THE COLUMELLA AURIS IN AMPHIBIA. 



Second Contribution. — r j , /• n , i a i ? 



B. F. KINGSBURY AND H. D. REED. '"^ 



0^33/ 

 Table op Contents. 



PAGE. 



I. lutroductory 549 



II. Descriptive. 



Ambystoma punctatum 554 



Other Ambystomid:ie 563 



Salamandra maculosa 556 



Triton cristatus 559 



Diemictylus viridesceus 574 



The Plethodontidse _ 576 



Desmoguathus fusca 584 



Typhlomolge rathbuni 586 



Necturns marciilosus _ 589 



Cryptobranchus alleghenlensis 59I 



Megalobatrachus japonicus 595 



Amphiuma means _ 596 



Siren lacertina _ . . . 598 



III. General. 



The suspensorial connection 600 



The Columella and Operculum 603 



Comparison with Anura 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 Urodeles with a view to establishing the type or types 



•Anatomical Record, Vol. II, No. 3, June, 1908, pp. 81-91. 

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



