mo 



BULLETIN r)4, UNITED STATES NATIONAL MUSEUM. 



PSEUDARMADILLO CARINULATUS Saussure. 



I'seadartnadiUo vdvhiuhihia SaI'ssLtkh, lievue et Ma^'itsin de Zoologie (2), IX, 



1857, J). 808; Mrni. dc la Soc. de Physique et d'Hi«t. nat. de Geneve, XlV, 



1858, I't. 2, p. 48H, pi. V, ti},'S. 4:{-43a.— BuDUErLuND, Crust. Isop. Terrestria, 

 1885, pp. 41-42.— KicHAKDsox, Proc. l'. S. Nat. Muh., XXIII, 1901, p. 572. 



Loadity. — jNlexico or Cu))iL 



Body ru^'ose, tiil)orcuhited; the last seo'inent of the thorax ,stroii<j;ly 

 tuberculated; abdomen ornamented with a median series of tubercles. 

 Inferior margin of the head forming three rounded lobes, project- 

 ing in front, the median one of which is the largest and a little more 

 in advance of the lateral ones, which are obliquely directed. The 

 uropods are rather deformed. Their second article, seen from below, 

 presents near the ba.se a kind of transverse ridge; it becomes larger 



toward the end and terminates in a large 

 bordei', the two extremities of which are 

 rounded instead of forming angles. The in- 

 ner margin of this article is thickened, in 

 such a wa}' as to offer a small surface some- 

 what excavated, and separated from the in- 

 ner surface by a prominent, distorted ridge. 

 At the base of this surface one sees a little 

 lamella attached to it, which is probably the 

 inner branch of the uropoda. Above, the 

 second article appears in the form of a band, 

 which is placed along the lateral margin of 

 the segment; this band is a little distorted 

 and elevated above, especially at its anterior 

 extremity, where it is also a little larger; 

 at its posterior extremity it forms an angle, 

 which is the inner angle of the margin of 

 the uropoda, to which is articulated the 

 third article, which is very small. The last abdominal segment is in 

 the form of a truncated triangle, not extending beyond the extremity 

 of the uropoda, and which is separated from theni a little; its lateral 

 margins are not straight, but a little sinuated. The body is very 

 rough, all covered with little tubercles, rugose. The head is bor- 

 dered anteriorly with a transverse elevation furnished with a line of 

 tubercles. The first thoracic segment is all covered with rugosities, 

 except at the sides, w^hich are produced backward in the form of 

 a large rounded process, the inferior margin of which is elevated 

 in such a way as to form a concave surface. The other segments are 

 entirely rugose, except on th« anterior half, Avhich is smooth for articu- 

 lation; their inferior extremiti(>s are produced backward in the form 

 of narrow processes, a little eUnated, less rugose, and carrying above 

 a projecting longitudinal line, which is still to be seem on the third 



Fig. 702.— PSEUDARMADILLO CARIN- 

 ULATUS (After Saussure). a. 

 Head and first segment of 

 THORAX, h. Abdomen and uro- 

 poda. (Enlarged.) 



