48 The American Geologist. January, 1900 
of 6 m m. and a width of 6.1 m m. Another good specimen 
has a width of 4 ni ni. and a length of 3.5 ni ni. 
Obolella spl 
Two small forms are probably to be regarded as Obolella. 
They are not, however, sufficiently well preserved for identi- 
fication. They are more convex than O. atlantica, but are 
possibly young individuals of that species. They have a nearly 
circular outline with a diameter of 2 m m. 
Urotheca pervetus Matthew. 
Urotheca pervetus Matthew. Nat. Hist. Soc, N. Brunswick, Bull. 
XVIII, p. 191, pi. I, fig. 8. 
One specimen has been found resembling this form. It is 
somewhat flattened, but retains the general outline. It has 
a length of 14.5 m m. It has a maximum diameter of 2.2 
m m. and tapers to an apparent diameter of 1.9 m m. at the 
end of the fragment. At its larger end it shows annulations 
somewhat faintly. 
Orthotheca cylindrica Grabau MSS. 
This is a small individual, having a diameter of i m m. It 
is regarded by Grabau as identical with the types of the species 
to be described by him shortly. It was found in a frag- 
ment derived not from the beds containing the above fossils, 
but from the finer grained shales associated with them. It 
is interesting as being the first identified fossil found at this 
locality. 
In addition to the above a number of forms have been 
found which have not, as yet, been identified. One fragment 
shows markings Avhich appear to represent a trail of the Nereis 
type. This trail-like form has an apparent width of 12 m m. 
and is marked by wavy transverse lines about .5 m m. apart, 
which curve abruptly to form acute angles with the margins. 
Another form, which is particularly puzzling, is shown in 
outline below\ It was regarded at first sight as a trail. It, 
however, tapers slightly, as shown in the drawing, and flares 
suddenly at its larger end. It appears, moreover, that it is 
not a mere impression, but has a definite thickness. Were it 
not for its size, one w'ould be inclined to call it the genal 
spine of a trilobite. 
