684 



MB. P. G. PARSONS ON THE 



[Nov. 20, 



in the Ground-Porcupines there are practically two left central 

 lobes, a large ore 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 H.javanica in the 

 Museum of the College of Surgeons shows a very large and 

 somewhat sacculated one. In Erethizon'^ 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'^. 



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

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



ClECULATORT AND EeSPIEATORV StSTBMS. 



The suprarenals are closely adherent to their respective kidneys. 

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

 The thymus is large. 



rig. 4. 



The Lungs from the front. 



a.l. Azygos lobe. 

 ■p.a. Pulmonary artery. 



p.v. Pulmonary vein. 

 h. 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. 



^ Neither is there any in Sphingurus, 



