SOUND-TRANSMITTING APPARATUS OF CAUDATA 359 



means of interpreting the morphology of the various systems of 

 organs in these animals. The present discussion is not an 

 attempt, primarilj^, to meddle with the classification. 



It has been the aim in most instances to employ the same tech- 

 nical designation for the various groups and species of tailed 

 amphibians as were used in previous publications upon this sub- 

 ject. An attempt on the part of systematists, however, to estab- 

 lish a stable nomenclature through the application of the rule 

 of priority, together with views gained from more recent studies 

 regarding the affinities of groups, have wrought many changes 

 in names. In order to avoid the possibility of confusion, a com- 

 parative table of former names and those now considered correct 

 is here introduced. 



FORMER NAME NOW EMPLOYED 



Proteidae Necturidae 



Pleurodelidae Included with the Salaman- 



dridae 

 Diemictylus Notophthalmus 



Amblystomidae Amblystomidae 



Amblystoma Amblystoma 



Amblystoma punctatum Cope Amblystoma maculatum 



(Shaw) 

 Chondrotus tenebrosus Cope Amblystoma tenebrosum 



Baird and Girard 

 Spelerpes bilineatus Cope Eurycea bislineata (Green) 



Autodax lugubris Cope Aneides lugubris (Hallowell) 



Desmognathidae Included with the Pletho- 



dontidae 



The studies embodied in the present paper, as well as its fore- 

 runners, have emphasized, in the mind of the writer, three 

 points : a) that much of the confusion which has existed respecting 

 the sound-transmitting apparatus of the Urodela has resulted 

 from fragmentary studies, and that a true morphological inter- 

 pretation of the structures in question is to be arrived at only 

 through a complete developmental study of each distinct type 



