12 Elevations in Ohio and the adjacent States. 
instituted in any particular family; nor for employing any but 
the anterior name, when two or more names have been imposed 
upon the same genus of animals. 
This may be thought, at first glance, but a small work; and 
yet the author has already catalogued, upon the above plan, up- 
wards of seventeen thousand names. Doubtless, many more 
will be hereafter found, in works to which he has not yet had 
access. No unpublished names have been introduced. 
M. Agassiz has expressed his views, in his introduction, with 
regard to some of the laws of nomenclature, which, when com- 
pared with those laid down in the Report just noticed, accord in 
the main with our own. For instance, he says he does not think 
it judicious to discard barbarous names, now in use; as in. that 
case nearly a thousand would come to be rejected, and as many 
others substituted. Nor would he reject all words doubly em- 
ployed. 'To show the absurdity of too great strictness in the 
laws of nomenclature he states, that he knows of more thana 
thousand names, common to genera in botany and zoology ; and 
says he prefers that some one more solicitous for such eclat than 
himself, should undertake to substitute other names and aflix their 
superbus MII. 
It is the first grand step towards extrication from future con- 
fusion in nomenclature, that we have the generic appellations 
thus before us under one glance; the next will be to construct 
tables of specific names upon the same plan, and this we hope will 
ere long be attempted, in some of the classes at least. We agree 
with the publishers of the ‘‘Nomenclator Zoologicus,” that this 
is a work indispensable to all zoologists and paleontologists. 
Arr. Il.—A Statement of Elevations in Ohio, with reference to 
the Geological Formations, and also the Heights of various 
points in this State and elsewhere; by Cuartes WHITTLESEY, 
Esq. of Cleveland, Ohio. 
In giving the levels for Ohio, it should be understood that they 
have been taken with reference to Lake Erie, as a zero. The sur- 
face of Lake Erie has generally been considered as five hundred 
and sixty four feet above tide-water at Albany; see the Report 
for Michigan, 1839-40. The topographer of that State, S. W. 
