THE COLUMELLA AUKIS I]^ AMPHIBIA. 



Second Contribution. 



B. F. KINGSBURY AND H. D. REED. 



Table of Contents. 



PAGE. 



I. Introductory 549 



II. Descriptive. 



Ambystoma pnnctatnni 554 



Other AmbystomidiTe 563 



Salamandra maculosa 556 



Triton cristatus 569 



Diemictylus viridescens 574 



Tlie Pletlaodontidse ^ 576 



Desmognathus fusca 584 



Typhlomolge ratlabuni 586 



Necturus marculosus _ 589 



Cryptobranchus allegbeniensis 591 



Megalobatrachus japonicus 595 



Amphiuma means _ 596 



Siren lacertina _ . . . 598 



III. General. 



The suspensorial connection 600 



The Columella and Operculum 603 



Comparison with Annra 608 



Ligaments _ 611 



The Hyomandibular-symplectic Homology 612 



The Function 618 



IV. Summary _ 621 



V. Literature 624 



VI. .Abbreviations 627 



VII. Explanation of Plates. 

 VIII. Plates I-X. 



In 1908 the authors published a partial report^ upon the morpho- 

 logical relations of the so-called Sound-transmitting Apparatus in 

 representative Urodelcs with a view to establishing the type or types 



^Anatomical Record, Vol. 11, No. 3, June, 1908, pp. 81-91. 

 The Journal of Moephologt. — Vol. XX, No. 4. 



