. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 240 Bulletin Museum of Comparative Zoology, Vol. 156, No. 1. Figure 1. Still frames from an X-ray positive video (shutter speed 1/250 s) showing one gular pump cycle in Varanus exanthe- maticus (body mass = 600 g). The left column shows the animal in lateral projection, the right column in dorsoventral projection. Although not recorded simultaneously, frames in each row portray corresponding stages of a pump cycle. (A) Gular cavity relaxed. (B) Gular cavity expanded. (C) Buccal floor elevated. (D) Gular cavity compres
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 240 Bulletin Museum of Comparative Zoology, Vol. 156, No. 1. Figure 1. Still frames from an X-ray positive video (shutter speed 1/250 s) showing one gular pump cycle in Varanus exanthe- maticus (body mass = 600 g). The left column shows the animal in lateral projection, the right column in dorsoventral projection. Although not recorded simultaneously, frames in each row portray corresponding stages of a pump cycle. (A) Gular cavity relaxed. (B) Gular cavity expanded. (C) Buccal floor elevated. (D) Gular cavity compressed. Radiopaque markers (arrows) are placed at the choana (Ch), the sublingual plica (SP), and the glottis (G). Note the closure of the mouth and nares, which seals the gular cavity, as demonstrated by proximity of markers Ch and SP in (C).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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