70 . Sullivant’s Muscology. 
quartz is rarely found. In its cavities at Black Rock, dog-tooth 
spar sometimes occurs; at the same place, fluid bitumen or petro- 
leum is found, usually filling the cells of the F'avosites.” 
The upper coralline beds of the Falls of the Ohio, include a 
“black stratum,” containing many corals; this is, in all probabil- 
ity, the western representative of these dark colored beds at Black 
With the Seneca limestone, the uppermost bed of the cornife- 
rous formation, terminates upwards the Helderberg series of the 
hical division ; so also is it the last member, in the as- 
pated scale, of the the transition series between the middle and | 
upper division, according to the chronological scale. Here also is 
the close of all the important limestones of the New York sys- 
tem, for the calcareous deposites above are but thin and local in 
their extent. D. D. O. 
repestoe : (To be continued.) t ov hers 
Art. VI.—Musci Alleghanienses, sive Spicilegia Muscorum atque 
Hepaticarum quos in ttinerea Marylandia usque ad Geor- 
giam per tractus montium A. D. mpcccxuiui, decerpserunt Asa 
Gray et W. 8. Sutxivant: (interjectis nonnullis aliunde col- 
lectis:) Concinnavit et erposuit W. 8. Sutuivanr. Fascis I, 
If. Columbus in Ohione, mpcccxty. , : 
Tus beautiful publication, as it may be justly called, although 
not intended for sale, consists of about fifty presentation copies, 
or sets of the specinfens themselves, with printed labels, title- 
pages, and index, prepared at no small labor and expense, and in 
an unusually elegant style, for distribution among the principal 
muscologists abroad, and those most interested in these pursuits 
at home. A work it may with literal propriety be termed, since, 
beside the labor of collection, of which the writer may speak 
from some actual knowledge, the manual preparation, arrange- 
ment, and critical study of the materials, with the subsequent 
journeys that have been required for the sake of rendering cer- 
tain portions more complete, have fully occupied all the zealous 
author’s available time for the two years which have ae 
iow x the ‘plants were gathered. 
