832 The American Naturalist. [October, 
functionless rudiments of them, have been reported. In his last paper, 
in which are enumerated 15 of the 17 lungless species, Wilder says that 
“in the Salamandride lungless species are as numerous as those pos- 
sessing lungs, and that in consequence of this, the definition of the 
group must he modified.” It seems, however, that even with his pro- 
posed additions, the definition is still not sufficiently comprehensive, 
for the peculiarities in the structure of the heart certainly have almost 
as profound a significance as the absence of the lungs themselves, and 
should be incorporated in any definition that may be given. In addi- 
tion to the 17 lungless species already mentioned, the writer has found 
an additional one, Spelerpes gluttolineatus. 
In order that one may see at a glance in which families and genera 
lungless individuals are found, the following table, taken from Prof. 
Cope’s Batrachia of North America, is appended. [The last column is 
taken from the papers of Wilder and others]. 
i No. species without 
Families. Genera. No. of species. lungs or with only rudi- 
ments of them 
Cryptobranchidae { taraskanai ~ 
Amblystoma {12 RS A.J 1 A. opacum 
ni Siam] 
Amblystomidae oroarea 7 
oo ae ma 2 
Dicampt 1 
Hynobiu 5 
Hynobiidae | Salindri 2 
[all Asiatic] Onychodactylus 1 
Ranidens 3 
Batrachyperus 1 
(P. 
' P. erythronotus 
{ Plethodon 8 2} P. glutinosu 
Hemidactylium 1 
a : 1 B. attenuatus 
. tereochilus 
Plethodontidae Ant tod ax 3 1 A. lugubris 
i ? [European] ; G. fuscus 
Gyrinophilus 1 1 G. porphyrit 
culus 2 1M. pind K Ei PNE 
Spelerpes 9 S. bilineatus 
Oedipina sf . ruber 
S. gluttolineatus 
| Oedipus 9 
Thoriidae 4 Thorius 1 1 O. variegatus 
D. fusca 
D. f. brimleyorum 
Desmognathidae 4 Desmognathus 3 if 
D. f. auriculatus 
