256 The Irish Naturalist. December, 



The points by which Eluma is to be distinguished from 

 Armadillidium can be easily seen from the foregoing descrip- 

 tion. For instance, the simple eye, the slightly divided corner 

 of the lateral plate of the first segment, and the telson not 

 extending as far back as the uropods on either side of it; 

 'vhereas in Armadillidium the eye is always compound, the 

 corner of the lateral plate of the first segment is always un- 

 divided, and the uropods never extend beyond the telson. 



The following is a translation of Prof Budde-Lund's 

 description of the species E. purMirascens^ which at the time 

 he described it was the onh^ species of Kluma known. Prof 

 Verhoeff of Bonn, has, how^ever, lately described another 

 vSpecies from the Island of Teneriffe, which he calls Eluma 

 Helleri. 



El<UMA PURPURASCENS. 

 't Armadillidium cdlaium, Miers, Proc Zool. Soc. Land., 1877. 



Oblong-oval, ver)' convex, smooth, rather shiny, closely and minutely 

 punctured, clothed with thick short hairs. 



The basal joint of the flagellum of the antennae shorter by half than 

 the terminal, narrow at the base, the tubercle of the antennae thick, 

 oblique. 



The frontal lobe shortly triangular, slightly convex or flat in front, 

 rising slightl}' over the frontal margin. The line of the frontal margin 

 slightly curved on both sides, merging in the middle into the upper 

 margin of the frontal lobe. 



The posterior margin of the first body-segment slightly curved on 

 both sides, with the lateral edge thickened, the upper part slightly fur- 

 rowed, the lower part slightlv and not very inievenly divided. The 

 lateral plates of segments 3-4-5 rectangular. 



The telson short, shorter than wide, rather shorter than the uropods, 

 nearly triangular, with the apex rounded, nearly flat above. 



Colour purplish, or pale purple, 



Length, 11 mm. Width, 4-4.8 mm. Height, 2.5 mm. 



Most of the characteristics described above can be easily 

 made out by the aid of a hand-lens ; the colour is, however, by 

 no means so distinct, in fact, it was not until I got the speci- 

 mens in spirit under a good strong light, that I could see it at 

 all, and then only in some specimens. 



The general colour of the animal to the naked e)'e is a pale 

 coffee colour, and it may quite easily be passed over at first 

 sight as a young specimen of Arniadillidium vulgarc. I did 

 in fact so pass over two or three specimens, and it was not 



