684 



MR. F. G. PARSONS ON THE 



[Nov. 20, 



in the Ground-Porcupines there are practically two left central 

 lobes, a large one externally and a small one internally. I found 

 no gall-bladder in Atherura or in the specimen of Hystrix cristata 

 with which I compared it, but the liver of 11. javanica in the 

 Museum of the College of Surgeons shows a very large and 

 somewhat sacculated one. In Erethizon 1 the left central lobe is 

 undivided, and the right lateral is as big as, if not bigger than, the 

 right central. In this specimen also there was no gall-bladder a . 



The kidneys are smooth on the surface, and on section show 

 several papillae ; the right one is, as usual, in advance of the left. 



Circulatory and Kespiratory Systems. 



The suprarenals are closely adherent to their respective kidneys. 

 On section they show a yellow cortex and a red medulla. 

 The thymus is large. 



The Lungs from the front. 



a.l. Azygos lobe. 

 p.a. Pulmonary artery. 



p.v. Pulmonary vein. 

 b. Bronchus. 



The larynx is remarkable for the great size of the cricoid as 

 compared with the thyroid cartilage. The epiglottis is broad and 

 notched ; on its laryngeal surface is a vertical ridge corresponding 



1 P. Z. S. 1882, p. 276. 



2 Neither is there any in Sphingurus. 



