I 
Papers from Dr. Th. Mortensen’s Pacific Expedition 
1914—16. 
III. 
Marine free-living Nematodes 
from the Auckland and Campbell Islands. 
By 
Hjalmar Ditlevsen. 
With Plates I—III. 
Dr. Th. Mortensen has brought home a considerable number 
of bottom-samples from the different stations of his Pacific Expe¬ 
dition 1914—16. Of these samples there was picked out, among 
other material, a considerable quantity of free-living Nematodes which 
Dr. Mortensen was kind enough to forward to me for the pur¬ 
pose of having them worked out. As our knowledge of free-living 
marine Nematodes is very small, especially of the exotic forms of 
this group, the material of these animals collected by Dr. Mor¬ 
tensen is of considerable interest. 
Though the sorting of the bottom-samples has not yet been 
finished, marine free-living Nematodes have been stated from the 
following localities; The Auckland- and Campbell Islands, New Zea¬ 
land, New South Wales, The Philippine Islands, Japan, Hawaii, Cali- 
fornia and some other, more Northern localities of the Pacific coast 
of North America, Panama and the West Indies. It is to be ex- 
pected that the study of this material — besides enriching science 
with a great number of unknown forms — will contrive to throw 
light upon the geographical distribution of this group of animals. 
In agreement with Dr. Mortensen it was decided to work out 
the material according to localities. The first contribution which 
is found on the following pages deals with the marine free-living 
Nematodes from the Auckland- and Campbell Islands. 
Vidensk. Medd. fra Dansk naturh. Foren. Bd. 73. 
1 
