104 
fundet paa en vidt adskilt Localitet nemlig i Smith Sound 
under 82° 27" Brede og lier i talrige Exemplarer, baade 
Hunner, Hanner og Unger. An-ten er herefter utvivlsomt 
ligesoin foregaaende at betragte som en a*gte arktisk Form. 
“Discovery,” in a widely different tract, viz. Smith's Sound, 
lat. 82° 27" N., and numerous specimens obtained, compris- 
ing males, females, and young. Hence the species must, 
in common with the preceding, lie regarded as a true 
Arctic form. 
22. Arcturus hystrix, G. 0. Snrs. n. sp. 
(PL IX, Pig. 23—26). 
22. Arcturus hystrix, G. 0. Sars, n. sp. 
(PI. IX, figs. 23 — 26) 
Arcturus hystrix, ft. O. Sars, Prodromus descriptionis Crust, etc-., No. 
Arcturus hystrix, (i. 0. Sars, Prodromus descriptionis Crust, etc.. No. 
73. 
Artscharaeteristik. Legemet hos Hunnen mesten 
tenformigt, tned talrige lange og spidse Tomer, dannende 
regelnnessige Tvterrader for hvert Segment. 4de Segment 
noget stone end de 0vrige og forsynet med 2 Tvaerrader 
af Tomer. 2det Bagkropsseginent ufuldstamdigt skilt fra 
Endesegmentet, med 2 stterke dorsale Tomer og store tri- 
anguhere Sidefortsatser. Endesegmentet veil Basis forsynet 
med 2 lignende laterale Fortsatser og oventil med en dob- 
belt ILckke af Tomer; Spidsen tvedelt. 0inene meget sinaa, 
runde, med sort Pigment. Iste Par Folere med Svoben 
smal, linemr og (hos Hunnen) kun forsynet med 3 Sandse- 
vedhseng. 2det Par Folere kortere end Legemet, med 
Skaftets Led i Enden tornede og Svoben kun sammensat 
af 3 simple Led. De 3 bagre Fodpar med en stferk Torn 
i Midten af Basalleddets bagre Kant, Farven lividagtig. 
Laengden 9”™. 
Findesteder. Stat, 18, 124, 164. 
Bemaerkninger. Nservmrende nnerkelige Form viser 
veil forste 0iekast et fra de 2 foregaaende Arter saa paafal- 
dende forskjelligt Udseendb, at man kuude vtere fristet til 
at se i den Typen for en belt anden Skegt. Jeg liar imid- 
lertid ved den anatomiske Undersogelse fuiidet, at den idet- 
hele slutter sig mer til disse, ialfald naarmere end den efter- 
folgende Form, og foretrtekker derfor indtil videre at hot i fore 
den til den typiske Skegt Arcturus. Som Oharacterer, tier 
maaske kunde komme i Betragtning ved en generisk Ad- 
skillelse skal jeg her blot ftufore den kun af 3 Led bestaa- 
ende Svobe paa 2det Par Folere og 2det Bagkropssegments 
Sammemoxning med Endesegmentet. 
Beskrivelse af Hunnen. Legemet er (se PI. IX. 
Fig. 23 og 24) af forholdsvis kort og underssetsig Form, 
med den storste Brede kjendelig stone end y 4 af Liengden. 
Det er paa Midten stierkt opsvulmet, mesten tenformigt, og 
jevnt afsmalnende mod begge Ender. Hvad der isa?r bi- 
ll rage r til at give denne Art sit eiendommeligt udpraegede 
1 dseende, er de hoie og skarpe Tomer, hvormed Legemet 
overalt er bevabnet og som stritter ud til alle Sider lige- 
Speciflc Character. — Body in female almost fusi- 
form, with numerous long and acute spines, constituting 
regular transverse series for each segment. Fourth seg- 
ment somewhat larger than the others, and furnished with 
2 transverse series of spines. Second abdominal segment 
incompletely separated from terminal segment, with 2 strong 
dorsal spines and large, triangular lateral projections. Termi- 
nal segment furnished at base with 2 similar lateral pro- 
jections, and, above, with a double row of spines; point 
bifurcate. Eyes very small, round, and provided with a 
black pigment. First pair of antenna? with flagellum slen- 
der, linear, and (in female) furnished with only 3 sensorv 
appendices. Second pair of antenme shorter than body, 
with the joints of the peduncle spiniferous at the extremity 
and the flagellum composed of only 3 simple joints. The 
three posterior pairs of legs with a strong spine springing 
from the middle of the posterior margin of the basal joint. 
Colour whitish. Length 9 mm . 
Locality. — Stats. 18, 124. 164. 
Remarks. — The present highly characteristic form 
exhibits at the first glance an appearance so strikingly 
divergent from the 2 preceding species, as to suggest its 
being the type of quite another genus. Meanwhile, the 
result of my anatomical examination has shown it, on the 
whole, to approximate those species closely, more so at 
least than is the case with the succeeding form ; and hence 
I prefer classing it at present under the typical genus 
Arcturus. As characters that might perhaps be assigned 
. generic value, 1 will merely call attention to the flagellum 
on the 1st pair of antenme consisting of but 3 joints, and 
the 2nd abdominal segment being connate 1 with the termi- 
nal segment. 
Description of the Female. — The body (see PI. 
IX, figs. 23, 24) is comparatively short and thickset in 
form, with its greatest breadth perceptibly exceeding one- 
fourth of the length. It is very tumid in the middle, al- 
most fusiform, and tapers gradually toward both extremi- 
ties. The character that more than any other contributes 
to give this species its peculiarly distinctive appearance, 
are tin 1 high and acute spines with which the body is 
