53- 



ANATOMY OF VERTEBRATES. 



453 



the right lung has four lobes : in some (Lion, Tiger, e. g.) the 

 left has two lobes ; in others (Dog, Hyaena) three lobes. 



In Chiromys, as in most Quadrumana, the lobulus impar is 

 superadded to the three ordinary lobes of the right lung: the 

 left lung is bilobed : all the lobes are distinct from each other 

 throughout. The tracheal rings, 26 in number in Chiromys, are 

 cleft behind, with the ends in contact, but not overlapping. The 



bronchi have shown dilata- 

 tions in some Lemuridce. 

 In a Lemur Macaco and a 

 Tarsius the left lung was 

 trilobed : as also in a Ba- 

 boon, in which, as in other 

 Catarhines, the lobulus im- 

 par is small: it is represent- 

 ed as a process of the right 

 lower lobe in Hylobates. In 

 a Simia Satyrus I found 

 both right and left lung 

 undivided. 1 In Troglodytes 

 the right lungs has three 

 lobes, the left two lobes, 

 as is the rule in the Bi- 

 manous order. 



§ 355. Larynx of Mam- 

 malia. — The vocal organ 

 appended to the respira- 

 tory system in Mammals 

 is a larynx answering to 

 the upper one in Birds. 

 It consists of cartilages, 

 sometimes ossified, joined 

 by ligaments, forming the 

 framework of a tube or 

 case (pixis cava, Anthro- 

 potomy), lined by mucous 

 membrane, which may be 

 produced into ' folds ' and 

 6 sacs ' and reflected over 

 elastic, sclerous, and muscular fibres. The larynx communicates 

 below (or behind) with the trachea, fig. 453, t, and above with 

 the pharynx. The chief or constant cartilages are the ' cricoid,' 



1 xxxiv''. p. 8. 



-Cartilages of the Larynx, and of the upper part of the wind- 

 pipe; Man, nat. size, ccxvn". 



1 



