; 
a 
Description of a new Species of Torpedo. 165 
An important problem still remains to be solved with regard to the 
mineral lands of the west. We have seen that the metallic veins so 
productive in the thick beds of the upper magnesian limestone of Iowa 
and Wisconsin, dwindle away on reaching the underlying thin layers 
of shell limestone.. Now the question for solution is: do these mineral 
veins, when they reach the underlying magnesian limestone, again ex- 
pand and become productive ? 
Such are the geological formations of the beautiful valley of the Ohio, 
projected by nature on a scale of grandeur commensurate with the vast 
territory, the mighty vegetation, the majestic rivers, the gigantic forests, 
and the wide expanse of trackless prairie, that characterize this magni- 
ficent region of the west. 
~ Dr. Owen concluded his remarks by a series of queries intended to 
draw the attention of other geologists to some points in western geology 
which still demand investigation. 
The hour of 6 having arrived, the Association adjourned. 
‘The Chair reminded the meeting that Mr. Emerson would 
favor the Association and the public with a lecture, on the impor- 
tance of natural history as a branch of common education, at 
74 o’clock this evening. 
[Our engagements to various dkrcitindinite forbid the contin- 
uation of these “Proceedings,” and we are reluctantly compelled 
to postpone the remainder to our October No.—Eps. Am. Jour. ] 
Arr. XVII. “Description of anew species ig Tupelo ae D. 
Houmenreys Storer, M. D.—with a plate. - 
[Read before the American: Academy a Arts and Roem April 25th, 1843.] 
In the January number of she ‘American Journal ‘of Science 
and Arts, | made a slight reference to a species of Torpedo which 
had been taken a few weeks previously upon the coast of Massa- 
chusetts. ‘The description of a species captured on the coast of 
Ireland, published by William Thompson, Esq., Vice President 
of the Belfast Natural History Society, in the Annals of Natural 
History, answered so well to my specimen, that I was led to sup- 
pose it must be the nobilana, Buonaparte. When however I 
carefully compared, with mine, the description and figure of the 
foreign species, contained in the second edition of Yarrell’s Brit- 
ish Fishes, I found no slight differences in the form of the disk 
of the body—in the size of the pectoral and caudal fins, and in 
