| OCR Text |
Show 10 MR. F. E. BEDDARD OX THE [Jan. 17, does not, as it does in Iguana, overlap the larger compartment of the lung posteriorly. It ends exactly on a level with the entrance of the bronchus into the main division of the lung. The interior of the lung in both genera is slightly sacculated, and the accompanying drawings (text-figs. 5, 6) illustrate the conditions obtaining in the two genera. It will be noticed that in Chlamydosaurus the dorsal sacculabions, though fewer, are more pronounced and deeper than in Physignathus, while the Text-fig. 5. Lung of Chlamydosaurus, opened to show internal structure. deeper honeycombed structure of the lung itself implies a larger respiratory surface and so far a greater efficiency as an organ of breathing. It appears to me to be a fair inference that this is associated with the bipedal and more active gait of Chlamydosaurus. In both genera the mesentery tying the lung to the |
