VI 
The plates, as in the preceding Volumes, have been prepared by the aid 
of the autographic process, and great care has been applied to make them 
as instructive as possible. I especially have been anxious to give good and 
easily recognizable habitus-figures, not only of selected female specimens of each 
species, but also of the respective adult males, which, as is well known, in most 
cases are very rarely met with, and, owing to their very conspicuous difference 
from the females, have given occasion to much confusion in the systematization. 
As the literature referring to the Cumacea is far less extensive than 
that of other Crustacean groups, it lias been possible for me to give a rather 
complete list of publications arranged alphabetically according to the names of 
the authors. In the greater number of these publications, however, only slight 
notes on Cumacea are found. The more essential works are marked with 
an asterisk. 
Finally, I beg once more to offer my best thanks to the direction of the 
Bergen Museum, by whose assistance I have been enabled thus far to prosecute 
this great work, and which will, I hope, still assist me in continuing the work 
with several successive Volumes. 
G. 0. Sews. 
