1877.] CRUSTACEA, CHIKFLY FROM SOUTH AMERICA. 665 



Armadillidium, Brandt. 

 Armadtllidium CiBLATUM, sp. D. (Plate LXVII. fig. 3.) 

 Convex, very finely and closely punctulated and pubescent. Head 

 transverse-oblong, closely encased in the first segment of the body, 

 with the anterior margin reflexed, more prominent in the centre, 

 and slightly sinuated toward the antero-lateral angles, which are not 

 prominent. Eyes minute, placed close to the antero-lateral angles. 

 First segment of the body somewhat larger on the sides than the 

 rest, with the postero-lateral angles acute, the posterior margin 

 slightly excavate ; following segments with the posterior margins 

 nearly straight. Segments of the tail short ; third to fifth bent 

 backward on the sides ; terminal segment broader than long, tri- 

 angular. Terminal joints of the uropoda transverse when viewed from 

 above. External antennse with the last two joints (flagellum) to- 

 gether about as long as, but more slender than, the preceding joint, 

 the penultimate much shorter than the terminal joint. Colour 

 generally dark brown. Length about 4 lines, breadth 2 lines. 

 Hab. Cayenne. 



Armadillo, Latr. 



Armadillo vulgaris. 



Oniscits armadillo, Linn. Syst. Nat. (ed. xii.) p. 1062 (1/66). 



Armadillo vulgaris, Latr. Hist. Nat. Crust, et Ins. vii. p. 48 

 (1804) ; Leach, Trans. Linn. Soc. xi. p. 376 (1815) ; Spence Bate 

 and "Westwood, Hist. Brit. Sessile-eyed Crust, ii. p. 492 (1868). 



Armadillidium vulgare, M.-Edw. Hist. Nat. Crust, iii. p. 184 

 (1840); Kinahan, Nat.-Hist. Rev. iv. p. 276, pi. xxi. figs. 3, 9-13 

 (1857). 



Hab. Cayenne. 



There are in the collection several examples of a species of 

 Armadillo purporting to have been collected at Cayenne, in 

 which, after a careful comparison with specimens of the common 

 British Armadillo vulgaris, in the British- Museum collection, I am 

 unable to detect any distinctive peculiarity whatever. They agree 

 in size, punctulation of the body, coloration, &c. With these 

 specimens was sent a single example of a Myriopod, which to the 

 inexperienced eye of a collector might, upon mere superficial exam- 

 ination, be easily mistaken for the same species as the Armadillo. 

 My friend and colleague in the Zoological Department, Mr. A. G. 

 Butler, informs me that this is certainly the European Glomeris 

 marginata, Olivier. It appears very probable that here (as in the 

 case of Cymothoa oestrum) the locality of the specimen has been 

 wrongly given. It is difficult to see how, in the case of the Arma- 

 dillidii (terrestrial Isopoda living under stones, in moist earth, &c.), 

 the same species could inhabit Europe and South America. 



This species is evidently very closely allied to the Armadillo 

 pilidaris of Say (Journ. Acad. Nat. Sci. Phil. i. p. 432, 1818), 

 from North America, of which a single specimen, presented by Say, is 

 in the British-Museum collection. In this specimen the terminal 



