79 
tlesto af disse or i'orst opdagede af Prof. LiUjeberg ved 
Bohuslau og Gorges Vcstkyst. Slaegten er forevrigt ogsaa 
i'opraesenteret i Middelhavet og ved Nordamerikas 0stkyst. 
Alio dens Arter synes at vaere segte Dybvandsformer, og 
don tuldstaendige Mangel af 0ine synes at staa i god Sam- 
klang hermed. 
15. Leptognathia longiremis, (Lilljeborg). 
(J’l. Vll, Fig. 17—28). 
Tnnni * longiremis, Lilljeborg, Bidrag til Kundskab oiu de inom Sverige 
°ch Norrige fbrekomande Orustaceer af Tanaidernas imderfamilj 
No. 7. 
Jnnms islandicus, G. (). S argi Prodromus descriptionis Crust, etc., 
No. (i|. 
‘ e l‘t°gnathia longiremis, G. O. Sars. Revision af Gruppen Isopoda cheli- 
fera pg. 4 1 . 
Arts char act eristik. $ Legemet af sinal linear Form, 
med den sterste Brede nepe mere end 1 j 1 af Lmngden. 
o\odskjoldet betydelig lamgere end bredt, i sin forreste 
^ a ismalnende, med lige afskaaret Panderand. Bagkrop- 
j ,Ul samme Brede som Forkroppen, sidste Segment ior- 
aoidsvis kort, med et lidet tandformigt Fremspring ved 
asis at Halevedhamgene. lste Par Folere uoget kortere 
lll d Hovedskjoldet, med lste Led omtrent saa langt som 
<e 0 "ige tilsammen. Saxfodderue af middelmaadig Stpr- 
*^ se > ni ed Haanden -noget udvidet mod Enden og den ydre 
Vant torsynet med en kort takket Kam ; Fingrene lidt kor- 
^ re end Palin on, den bevaigelige i Yderkanten saugtakket. 
alevedhmngene lamgere end sidste Segment med begge 
Tiene 2-leddede, den ydre sterdeles liden, den indre 3 
Lange saa laug, med sajrdeles lauge divergerende Ende- 
berster. Farven livid. Ltengden indtil 3.70™"'. 
Bindested. Havnen ved Reikjavik. 
Benaeerkningar. Yed den noiere UudersOgelse, som 
j og f'ornylig liar anstillet over de til naervserende Tribus 
""mule Former, bar jeg fundet, at den at mig som en uy 
.. L- opstillede Form, Tanais islandicus , ikke skiller sig Ira 
olljeborgs T. longiremis. Den opfores derfor her under 
rette N avn, og da Figurerne allerede var graverede 
"'den jeg kom til dette Resultat, vedfoier jeg nedentor en 
"dt'orlig Beskrivelse, skjondt en saadan egentlig, after den 
01 'bfte Arbeide lagte Plan, ikke skulde meddeles her. 
Arton er let kjendelig fra de ovrige til denne Slaegt 
'"rende Former ved Saxfoddernes Bygning og de sserdeles 
Uhge "dviklede Grene paa Halevedhiengene, samt ved de 
"SfKdvanlig l an ge Endeborster, bvormed disse, og navnlig 
e " indre Gren, er forsynede. 
forms. Most of these were discovered by Professor Lillje- 
borg. off Bohuslan, in Sweden, and the West Coast of Nor- 
way. For the rest, the genus is also represented in the 
Mediterranean and off the eastern shores of North America. 
All these species arc apparently true deep-sea forms, and 
the absolute want of eyes would seem to be in strict ac- 
cordance therewith. 
15. Leptognathia longiremis, (Lilljeborg). 
(PI. VII. tigs. 17 — 28). 
Tanais longiremis, Lilljeborg, Bidrag' til Kundskab orn de inom Sverige 
och Norrige fdrekomande Orustaceer af Tanaidernas underfamilj, 
No. 7. 
Tanais islandicus , G. 0. Sars, Prodromus descriptionis Crust, etc., 
No. til. 
Leptognathia longiremis, G. 0. Sars, Be vision af Gruppen Isopoda cheli- 
fera, p. 11. 
Specific Character. — ? Body of a slender, linear 
form, with its greatest breadth scarcely more than one- 
seventh of the length. Cephalic shield considerably longer 
than broad, tapering throughout, with the frontal margin 
abruptly truncate. Abdomen of same breadth as anterior 
division, terminal segment comparatively short, with a small 
dentiform projection at the base of the caudal appendages. 
First pair of antennae somewhat shorter than cephalic shield, 
with the 1st joint about as long as the others taken to- 
gether. Ohelipeds moderate in size, with the hand somewhat 
dilated toward the extremity, and provided on the outer 
margin with a short, dentate comb; fingers a trifle shorter 
than palm, the movable one serrate on the outer margin. 
Caudal appendages longer than last segment, with both 
branches two-jointed, outer exceedingly small, inner 3 times 
as long, with remarkably elongate, diverging terminal bristles. 
Colour white. Length reaching 3.70“"'. 
Locality. — Reykjavik harbour. 
Remarks. From the closer examination I under- 
took some time since of the various forms belonging to the 
present tribe, I found that the new species 1 had established 
as Tanais islandicus is not distinct from Lilljeborg’s T. 
longiremis. Hence, it is referred here under its proper 
designation; and as the figures had been already engraved 
previous to my arriving at this result, 1 annex below a 
detailed description, though, strictly, such does uot come 
within the compass of the present Memoir. 
The species may he easily distinguished from the other 
forms belonging to this genus by the structure of the chcl- 
ipeds and the very unequally developed branches on the 
caudal appendices, as also by the unusually long terminal 
bristles with which those parts, in particular the inner 
branch, are furnished. 
