24 University of California Publications in Zoology [Vol. 27 
Species entirely terrestrial, eggs deposited in damp situations on 
land : 
Family Plethodontidae (except Aneides l. lugubris ) 
Species terrestrial or arboreal, eggs deposited in damp situations 
at or above surface of ground: 
Aneides lugubris lugubris 
NOMENCLATURE 
The sequence of species in the following list is exactly that of 
Stejneger and Barbour (1923) except that Bana catesbeiana is placed 
after the native frogs because it is an introduced species. The nomen- 
clature of the check list cited is followed save where material given in 
the text indicates the necessity for change. Some readers may raise 
the objection that an undue number of changes have been made in the 
scientific names of our familiar species of amphibians, particularly 
salamanders. To this I would reply that there has been an unusual 
and pleasing development of interest in the group within the past 
decade, and reexamination of many of our species (particularly by 
Dunn with the advice of Stejneger) has shown the necessity for many 
changes. The problems in amphibian nomenclature are by no means 
so complex as some of the contested cases among birds and mammals, 
in consequence of which we may expect that the present designations 
will in very large measure be final. The only instances of change in 
generic names used in the present paper concerning which there is 
any doubt in my mind are the resurrection of Gray ’s genus Ensatina 
for the two west-coast Plethodons, eschscholtzvi and croceater , and 
linkage of “ Spelerpes platycephalus” with the European Hydro- 
mantes. Dunn’s evidence on these points has not yet been presented 
in detail. The differences in the arrangement of the vomerine and 
palatine teeth and in the number of costal folds in the former are 
considerable and may well merit generic recognition. 
The years of publication given for papers in the Journal and Pro- 
ceedings of the Philadelphia Academy of Natural Sciences are based 
upon the information contained in the index volume to those series. 
Yarrow’s Checklist is cited as 1883 on the advice of Dr. C. W. Rich- 
mond (in letter). 
