aoe, ROY L. MOODIE 
from the temporal canal, and on the other quite horseshoe- 
shaped and nearly connected with the temporal canal. 
It will be seen from an examination of the figures (1-4) that 
the parietal foramen is large and clearly marked. It has always 
been assumed that this opening was for the pineal organ. There 
are surely some fortunate casts of the cranial cavity of an extinct 
amphibian in some of the extensive collections of fossil verte- 
brates, which will show that part of the brain; and it is to be 
hoped that some one will describe the condition of this part of 
amphibian anatomy in its relation to the skull. 
Micrerpeton caudatum® was the first branchiosaurian described 
from the western hemisphere and the species was found to be 
especially interesting in the preservation on the tail of two dark 
lines which have been interpreted as dorsal and median lateral 
lines.? This observation has been confirmed on additional mate- 
rial (fig. 5) from the same deposit on three specimens which have 
been assigned to another genus, of which the writer!’ has already 
described the anatomy. 
A reconstruction of the form is here given (fig. 6), the median 
and dorsal lateral lines of the tail being indicated as dark bands. 
In the description of Micrerpeton the writer!! discussed the 
presence of small scales on the side of the tail impression, and 
stated that the lateral line organs seemed to have been located 
under pigmented scales, to which was due the preservation of 
the form of this series of organs. The material on which the 
reconstruction is based consists of three unusually well-preserved 
specimens (fig. 5), of a small amphibian less than two inches in 
length. All three specimens show a nearly complete preservation 
of the alimentary canal, the pigementum nigrum of the iris and 
choroid, the form of the body, something of the skeleton, and the 
lateral line organs, above mentioned. The form ! is very closely 
8 Jour. Geol., vol. 17, pp. 39-52, figs. 1-6, 1909. 
9 Jour. Morph., vol. 19, p. 517, figs. 4-5, 1908. 
10 Kansas Univ. Sci. Bull., vol. 6, no. 2, p. 331, pl. 6, fig. 2, 1913; Amer. Natl., 
vol. 44, p. 367, figs. 1-4, 1910. 
4 Jour. Geol., vol. 17, p. 49, fig. 6, 1909. 
2 Fortschritte d. naturwissenschtl. Forschung, Halle, Bd. 8, p. 66, fig. 35, 
1913. 
