4Î9 



4. Mysis mixta Lilljeb. — Northern East Greenland, at 70° 60' 



N. L. and 72°28'N. L. 



The remainder of the Crustacea Malacostraca collected by 

 the first Amdrup Expedition comprises 2 species of Isopoda 

 and 23 species of Amphipoda, all from shallow water at the 

 district of Angmagsalik. The material of Amphipoda secured 

 by the second Expedition is of course much larger, but has 

 not yet been named. This second Expedition collected besides 

 a number of Cumacea, Isopoda and Tanaidacea; the material 

 of Cumacea comprises 12 species, 2 of which seem to be 

 new to science; the majority of the Isopoda and Tanaidacea, 

 viz,. 15 species, have been determined, but several species are 

 still unnamed, and at least two among them are new. 



It may be added that some years ago Cand. mag. С J. With 

 began to separate the pelagic Copepoda from the samples of 

 plankton taken by the "Ingolf", the second Amdrup Expedition, 

 etc. ; he has determined a part of this vast material, contemp- 

 oraneously working out the report. The second Amdrup Ex- 

 pedition brought home numerous bottles with plankton, but 

 Mr. With being abroad it is impossible to give further com- 

 munication on the matter. 



It may be added that same years ago I discovered a new 

 type of Cirripedia Rhizocephala in the marsupium of an Iso- 

 pod, Calathura brachiata Stimps., taken by the second Amdrup 

 Expedition in Forsblad Fjord, East Greenland. The parasite 

 (three specimens on the same host) has been described as a 

 new genus and species, Duplorbis calathurce, by Geoffrey Smith 

 in his Monograph on the Rhizocephala (Fauna und Flora des 

 Golfes von Neapel, 29. Mon. 1906). The author says that the 

 genus is "highly interesting but in some respects problematical." 



20-2—1909. 



