ox A KAKK BKlllaU EMOMOSjTRACON. 05 



coveriiifj;," of which he here speaks, is rather doubtful. On this point 

 Kurz makes a statement which is more extraordinary than anythin;^ 

 yet related of it, and which distinguishes it from all its fellows. 



As is well-known, the Entomostraca. iu common with other 

 Crustacea, undergo periodical moultings of the outer skin, and at each 

 moult are always rather larger than the skin which they have cast off. 

 Hyocnjptut; sordldti^, however, does not cast off the old skin of its 

 carapace, but wears it like an overcoat that is rather too small for it 

 outside the new one. When it has several of these old coats on, each 

 a little smaller than the next, it presents a "ridged " appearance like 

 an oyster-shell. But as the edge of the carapace is fringed with 

 branched setfo, and these persist, each ridge is also bristling, (Fig. 2,) 

 and it is this structure that causes th^ dirt to adhere in such 

 quantities. 



