342 



ASELLID^E. 



its base, and with its extremity forming two wide but 

 shallow emarginations, within which are affixed two long 

 caudal appendages (or uropoda), composed of an oblong 

 basal joint, supporting two elongated branches. On its 

 under surface the tail bears two opercular plates, divided 

 transversely by an articulation across the middle, which 

 cover the branchial plates, and bear at the base a com- 

 plex apparatus in both sexes. 



The only British species, and two others, natives of 

 North America, occur in fresh-water ponds and lakes. 



The following vignette, taken for us by the Rev. J. M. 

 Joass, of Eddestown, is a view of the Blasted Heath of 

 Shakespeare, Forres seen in the distance, taken near a 

 pool from which the Rev. George Gordon has sent us 

 some very Uirge specimens of Asellus aquaticus. 





THE BLASTED HEATH, FOURES. 



