82 
Lsengden af de erlioldte Exemplarer var kun 2.80’"'". 
Yed vore Xyster liar jeg fundet dem betydelig storre. 
Forekomst og Udbredning. N ogle faa Exemplarer 
af naervsereude Art toges under Expedition ens lste Togt i 
Havnen ved Keikjavik paa 16— 20 Favnes Dyb. Arten 
forekommer desuden ved Bohuslan (Lilljeborg) og langs 
hele Norges Kyst fra Kristiania til Vadsp. 
Gen. 1. 'T'.yplilotanais, G. 0. Sars, 1881. 
Revision af Gruppen Isopoda chelifera. 
Slsegtsoharaeteristik. Legemet mere eller mindre 
langstrakt, lineaert, med kun svagt mai’kerede Indsnoringer 
mellem Segmenterne. Ingen 0ine eller 0ienlober. lste 
Par Folere kos Hunnen 3-leddede, bos Hannen 0-leddede, 
med Basalleddet stort og pladeformigt udvidet. Kindbak- 
kerne kraftigt udviklede, med cylindrisk, i Enden knudret 
Tyggefortsats. Saxfodderne af ens Udseende hos begge 
Kjpn, afsmalnende mod Enden, med Haanden forholdsvis 
smal og Fingrene simple. De 3 bagerste Par Gangfadder 
kortere end de foregaaende, med opsvulmet. Basalled. Bag- 
kroppens Buglemmer bos begge Kjon vel udviklede. Hale- 
vedhsengene tvegrenede, med Grenene 1- eller 2-leddede. 
Brystposen bos Hunnen af normal Bygning. 
Bemserkninger. Fra de 2 foregaaende Slmgter er 
denne let kjendelig derved. at lste Par Folere bos Hunnen 
kun bestaar af 3 Led. Fra Skegten Paratanais, med hvilken 
den, bvad den ydre Habitus angaar, stemmer mest overens, 
skilles den ved den fuldstsendige Mangel af 0ine og 0ien- 
lober samt ved Kindbakkernes afvigende Bygning. 
Skegten indbefatter for Tiden ikke mindre end 10 
forskjellige Arter, bvoraf 1 middelhavsk, Resten nordiske. 
Alle dens Arter er segte Dybvandsformer. 
Length of tbe specimens collected not exceeding 2.80’"“. 
Off the coasts of Norway, I have met with considerably 
larger examples. 
Occurrence and Distribution. — A few examples 
of the present species were taken on the first cruise of the 
Expedition, in Reikjavik harbour, at a depth of 16 — 20 
fathoms. The species occurs, too, off Bohuslan (Lilljeborg), 
in Sweden, and along tbe whole coast of Norway, from 
Christiania to Vadsp. 
Gen. 3. Typhlotanais, G. 0. Sars, 1881. 
Revision af Gruppen Isopoda chelifera. 
Generic Character. — Body more or less elongate, 
linear, with but faintly marked instrictions between tbe 
segments. No eyes or ocular lobes. First pair of antennae, 
in female, three -jointed, in male six -jointed, with basal 
joint large and lamelliform-dilated. Mandibles powerfully 
developed, with a cylindric, at the extremity rugged, mast- 
icatory projection. Chelipeds of uniform appearance in both 
sexes, tapering toward the extremity, with the hand coni- 
paratively slender and the fingers simple. The 3 posterior 
pairs of ambulatory legs shorter than the preceding, with the 
basal joint tumid. Pleopoda well developed in both sexes. 
Caudal appendages biramous, with tbe branches either one 
or two -jointed. Marsupium of female normal in struc- 
ture. 
Remarks. — From the 2 preceding genera, this genus 
may be easily recognized by the 1st pair of antennae, in 
the female, consisting of but 3 joints. From the genus 
Paratanais, with which, as regards its outer habitus, it 
approximates closest, it differs in the total want of eyes 
and ocular lobes, and in the deviating structure of the 
mandibles. 
The genus comprises at present 10 different species, 
1 occurring in the Mediterranean, while the rest are ex- 
clusively Northern. All of the species are true deep-sea 
forms. 
