The Journal of 



Comparative Neurology and Psychology 



Volume XVII JANUARY, 1907 Number i 



ON THE PLACE OF ORIGIN AND METHOD OF DISTRI- 

 BUTION OF TASTE BUDS IN AMEIURUS MELAS. 



F. L. LANDACRE. 



{Associate Professor of Zoology, Ohio State University.) 



With Plate I and Four Figures in the Text. 



CONTENTS. 



Introduction i 



I . Historical Sketch 2 



(a) Taste or Terminal Buds 3 



(fe) The Communis System 4 



1. Materialand Method 9 



3. Gross Distribution ofBuds in Oral.Pharyngealand Cutaneous Areas at Various Ages 14 



4. The Dorsal Lip and Maxillary Barblet Group • ■ • • 2.0 



5. The Ventral Lip and Barblet Group 2,2 



6. The Nasal Group 26 



7. ThePost-orbital AND Opercular Group 29 



8. TheCerebellar, Occipital and Body Groups 34 



q. The Anterior Palatine Group 39 



10. The Posterior Palatine Group 4° 



11. Summary of THE Oral AND Cutaneous Groups 4^ 



12. The Gross Distribution oftheBuds inthePharyngealGroup 48 



13. The Cerato-branchial and Roof Buds 5^ 



14. The Mid-ventral Pharyngeal Buds 54 



15. The (Esophageal Buds 5^ 



16. Summary OF Pharyngeal Group 59 



17. General Summary 61 



INTRODUCTION. 



The present investigation was undertaken with the object of 

 ascertaining, if possible, at what time and in what order taste or 

 terminal buds appear in the anterior oral cavity and on the outer 

 body surface of Ameiurus melas as compared with those situated 

 in the pharynx. 



