Additions and Corrections to the paper: On a 
new Gymnoblastic Hydroid (Zchthyocodium sarco- 
tretis) epizoie on a new Parasitic Copepod (Sarco- 
tretes scopeli) infesting Scopelus glacialis Rhdt. 
By 
Hector F. E. Jungersen. 
I am sorry to have made a wrong statement in the paper 
named above saying on p. 3: "In the Davis Strait it (oa: the Sar- 
'cotretes) seems not to occur; among some 330 specimens of Scop. 
glacialis collected by the Tjalfe” W. of Greenland, between ca. 
63% and 71? Lat. N., none were found infested.” This is not true. 
A few days ago Mr. Ad. Jensen found some tubes which 
had been set apart from the material of Scopelus glacialis from 
the '"Tjalfe-Expedition” handed over to me for examination. Evidently 
Mr. Jensen had forgotten the fact that he himself had observed 
the parasite and picked out the infested specimens of Scopelus, 
including them among the Crustaceans which were to be given to 
the Division of Arthropods of our Museum. Thus I naturally 
could not find parasites in any of the ca. 330 Scopel. glacialis 
caught between 63% and 71? Lat. N., every infested specimen 
having been taken out beforehand, and I think I cannot be blamed 
for the error I am now going to correct. 
The tubes contained 9 Scopelus glacialis, from 20 to 52 mm. 
in length, each carrying an adult female of Sarcotretes scopeli ; 
14% 
