324 KANSAS UNIVERSITY SCIENCE BULLETIN. 
lished a list! of the vertebrates known at that time from these 
shales. This list included twenty-five species of fishes and a 
single species of Amphibia, Amphibamus grandiceps Cope, 
which was all that was known of the higher vertebrates from 
these beds at that time. Since the publication of Eastman’s 
essay the writer has described? an additional species from 
Mazon Creek, Micrerpeton caudatum. This form was shown 
to be an example of the order Branchiosauria. It was the 
first definite evidence of the occurrence of this order of Am- 
phibia in America, or, in fact, in the Western Hemisphere. 
The next year the writer described (Amer. Natl., XLIV, 
June, 1910, p. 367) and figured another branchiosaurian as 
Eumicrerpeton parvum, from these beds; and the following 
year he described (Proc. U. S. Natl. Museum, XL, p. 429-433, 
1911) and figured further remains of the same species and 
described a new microsaurian as Amphibamus thoracatus. 
There have been, thus, up to the present time, four 
species of Amphibia described from the Mazon Creek shales. 
These four species are represented by seven specimens. 
The type of Amphibamus grandiceps Cope was destroyed by 
fire, but there is an excellently preserved specimen of this 
species in the collection of Mr. L. E. Daniels, of La Porte, Ind. 
Other examples of the fossil Amphibia of Mazon Creek which 
have come to the writer’s notice are specimens, representatives 
of the Branchiosauria and the Microsauria, in the collection of 
Mr. R. D. Lacoe, now the property of the U. S. National Mu- 
seum. This small but highly interesting collection has re- 
cently been loaned the writer for study by Mr. Charles W. 
Gilmore. This was the sum total of Mazon Creek Amphibia 
known to the writer until some months ago. In November of 
1909 a collection of nodules containing Amphibia was loaned 
the writer for study through the courtesy of Doctors Eaton 
and Schuchert, of Yale University. This lot consists of ten 
individuals, representing seven genera and eight species, all 
of which, save one, are regarded as unknown and have been 
described as new. This is an immense addition to our knowl- 
edge of the amphibian fauna of the Mazon Creek shales and 
adds much to our knowledge of the diversity of structure dis- 
played by the Amphibia of the Carboniferous. 
The forms described below are entirely unlike any of the 
1. Eastman, C. R., Journ. Geol., vol. 10, p. 535, 1902. 
2. Moodie, Roy L., Journ. Geol., vol. 17, p. 39, 1909. 
