34 



sence, being concealed in a fold of the epistoma. Also for 

 the fourth family, Oniscidce, I am obliged to propose a correc- 

 tion, »Mala interior maxillae prioris paris penicillis duobus, 

 ?eqiialibus« must be altered to »Mala .... penicillis duo- 

 bus, suba'qualibus aut rarissime penicillis pluribus, s;ppe 

 ina3qualibus«, since that Mr. Dollfus had shown*) this re- 

 lation in some species of his genus Mesarmadillo, and 1'"*) 

 myself had illustrated it in a group, Eubelinw. belonging 

 to the family of Oniscidw. 



For this fourth family, Oniscidw, which contains the 

 largest number of the known forms, the characters are given 

 in my Crust. Isop. p. 1 3. It will, however, in the meantime, 

 be more convenient to divide this family in further subfamilies. 



It is necessary now to undertake such a revision, the 

 numerous publications of new^ species from the different 

 localities of the globe having brought no better understanding 

 of this group of Crustacea; furthermore it is clear, that 

 as yet only a small part of the species living in our globe 

 are at present knov^n. 



The published descriptions without exception, the best 

 among them as well as those without value, and these last are 

 not few, introduce but new forms in the old frames, and this 

 arrangement is often but owing to external likeness, based on 

 careless examinations. But one thing is reached, that it 

 has been clear, that a new classification is necessary, be- 

 cause introduction of species by the hundred to a genus is 

 worthless in itself even for the registration in a museum. 



The frames of these subfamilies will include forms af- 

 ter new lines very different from the assertions earlier made 

 by me, and they will no doubt for several be surprising. 

 My old classification in Armadilloidea and Oniscoidea, which 

 I dubiously had set up and which others have accepted. 



*) A. Dollfus: Crust. Isop. Ter. in Voy. Alluaud. d. Assinie. (Ann. 



soc. ent. Fr. 1892. p. 385). 

 **) G. Budde-Lund: A Revision of Crust. Is. Terr. Kjebenhavn 

 1899. 



