ARMADILLO VULGARIS. 493 
Armadillidium vulgare. Mitye Epwanns, Crust. iii. p. 184. Bur- 
GERSDIJK, Annot. p. 51. Zavpaon, Syn. 
Crust. Pruss, p. 19. Jonsson, Syn. 
Framst. Sver. Onise. p. 34. 
Armadillium vulgare. Kinanan, Nat. Hist. Rey. vol. iv. 1857, 
p. 276, pl. xxi. figs. 3, 9—13. 
Oniseus cinereus. ZENKER, in Panzer, Heft. 62. n. 22. 
(Var.) Armadillo variegatus. LaTREILLE, Gen. Cr. et Ins. i. p. 72, n. 2. 
Kocu, Cont. Panzer, Heft. 178 n. 15, 
and 186, n. 2. 
Armadillidium Zenkeri. Branpt, Consp. Mon. Crust. Onise. Bull. 
Mose. vi. 185. 
(Var.) Armadillo opacus. Koon, Cont. Panz. Heft. 180, n. 3. 
(Var.) Armadillo Willit. Kocu, Cont. Panz. Heft. 186, n. 1. 
Armadillo pulchellus. ScunrrzuER, Onisc. Bonn. p. 26 (?). 
Tuts very widely dispersed species is subject to great 
variation in the amount of its pale markings, which has 
led to the establishment of a great number of supposed 
species, as appears from the citations quoted above. 
We have not been able to recognize more than a single 
species amongst them, which is well distinguished by the 
perfectly globular form in which it is able to roll itself 
up when alarmed, as represented in the lower left-hand 
figure of the accompanying wood-cut. The extremity 
of the tail and of the flattened truncated appendages of 
the last caudal segment exactly coincides with the front 
‘margin of the head, completely concealing the deflexed 
antenne and legs. 
The head is produced on each side immediately below 
the eye into a short transverse ridge, forming the upper 
edge of a groove, within which the basal joints of the 
antennz are lodged; the lower edge of the groove 
being also produced into a moderately prominent 
rounded lobe. The labrum or upper lip is triangular, 
and transversely prominent along its straight upper edge. 
The inner antenne are very minute and apparently 
three-jointed, the middle joint being the smallest, but 
