No. 5.— Reports on the Dredging Operations off the West Coast 
of Central America to the Galapagos, to the West Coast of 
Mexico, and in the Gulf of California, in charge of ALEXANDER 
AGASSIZ, carried on by the U. S. Fish Commission Steamer 
“ Albatross,’ during 1891, Lieut.-Commander Z. L. TANNER, 
U. S. N., Commanding. 
[Published by permission of MarsmaLL McDoxar and J. J. BRICE, 
U. S. Fish Commissioners. ] 
XXII. 
The Isopoda. By H. J. Hansen. 
Tue collection contains in all fifteen species, fourteen of which, all 
marine, I have considered new to science, while, one form — belong- 
ing to the Oniscidee — is terrestrial in habit, and proves to be a well 
known species. Of the fourteen marine species, eight are free-living 
forms, and one is parasitic on fishes; these nine species are easily 
referred to genera established many years ago. The remaining five 
species belong to the subfamily Bopyrina, of the very extensive family 
Epicaridea; they present several peculiarities in structure, and more- 
over they are rather interesting since no form of the Bopyrine has 
heretofore been found on truly deep-sea animals. For particulars, how- 
ever, the reader must be referred to the special description later on. 
Besides my special account a few remarks must suflice.! Since each 
1 The Director of the Entomological Department of the Zoological Museum in 
Copenhagen, Inspector Dr. F. Meinert, had commenced to deal with the material, 
but being engaged in other work, he transferred to me the preparation of this 
report. Only the following particulars are of interest. He had recognized the 
two species of Asellota and all the species of Cymothoidwe as new to science; 
furthermore, he had furnished them with names, and on the labels briefly men- 
tioned the species already published to which each of the new forms was most 
closely allied. Some of the names and most of these hints on affinity are adopted 
in the report, which otherwise is wholly a work of my own. Yet it must finally 
be mentioned that Mr. G. Budde-Lund has determined the single species of 
Oniscide. 
VOL, XXXI. — NO. Ö 
