Supposed New Mineral Species. 357 
was said to be not uncommon ; little Columbian owl, Columbia riv- 
er; ‘I'engmalm’s owl, near Bangor ; violet-green swallow, Rocky 
Mountains ; rough winged. swallow, Louisiana ; Rocky Mountain 
fly-catcher, North California; and Townsend’s Ptilogonys, Colum- 
bia river. The proportion will be seen to be very large, being 
no less than ten out of seventy species described. 
But we have already extended our article too far, and must 
take leave, at least for the present, of a subject so replete with 
interest. We have only to add, that if the residue of the publi- 
cation shall equal the numbers now issued, with especial pains 
taken to secure the accuracy of the coloring of the several plates, 
the present work will without exception be the most splendid 
one on natural history that has yet been published in the country. 
Art. XI—On a supposed new Mineral Species ; by Cuarues 
Urnam Sueparp, M. D., Prof. of Chemistry in the Medical 
College of South Carolina. 
Tue mineral here described, is one with which mineralogists 
have, to a certain extent, been acquainted for several years. 
From a list of localities, by Dr. JosepH Barrarr, prepared in 
1824, and published in the 9th volume of this Journal, (pp. 39— 
42,) it appears to have been first discovered in 1820, at Phillips- 
town, Putnam county, New York; and was from that time until 
very recently, regarded, in common with the other varieties of 
the same substance hereafter to be mentioned, as Sphene. 
second locality of the mineral was made known by Dr. A. F. 
Homes, of Montreal about eight years ago, who obtained it in 
considerable abundance from Grenville, in Canada. 
My attention was first directed to a peculiarity in the cleavages 
of the Grenville specimens, in the year 1834. I observed 
they afforded an oblique rhombic prism, whose lateral faces in- 
clined to each other, according to measurements with the com- 
mon goniometer, under angles of about 123° 30’. The fact ap- 
peared to me of sufficient interest to be mentioned in my Trea- 
- tise on Mineralogy, and I accordingly introduced it in the form of 
a note, under Sphene, (Vol. I, part 2nd, p. 201.) 
In a letter from H. J. Brooxe, Esq., dated London, May, 
1837, (accompanied by a box of minerals,) my attention was di- 
Vol. xxx1x, No, 2.—July-September, 1840 46 
