176 BRTJTA. 



opens into the very beginning or fundus of the common vagina ; the 

 middle orifice leads into the uncommon vagina, which soon dilates 1 . 



[Subclass LlSSENCEPHALA. 



Order Brut a. 



Family TARDIGRADA. 



Genus Bradypus.] 



The Two-fingered Sloth 2 , or LVUnau of Buffon, vol. 13, p. 58 

 [Bradypus didactylus, Linn.]. 



The thorax is short. The heart is short and round at the apex : the 

 two auricles almost cover the anterior surface of the basis of the heart : 

 the pericardium adheres to the diaphragm by loose cellular membrane. 

 [The thoracic part of the] vena cava inferior is short. The lungs, both 

 right and left, consist of one lobe ; and there is no lobe between the 

 heart and diaphragm. The upper ends pass up into long small points, 

 being not so obtuse as in most other animals, and going up a consider- 

 able way above the heart : their anterior edges adhere firmly to the 

 sides of the pericardium, those edges not coming so far forward upon 

 the sides of the heart as in other animals. They seem to be composed 

 of small lobes whi^h are united by cellular membrane, like those in the 

 human foetus. There was a conglomerated body in the situation of the 

 thymus. 



The liver has three lobes, viz. two with the Spigelian ; the right is 

 the largest, and the ligamentum rotundum enters its convex surface, 

 and passes through its substance : it has also a pretty large fissure in it. 

 The anterior surface of this lobe at its upper part has a falx passing 

 from the ligamentum rotundum to the right side, attaching it to the 

 diaphragm and abdominal muscles of the right side. The liver lies on 

 the right side, occupying nearly the right half of the abdomen at this 

 part, the first cavity of the stomach occupying the other half. The 

 gall-bladder, in Dr. Blane's 3 , lay in a fissure, and its fundus appeared 



1 [lb. Nbs. 2775, 2776. In a preparation of the female organs of an elephant, in 

 the museum at Guy's Hospital, the true vagina is very long and capacious, as in the 

 cavies, and the cornua uteri commence from a very short corpus, as in the same 

 Eodentia. For the foetal membranes and placenta of the Indian elephant, see 

 ' Philosophical Transactions,' part ii. 1857.] 



2 [Hunter quaintly calls this subject of Ms scalpel " Mr. Two-fingers : " it is cha- 

 racterized by two long-clawed digits on the fore-foot, and three such digits on the 

 hind-foot.] 



3 [Afterwards Sir Gilbert Blane, physician to the forces.] 



