656 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



Tin 1 lateral border is curved upward, forming a slight concavity. On 

 either side of the segment halfway between the median line and the 

 lateral margin, and on the posterior part of the segment, is a long 

 stout spine, directed backward. The coxopodites are distinct the 

 entire length of the first segment on the under side and each is in the 

 form of a ridge, ending in a bifurcate tooth-like process. The second 

 thoracic segment has the coxopodites of the 

 under side in the form of tooth-like processes. 

 The lateral spines of the second, third, fourth, 

 fifth, and sixth segments form two longitudinal 

 series, one on either side of the median line, 

 halfway between that and the lateral margin, 

 and in line with those of the first segment. The 

 spines of the seventh thoracic segment are, how- 

 ever, much closer together and are also much 

 longer. The seventh segment is produced back- 

 ward about the center, so that it is longer at 

 that point than at the sides. The lateral por- 

 tions of the second, third, fourth, and fifth 

 segments are drawn out in narrow rounded 

 processes, slightly curving upward at their 

 extremities. The sixth and seventh segments 

 have the lateral portions drawn out in processes 

 which are somewhat truncate at their extrem- 

 ities. All these segments are thickly tuberculate 

 except at the sides and on the anterior portion, where the segment 

 articulates with the one immediately anterior to it. 



The first two segments of the abdomen are concealed by the last 

 thoracic segment. All the abdominal segments are tuberculate. One 

 tubercle in the median line of the third segment is somewhat enlarged 

 and more prominent than the others. One tubercle in the median line 

 of the fourth segment is slightly more enlarged 

 than the tubercle of the preceding segment. A 

 long stout spine directed backward is present on 

 the fifth abdominal segment in the median line. 

 At the base of the terminal segment is a large 

 prominent tubercle, very much larger than those 

 of the third and fourth abdominal segments. 

 The terminal segment is triangularly shaped, with the apex produced 

 in a truncate process. The basal segment of the uropoda, seen from 

 the dorsal side, is large, wider at the base than at the apex, filling 

 the space between the lateral process of the fifth abdominal and the 

 terminal abdominal segments, and continuing the oval outline of the 

 body. The outer branch is very small and is inserted at the posterior 

 angle of the basal joint. The basal joint, seen from the under side, la 



FIG. 696. PSETTDARMADILIX 



HILUANUS. X 5. 



FIG. 697. PSEUDARMADILLO 

 GILUANUS. ABDOMEN. 



X 5. 



