^^0. 646] THE PHYLOGENY OF THE CAUDATA 



427 



^^5. Hynobiidse 5 genera, 20 species. 



Hynobius 15, Fachypdla'm.inus 1, 



6. Cryptobranchidae 2 genera, 2 species. 



Megalolatrachus 1, Cryptobranclius 1. 



Necturus 2, Proteus 1. 



Meantes (Eelationsliips uncertain) 



8. Sirenidse 2 genera, 2 species. 



Siren 1, Pseudolranchus 1. 

 Total number of genera .38, of species 165. 



LITERATURE CITED 



Dunn, E. R. 1920. Notes on Two Pacific Coast Ambystomidae. Proc. New 

 Enff nnd Zool. Club, VII, pp. 55-59. 



Kingsbury, B. F., and Reed, H. D. 1909. The Columella Auris in Am- 

 phibia. Jour. Morph., XX, pp. 549-628. 



Xoble, G. K. 1922. The Phylogeny of the Salientia. Part I. The Oste- 

 ology and the Thigh Musculature, their Bearing on Classification and 

 Phylogeny. Bull Amer. Mus. Nat. Hist., XLVI, pp. 1-87. 



Okajima, K. 1908. Die Osteologie des Onychoaacty'.us japonicus. 

 Zeitschr, wiss. Zool, XCI, 3, pp. 351-381. 



Reed, H. D. 1920. The Morphology of the Sound-transmitting Apparatus in 

 Caudate Amphibia and its Phylogenetic Significance. Jour. Morph., 

 XXXIII, pp. 325-375. 



Smith, L. 1920. The Hyobranchial Apparatus of Spelerpes bialineatus. 

 Jour. Morph., XXXIII, pp. 527-550. 



Wiedersheim, R. 1877. Der Kopfskelet der Urodelen. Morph. Jdhrb., 

 Ill, pp. 352-548. 



Wilder, I. W. 1920. The Urodele Vomer. Anat. Becord, XVII, p. 349. 

 Wilder, I. W., and Dunn, E. R. 1920. The Correlation of Lunglessness in 

 Salamanders with a Mountain Brook Habitat. Copeia, 84, pp. 63-68. 



