35 



while Sars*), and after him Chilton**) have enlar,2:ed to two 

 families, is without value. The family Scyphacince Dana, 

 Sci/pJmcidce Chilton, is with some restrictions a good suh- 

 famih^ 



I give below a conspectus after m}- present view, for 

 the connexions between the forms of Oniscidce. I shall also 

 give the proof for the proceeding of one of the subfamilies, 

 Sphvrlllonince; I have given it for an other subfamil}^ Eu- 

 helince, and I hope later to be able to give the relations for 

 the other subfamilies. 



My researches in these other subfamilies are also on 

 the whole ready for publication, they are the result of 

 nearly twenty years work with these Crustacea. After the 

 finishing of my work, Crust. Isop. Terr. 1885, I had not 

 thought to come again to treatment of these Crustacea, as 

 I was prepared to work on other matters. Meanwhile 

 I received continually from several museums and private 

 collectors larger or smaller collections for determination, and 

 because these often offered new and peculiar forms, which 

 gave enlightening of importance for the morphology of 

 these Crustacea and could be of use for corrections of 

 mistakes of mine and others, I resumed the work, and I 

 have spent the most of the otium, I could save from my 

 public and private affairs, with it. 



A studium through so many years, very often during time 

 which has been passed in different localities, during holidays 

 in town or country, often in foreign museums, has retarded 

 and has raised many difficulties for a coherent research; 

 that has also had influence on my illustrations. When 

 making examinations with almost all forms, and more especi- 

 ally with those of which I have seen only single examples 

 or where the chances of my seeing them again were remote, 

 I have made drawings of habitus and details to a number 



*) 1. c. V. II. p. 187. 



**) Ch. Chilton: Terr. Is. New-Zealand. (Tr. Linn. soc. Lond. 2 s. 

 VIII. 99). 



3* 



