t)2 The American Geologist. August, 1893 
unrecognizable mass to be used over again in the manufacture 
of other animals and other plants. She keeps no sepulchral 
urns for the ashes of her dead but scatters them broadcast 
over the earth and ihe waters wherever chance may drop 
them. Only, as it were, when some accident has eluded her 
watchfulness do we find the fossil form. Out of the millions 
of beings that have lived and died one has here and there 
escaped oblivion and remains "a monument more lasting than 
bronze or the towering pyramids" of Egypt. Man} r a fossil 
species is represented by a solitary specimen in some one 
museum, and though others will doubtless some day be dis- 
covered, yet there is no doubt in the mind of every paleon- 
tologist that the number of the finally saved will bear no 
proportion whatever to that of the utterly lost. 
This second discovery was due to the industry and patience 
of another volunteer in the field, Mr. Jay Terrell, of Oberlin, 
O. Picking up one day on the lake shore a small pebble he 
recognized in it the well known structure of bone, and being 
thereby stimulated to search farther he ended b} r the dis- 
covery, in the Cleveland Shale, of a fauna surpassing in ex- 
tent that already found by Hertzer in the Huron. For some 
years, owing to a mistaken conception regarding the stratigra- 
phy, this shale was regarded as lying on the same horizon and 
being the same as the Delaware beds. But this is known to 
be an error and that the beds at Avon Point are in truth in 
the Cleveland Shale is now admitted by all. 
Most of Mr. Terrell's specimens were obtained from the 
cliff on the shore of lake Erie, where the action of the waves 
constantly breaks down and exposes new surfaces. His work 
was prosecuted, sometimes amid water and ice in the early 
spring, with an energy and enthusiasm deserving of the last- 
ing gratitude of palaeontologists. Not a single species from 
the lower horizon has been found here, but Mr. Terrell's re- 
searches have confirmed the results of Mr. Hertzer regarding 
the structure of these gigantic placoderms and added largely 
to their number. Dr. Newberry u-ives in Ids volume on the 
palaeozoic fishes of N. A., 28 species from the Cleveland Shale.* 
*In addition to the 28 species of Dr. N.'s work there is another which 
has apparently by some oversight been placed in the wrong position. 
On p. 70 Callognathus serratus is placed among the fishes of the 
Huron though credited to and belonging to the Cleveland Shale. 
