378 K.SrepHensen: Zoogeographical Investigations in Southern Greenland. 
Of the 23 Crustacea and Pycnogonida above mentioned 2 (Mesi- 
dotea sabinei and Herpyllobius arcticus) are truly arctic; 9 are mainly 
arctic, viz: Eupagurus pubescens, Spirontocaris spinus, Stegocephalus 
inflatus, Acanthozone cuspidata, Parapleustes pulcher, Unciola leucopis, 
Erichthonius megalops, Podocerus latipes, Pseudopallene circularis; the 
remainder are boreo-arctic. Of true arctic species, the “Rink” found 
only Eupagurus pub., Spiront. spinus, Stegoceph. infl., Herpyll. arct. 
and Pseudopallene circ. and these only at depths < 200m. i.e. in the 
arctic littoral belt. 
Dr. NorpMaNN found in all 23 Echinodermata, as follows: 
Chirodota laevis Asterias Milleri 
Myriotrochus Rinku — polaris 
Cucumaria frondosa Ophiura Sarsii 
— calcigera — robusta - 
Psolus Fabricii — nodosa 
— phantapus Ophiocten sericeum 
Phyllophorus pellucidus Ophiopholis aculeata 
Ctenodiscus crispatus Amphiura Sundevalli 
Solaster papposus Amphipholis Torelli 
Pteraster muilitaris Ophiacantha hidentata 
Henricia sanguinolenta Gorgonocephalus eucnemis 
Stichaster albulus 
Of these, only 2, viz: Chirodota laevis and Phyllophorus pellucidus 
were taken exclusively at depths > 200m.; all the others were taken 
at somewhat varying depths, in the case of one species varying moreover 
from abt. 10 to abt. 400m. As to these, the same applies as in the case 
of the Crustacea, i.e. none of them are true deep sea forms, but all are 
(boreo-arctic or) arctic littoral forms, which can go down to considerable 
depths. The fact that a number of these species were also found in 
Bredefjord, not only < 200m., but also in the more Atlantic water 
deeper down, shows that several of the Echinodermata are compara- 
tively little affected by considerations of temperature. 
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