting in its outer habitus closest resemblance 
to A. spinipes Boock. 
Description. — The body (see PI. XYI, fig. 4) is 
greatly compressed from the sides, and rather high, though 
with a round back and no dorsal projections. 
The head about equals in length the 3 anterior seg- 
ments taken together, and exhibits above a distinct, sharply 
defined keel, that gradually disappears towards the posterior 
margin. The frontal portion projects to a slight extent, 
and is obtusely rounded, without distinct lateral corners. 
The 3 anterior pairs of epimera are slender, and 
directed obliquely forward, as also distinguished by their 
lower posterior corner being drawn out to a small, but dis- 
tinct dentiform projection. The 4th pair are considerably 
larger than the preceding pairs, slenderly rounded off below 
without any dentiform projection, but having posteriorly, 
above the middle, a sharp corner. The 4 pairs are all, 
along the lower margin, densely beset with ciliated bristles. 
Tfi e 3 posterior pairs are very small and indistinctly bi- 
lobular. 
The lateral plates of the 3rd abdominal segment ter- 
minate posteriorly in a well-nigh rectangular corner. The 
succeeding segment is very prominently arched above, though 
without, in a strict sense, exhibiting any hunched pro- 
tuberance. 
Of eyes, not a trace could be detected in the recently 
taken specimens. 
The antennae are thin and slender, and unequally de- 
veloped. The 1st pair do not attain quite half the length 
of the body, and have the 1st joint of the peduncle rather 
short whereas the 2nd joint occurs exceedingly elongate 
and slender; the 3rd is, as usual, very small, and firmly 
connected with the flagellum; the latter about equals the 
peduncle in length, and has close upon 20 articulations. 
The 2nd pair are considerably larger than the 1st, and 
attain well-nigh the whole length of the body. Of the 
joints of the peduncle, only the outermost 3 are visible ex- 
ternally. The first of these juts out beyond the point of 
the head; the penultimate joint is very considerably elongate 
and slender-cylindric in form, the last a trifle shorter; the 
flagellum — filiform — is produced, with long bristles on 
both margins. 
