183 
Plethodon erythrynotus and Desmognathus fusca will stand, but 
my fourth species is not Desmognathus ochrophaea but Spelerpes bili- 
neatus!). It is highly probable, however, that the entire genus Des- 
mognathus is lungless, and hence D. ochrophaea need not be removed 
from the list. CAMERANO and some other authors have mistaken the 
termination in the generic name, Desmognathus (Gk. yyadoc fem. = 
jaw) for a masculine and thus changed the specific name; for example, 
‘fuscus’ instead of the correct form ‘fusca’. 
The four original species, thus corrected, and with the addition 
of CAMERANO’S two, are as follows: 
Mecodonta. 
Sub-Fam. Salamandrinae — Salamandrina perspicillata. 
Lechriodonta. 
Sub-Fam. Desmognathinae — Desmognathus fusca. 
Plethodon erythronotus 
Spelerpes porphyriticus. 
Spelerpes bilineatus. 
Spelerpes fuscus. 
Of these the only Mecodent represented has a glottis slit and tiny 
lung rudiments, too small to be of the slightest use. As all the other 
lungless forms are Lechriodonts, the case is manifestly one of parallel 
development, there being something in the habit of life of Salamanders 
in general which tends to render lungs of little importance. 
The list of the different lungless genera thus far investigated, 
with the anatomical details of each, is as follows. 
Sub-Fam. Plethodontinae 
Salamandrina. 
This genus contains but one species, S. perspicillata, which was 
investigated in this particular by CAMERANO in 1894. He found a 
much reduced glottis slit which opened into a minute chamber ending 
in two points, the whole representing useless rudiments of trachea 
and lungs. Rudimentary arytaenoid cartilages were also present. 
Investigating a very poor series of cross-sections of Salamandrina in 
my own collection, I was able fully to corroborate CAMERANO. 
In my series I could find the arytaenoid rudiment upon one side 
only, and no trace of other laryngeal or tracheal cartilages. There 
were no laryngeal muscles attached to the arytaenoid rudiments. 
1) For the determination of this species I am indebted to my friend, 
Dr. FREDERICK OrrveLanD Test, of Washington, who compared my specimens 
with those in the National Museum. 
