Page 229. 
Page 230. 
440 ON TOLYPEUTES TRICINCTUS. 
there are in Dasypus villosus, D. seacinctus, D. minutus, and D. vel- 
lerosus. 
The following measurements of the intestines demonstrate their 
relative lengths :-— 
v s ae a oS t nb 
Ss S . eS oP sans ‘i 
ad | so | § D | Sy | Se | 8 g 
s4 | 84 | #2 | Es | des | 88 
se. | £8:1-33)] 28.1 Jee 3 
$3 | 83 | 2) 8S | F2 [35 
& & by g Q iS) 
ft ft. ft. ft. ft. 
Small intestine . 16°3 146 18 °5 11°5 5-1 4:3 
Large intestine ..| 1°5 1% 1°6 1°25 7:0 0°66 
In Xenurus unicinctus the vesicule seminales are not present, the 
distal ends of the ureters being enlarged. Cowper’s glands and a 
prostate are present; and the apex of the glans penis is not trilobed 
as in Tatusia, but simple, as in Dasypus and Tolypeutes. The penis 
itself is huge. In Tolypeutes, according to Dr. Murie, the vesicule 
seminales are also absent. 
In Tatusia peba and T. hybrida the vesicule seminales are large, 
and there is a pair of lateral lobes to the apex of the glans penis. The 
whole penis is proportionally smaller in Tatusia than it is in Dasypus, 
as is the clitoris. In these respects Tolypeutes and Xenwrus agree with 
Dasypus, my experience being, as far as the male organs of Dasypus 
are concerned, confined to D. sexcinctus. 
In Dasypus, Tolypeutes, and Xenurus there are only a pair of 
nipples, in Tatusia there are two pairs. In Xenwrus wnicinctus the 
uterus is triangular, as in Dasypus and Tolypeutes. 
The brain of Xenwrus is intermediate in its form and surface-mark- 
ings between Dasypus and Tolypeutes. The hemispheres, when viewed 
from above, are considerably broader posteriorly than anteriorly, as in 
Dasypus. The olfactory lobes are large; and the corpora quadri- 
gemina are completely covered. The oblique sulcus on the back part 
of the superior surface of each hemisphere, which runs forwards and 
outwards, is present, as in Dasypus, but it is very short. The two 
other sulci are well developed, that in the frontal portion being longer 
than in either Dasypus or Tolypeutes. The upper or second sulcus 
runs from in front—near the anterior internal angle of the superior 
surface of the hemisphere—backwards and outwards for some distance, 
but not nearly as far as the posterior margin of the cerebrum, it ceas- 
ing a little behind the level of the outer extremity of the posterior 
oblique sulcus. In this respect it resembles Tolypeutes and differs from 
Dasypus (vide fig. 3). 
