ON TOLYPEUTES TRICINOTUS. 439 
The stomach is of the ordinary shape, with but a short lesser 
curvature. It is muscular, but not powerfully so, at its pyloric end. 
Along its greater curvature, when laid out flat, it measures 6} inches. 
’ The liver has the lateral fissures deep, whilst the umbilical fissure 
is comparatively insignificant. The gall-bladder is partly, but not 
deeply, embedded in the abdominal surface of the right central lobe. 
The Spigelian lobe forms a short rounded cone, very broad at its 
base. According to the method elsewhere suggested by me,* the 
formula of the bulk of the lobes is thus expressed— 
L.L. 13>R.C.>R.L. 2>L.C. 2>C. 
The small intestines measure 75 inches, the large intestine 6-5 
inches. There are no ceca; but there is an abrupt change in the 
diameter of the alimentary canal at the ileo-cecal valve, as in T. 
conurus and in the genus Tatusia. 
The uterus is triangular, the fundus being perfectly straight when 
‘viewed from in front, and the Fallopian tubes joining it at the ex- 
. treme upper and outer angles. The conical clitoris is an inch long; 
‘and the genito-urinary orifice is a longitudinal slit 0-3 inch from its 
apex. 
Among the various papers on the visceral anatomy of the Dasy- 
podidz I may refer to Hunter’s description of Tatusia peba,t Professor 
Owen’s account of the same species, and of Dasypus sexcinctus,t and 
Hyrtl’s monograph of Chlamydophorus truncatus. To these I may 
add iny own notes on Xenurus unicinctus, together with those upon the 
other species which have passed through my hands, as an assistance 
towards the determination of the affinities of Tolypeutes. 
In Xenurus unicinctus the gall-bladder is so deeply embedded in 
the tissue of the right hepatic lobe that it nearly penetrates to its 
diaphragmatic surface. This I find to be the case in Dasypus villosus, 
D. sexcinctus, and D. vellerosus; whilst in Tatusia hybrida and Toly- 
peutes tricinctus it is much less sunk. The cystic duct is very much 
twisted in a corkscrew manner. The proportional bulk of the hepatic 
lobes is almost exactly the same asin Tolypeutes tricinctus. In Tatusia 
peba and T. hybrida the right central lobe is the largest, not the left 
lateral. In Tatusia the umbilical fissure is less significant than in 
Dasypus, Xenurus, or Tolypeutes. 
The junction of the large and small ities in Xenwrus is as in 
Tatusia peba and T. hybrida, there being no cecal dilatations, as 
* “ Proceedings of the Zoological Society,” 1875, p. 57. (Supra, p. 274) 
t “Essays and Observations on Natural History,” 1861, vol. ii. p. 182. 
. I “Proceedings of the Zoological Society,” 1831, pp. 141 and 154, and “ Pro- 
ceedings of the Zoological Society,” 1832, p. 130. 
§ “ Denkschr, der kais. Akad. Wien,” ix. 1855. 
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