. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 162 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY The relationship of these three parts of the conchal zone is best seen in transverse sections such as are shown in Figure 58. Beecker and Fuchs term the anteriormost of the three main divisions of the cavum the Nasenvorhof; however, since other workers, such as Kathariner (1900), have used it to designate the vestibulum, the term is not employed in the present work. The only other difference in usage is that the ductus nasopharyngeus of the present paper is considered to be
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 162 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY The relationship of these three parts of the conchal zone is best seen in transverse sections such as are shown in Figure 58. Beecker and Fuchs term the anteriormost of the three main divisions of the cavum the Nasenvorhof; however, since other workers, such as Kathariner (1900), have used it to designate the vestibulum, the term is not employed in the present work. The only other difference in usage is that the ductus nasopharyngeus of the present paper is considered to be a part of the Choanengang by Beecker and Fuchs. In the descriptions of Jacobson 's organ, the anteroventral pro- jection into its lumen is here termed the mushroom body. This structure is generallv known bv that term or a variant such as rS. Figure 37. Medial view of the left nasal cavity of Drymarchon to show the lateral wall. Figure 38. Medial view of the left nasal cavity of Crotalus to show the lateral wall. The bristle passes through the naris externus. pilzenformige AVulst or fungiform eminence, but is sometimes referred to as the concha of Jacobson's organ. Three genera were studied in the present investigation. Dis- sections were made of the heads of Drymarchon corals and Cro- talus adamant ens, and slides of an adult Storeria dekayi were also examined. Unfortunately, the last is an incomplete series and many of the sections are not in ideal condition, so that the bulk of the description is based on the first two forms. Figure 37 shows the lateral wall of the nasal cavity of Dry- marchon. The naris externus is a large, nearly circular opening. 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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