L the following notes the family Asellide&e is taken within 
the same limits as does G. O. Sars !), that is excluding 
Munna. With HArGER ”) I agree in separating Limnoria from 
the other genera as the type of a family of its own. Many 
of the genera of the family are closely allied, but I think it 
wiser to retain them as different genera than to unite them with 
others, at least before a very detailed examination might be 
made. 
Cecidothea seems to be closely connected with dsellus 
Forelii and ÅA. cavaticus, but without any knowledge of the form 
of its pleopoda it is impossible to say whether it ought 
to be united with Asellus or not. The old genus Henopomus 
of KROEYER, on the other hand, is placed as synonymous with 
Ianira, because it is evident that IKRoEYER had no knowledge 
of the characteristics of Ianira quoted by LEAcH. Icridina was 
already by SPENCE BATE and WEstwoop united with JIcera;]I 
think they were right in doing so, as the only characteristic, 
quoted by MIiLNE EDWARDS for separating Ieridina from Iera, 
is common to all Izere. 
I have been induced to propose some new generic names 
in order to get more uniformity in the system. The family 
is a very natural one, defined as it is here, and one of the 
most interesting, because the different habits of its members 
show many peculiar modifications of their organs. 
1) »Oversigt of Norges Crustacéer, med forelgbige Bemserkninger over 
de nye eller mindre bekjendte Arter» Christiania Videnskabsselskabs 
Forhandlinger, 1882. N:o 18, p. 16. 
?) >Report on the marine Isopoda of New England and adjacent waters. 
Report of the U. 5. Commissioner of Fish and Fisheries. Part 6. 
1880. p. 313: 
