190 



as it is very common both in Sweden and Denmark. The figures here given 

 are from specimens kindly sent to me from the Museum of Copenhagen. 



Distribution. — Throughout the whole of Europe and the adjacent parts 

 of Africa and Asia; Madeira, New York, Montevideo, Melbourne. 



2. Armadillidium opaeum, (Koch). 



(PI. LXXXIII, fig. 1.) 

 Armadillo opacus, Koch, Deutschl. Crust, etc. 34, fig. 2, 3. 



Syn: Armadillidium conspersum, Zaddach. 

 „ „ sulcatum, B.-Lund (not M.-Edw.) 



Specific Characters. — Very like the preceding species as to its general 

 appearance, but of somewhat smaller size. Cephalon with the frontal margin 

 slightly arched, and surpassed by the ejiistomal shield. Side-plates of meso- 

 some discontiguous. Last segment of mesosome very broad, bluntly rounded 

 at the tip. Antennae with the last joint of the flagellum nearly twice as long- 

 as the 1st. Colour of dorsal face light grey, irregularly variegated with darker 

 patches. Length 9 mm. 



Remarks. — This species was at first confounded by B.-Lund with the Al- 

 gerian form A. sulcatum M.-Edw.; but in a supplement to his work he has kept 

 it apart from that species. It is very like A. vulgare, but, on a closer examina- 

 tion, it may be distinguished by the' somewhat different form of the cephalon and 

 of the last segment of the metasome, as also by the different colour of the body. 



Occurrence. — From Norway this species has not yet been recorded, but, 

 as it is not uncommon in Denmark together with A. vulgare, it is most pro- 

 bable, that, on a closer investigation, it will be found to exist also in this 

 country. The figures here given are from a somewhat incomplet specimen kindly 

 sent to me from the Museum of Copenhagen. 



Distribution. — Denmark, Germany, Bohemia. 



3. Armadillidium pietum, Brandt. 



(PL LXXXIII, fig. 2.) 



Armadillidium pietum, Brandt, Consp. pag. 24, fig. 6. 

 Syn: Armadillidium Grubei, Zaddach. 



Specific Characters.— Body oblong oval or elliptical in form, with the 

 dorsal face strongly vaulted and perfectly smooth and shiny. Cephalon with the 

 frontal edge somewhat prominent in the middle, lateral corners comparatively 

 small, rounded. Side-jdates of f st segment of mesosome with the posterior corner 



