CRUSTACEA COPEPODA. II. 83 
roo. Crypsidomus Terebellze Lev. 
1877. Crypsidomus Terebelle Levinsen, Vid. Medd. Naturh. Forening i Kjebenhavn, 1877, p. 25, Tab. VI, 
Fig. I9g—20. 
Occurrence. — Not taken by the “Ingolf’’. 
It is evidently not rare at West Greenland. It has been found on Thelepus civcinnatus at Upernivik, 
Lat. 72°47’ N., I specimen (Olrik); on Nicolea arctica at Proven, Lat. 72°23’ N. (Torell, Sv. Riksmuseum) ; 
at Ritenbenk, 40—50 fath. (Oberg, Sv. Riksmuseum); on Terebella cirratu at Egedesminde, many specimens 
(Levinsen), and I specimen from about 30 fathoms at the same locality (Bergendal); at Holstensborg on 
Thelepus circinnatus, I specimen (Bergendal), at Sukkertoppen on Thelepus civcinnatus, I specimen (Holbell) ; 
finally on Nicolea zostericola in Bredefjord, at Tat. 603/,° N. 40—70 m. (Stephensen leg. & det. 1916). 
Distribution. — Eastport, Maine, I specimen presented by Packard (Copenhagen Mus). Kara 
Sea, 53 fath.; I specimen on Avtacama proboscidea (H. J. Hansen, 1886). 
Psilomallus Kr. 
This enigmatic genus was established on a single specimen. 
tor. Psilomallus Hippolytes Kr. 
1863. Psilomallus Hippolytes Kroyer, Nat. Tidsskr. 3. Rekke, B. II, p. 410, Tab. XVII, fig. Io. 
Kroyer found a single specimen on the inner surface of the carapace of S#ivontocaris groenlandica 
J.C. Fabr. (Hippolyte aculeata O.Fabr., Kroyer) from West Greenland; the specimen seems to be lost. Judging 
from Kroyer’s figure and description I am completely unable to entertain any opinion on the relationship of 
the animal ; I am apt to guess that it represents a stage in the development of some perhaps unknown parasitic 
Copepod. 
Additional Remarks. 
In second line on p. 4 it is said o1 the Harpacticoida: “No form of this gigantic division is known to be parasitic’. As to the 
Harpacticoida from the “Ingolf’’ that statement is true, but as to forms outside our area it can not be maintained. In 1879 Chr. Auri- 
villius established Balenophilus unisetis Aur., found by him in great quantities on the baleen of Balenopiera Sibbaldii at Vads6, Kast 
Finmark; this Copepod, which according to Aurivillius and Sars certainly is a commensal, may perhaps also live within the “Ingolf’’ 
atea. — Furthermore G. P. Farran described (in 1914) a Harpacticid Copepod, Cholidva polypi, living in considerable number as a para- 
site on the inside of the arm-niembranes of a deep-water octopus, Polypus ergasticus, captured off the S. W. coast of Ireland. It may 
perhaps be possible to discover some allied parasite on Cephalopoda in the “Ingolf”’ area. 
11* 
