ANATOMY OF THE OLFACTORY ORGAN 39 



conchas. Forms that possess these larger numbers of 

 conchas are known to be keen-scented and are termed mac- 

 ro smatic. Those in which the number of olfactory conchas 

 is small, four or fewer, such as the seals, some whales, 

 monkeys, and man, are known to be less acute of smell 

 and are called microsmatic. Others again, such as the 

 toothed whales, porpoises and the like, in which the olfac- 

 tory organ has almost completely degenerated, are sup- 

 posed to be devoid of olf action and are called ano smatic. 

 In such forms the nasal cavities have lost their original 

 sensory function and have come to be of importance only 

 in connection with respiration, a purely secondary relation. 



10. BIBLIOGRAPHY. 



ALCOCK, N. 1910. The Histology of the Nasal Mucous Membrane; of the 



Pig. Anat. Rec., vol. 4, pp. 123-138. 

 ABNSTEIN, C. 1887. Die Methylenblaufarbung als histologische Methode. 



Anat, Am., Bd. 2, pp. 125-135. 

 ASAI, T. 1913. Untersuchungen fiber die Structur der Riechorgane bei 



Mustelus laevis. Anat. Hefte, Arb., Bd. 49, pp. 441-521. 

 BABUCHIN, A. 1872. Das Geruchsorgan. Strieker, Handb. Lehre den 



Geweben, Bd. 2, pp. 964-976. 

 BALLOWITZ, E. 1904. Die Riechzellen des Flussneunauges. Arch. mik. 



Anat., Bd. 65, pp. 78-95. 

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Sense of Smell. Jour. Comp. Neurol., vol. 11, pp. i-xl. 

 BEDFORD, E. A. 1904. The Early History of thei Olfactory Nerve in Swine. 



Jour. Comp. Neurol., vol. 14, pp. 390-410. 



BLAUE, J. 1884. Untersuchungen liber( den Bau der Nasenchleimhaut bei 

 Fischen und Amphibien. Arch. Anat. Physiol., anat. Abt., 1884, pp. 

 231-309. 

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schlichen Nasenhohle. Arch. mikr. Anat., Bd. 39, pp. 632-651. 

 DISSE, J. 1896a. Ueber die erste Entwickelung des Riechnerven. Sitzb. 



Gesel. Natururiss. Marburg, 1896, pp. 77-91. 



DISSE, J. 1896b. Ueber Epithelknospen in der Regio olfactoria der Sauger. 

 Anat. Heft, Abt. 1, Bd. 6, pp. 21-58. 



