iS) 
CRUSTACEA COPEPODA. II. 
16 of which are new. Among the ror species 48 are parasites on fishes and only 19 among these have been 
taken by the “Ingolf’’; only 6 of these 48 parasites are new, and 4 among them were found on deep-sea fishes 
taken by the “Ingolf’’. During many years Kroyer, Steenstrup and Ljtitken had taken much interest in pro- 
curing and collecting parasitic Copepoda from fishes, and the fauna of these animals inhabiting fishes living 
generally in depths from near the shore and down to about a hundred fathoms at West-Greenland was very 
well known, owing to the commonly used papers published by these three Zoologists. As to parasites on 
Annelida only 2 species could be added to G. M. R. Levinsen’s paper (1877). In my monograph of the Chonio- 
stomatidee (1897) 8 species of these parasites living on various Malacostraca were described; in the present 
paper 18 species of that family are mentioned as taken in the “Ingolf” area, and 8 among them are new; 
it may be supposed that some few species living in the marsupium of Amphipoda may still be discovered by 
K. Stephensen who has begun to work out the rich material of this large order. 
When we proceed to the Asterocheridee and the forms living within Ascidians the results are quite 
different. Of Asterocheride not a single species was known from the “Ingolf”’ area; in the present paper 17 
species are enumerated, together with 1 species of the Lichomolgide; 11 among them are new, and Ir were 
found in sifted samples of bottom material secured by the “Ingolf’’; several were taken in considerable to 
great depths. Of Copepoda living within Ascidians only I species (wrongly determined) was known from the 
“Ingolf” area; in this paper 9 species are mentioned, 5 among them taken by the “Ingolf’’, 4 among them 
new, and one species is of peculiar interest, as it belong to the genus Cyclopina, but no species of this well- 
known type was hitherto known to live as a commensal. 
Probably only a very moderate number of fish-parasites living in the “Ingolf” area are still unknown, 
and most of them will be found on fishes from rather deep to very deep water. Several forms living within 
Ascidians are still to be discovered, and of the Choniostomatidee many forms may certainly be found, when 
enormous quantities of Cumacea, Amphipoda and Isopoda from most different depths have been procured 
and are specially inspected with the intention to discover parasites. A comparison with the Norwegian fauna 
of Asterocheride (sens. Giesbrecht) and Lichomolgidee gives the result that it must be possible to discover 
a large number of described and underscribed forms in the “Ingolf” area, when sifted bottom material taken 
from a hundred of places from near the shore and down to great depths, especially around Greenland, is 
thoroughly looked over. 
On the literature and the arrangement of the Copepoda in the present paper a little may be said. 
As to the Asterocheride, Lichomolgidee, Notodelphyoida, etc. the splendid treatment of G. O. Sars in Vol. VI 
and VIII of his “Account” is taken as guide; I cannot follow him in dividing f. instance the family Astero- 
cheridze Giesbr. into several small families, but this and similar questions are of slight importance in a faun- 
istic paper as the present one. In the arrangement of the parasites on fishes I follow the work of Thomas & 
Andrew Scott: The British Parasitic Copepoda. Vol. I—II (1913), excepting as to a few points within the 
family Lernzeopodidee. A couple of genera parasitic on Annelida (Selioides Lev., Sabellacheres M. Sars) and 
not found in the works mentioned are inserted where they seem to have their nearest relatives; the genus 
Tanypleurus Stp. & Itk., which is imperfectly known, is, in spite of sharp differences, put at the end of the 
Chondracanthidee as its probably nearest relations. C. B. Wilson’s valuable revisions of several families are, 
