PAPERS ON ZOOLOGY AND PHYSIOLOGY 323 
Charleston, where the bottom is rocky. Mr. Charles Finley 
tells me that they are common in the Kaskaskia River at Cooks 
Mill in the northwest part of Coles County, IJIlinois, and not 
far from Charleston. 
Fishermen frequently catch them on their hooks in the 
spring. One taken by the writer on March 23, 1908, had 
swallowed a Brook Lamprey, Lampetra wildert. 
Ambystoma tigrinum (Green), Tiger Salamander. Com- 
mon about Charleston, where it dwells in dark, damp situa- 
tions, like cellars, little used wells or cisterns. Many have 
been brought to the laboratory from such places and com- 
monly from near breeding ponds. 
Breeding occurs in the region in late February or March, 
as soon as it is warm enough to keep open water in the ponds 
for any length of time. The period is made evident by find- 
ing ovoid, gelatinous capsules with their eggs in ponds. Typ- 
ically there are some twenty or thirty eggs together, and the 
whole mass is about three inches in length. The eggs are ex- 
cellent for elementary embryological work. Tadpoles reared 
in the laboratory reached the adult form in late summer. 
Ambystoma microstomum Cope. Small-mouthed Sala- 
mander. Several specimens have been brought to the labora- 
tory. They have all been found in wooded regions about logs 
and brush. 
Desmognathus fusca Raf., Dusky Salamander. (?) In 
August, 1910, two salamander larvae were caught that ap- 
peared to belong to this species, and Dr. Ruthven says that he 
has little hesitancy in referring them to this, but positive iden- 
tification requires adults which have not been found in the 
region. 
Diemictylus viridescens Raf., Green Newt. An example 
of the red form of this species was brought to me by Mr. 
Lee Morgan of Charleston, on September 15, 1906. It was 
found in some fire wood that had been brought in from the 
country, The species is apparently very rare in the region. 
Garman (’92) reports it as “throughout the state.” Hurter, 
('11) finds it in Illinois near St. Louis. 
