No. 411.] LUNG OF DESMOGNATHUS. 18 
~ 
J 
of the aérated blood is not returned directly to the heart but 
enters ,the hepatic portal system through a pair of cesophageal 
veins. 
The demonstration of this respiratory organ puts the nec- 
essary meaning into the three facts enumerated above, for 
since there is a functional lung there must be respiratory 
movements performed by respiratory muscles, and thus the 
true function, both of the small muscles about the anterior 
uu 4 d 
| E (5 
nil speed de Ned) One, S ! pua; / - Art. Pharyngea. 
muscle gS d 
— € nL Portion of 
š 
Pulmonary arch. 
Esophageal ets m oou 4 trt. Gastrica anas- 
muscle. N, H tomoses here with 
the pulmonary 
ch. 
are 
bo-~4rt. Gastrica. 
| ~F. esophagea. 
bier Ben of pure and — of ere ae Aveo ied the plexus of blood 
. The b 
the author, based upon one published 
in set The blood vessels were added by Miss Nano. 
nares and the large internal set, becomes evident. Concern- 
ing these latter, the respiratory movements induced by them are 
of two kinds: an act of inspiration which expands the pharyngo- 
cesophageal region and an act of expiration which contracts 
it again. The muscles employed in inspiration are evidently 
those which arise from various dorsal and lateral points and 
become inserted along the sides of the pharynx and cesopha- 
gus, called by me the dorso-laryngeus, scapulo-pharyngeus, and 
