234 : Scientific Intelligence. 
prominence being given to the remains of od ibe dot The third 
part gives a general view of Paleobotany, and the remainder of 
the work is devoted to Stratigraphical Palconthlogy: The volume 
contains about 400 figures, most of them excellent wood-cuts, 
taken from D’Orbigny’s Cours near de Paléontologie, by 
arrangement with the Cedeaci > that work. 
1 Treatise on Building a Srvichiiontit Stones of Great 
Britain and Foreign Cnunittey : j arranged according to their 
Sabin distribution and mineral character, with rode 
of their application in ancient and modern structure 
DWaARD Hott, M.A., , Director of the ee Surv ey 
of Ireland. pp. 333, 8vo. ‘London (McMillan & Co.). —Mr. Hull has 
believe he is correct in saying it is the first attempt in our lan- 
guage to discuss ce important department of practical geology 
and mineralog a separate treatise. The classification o his 
ee 1 Melaph yre), Lavas ; Part Vv, erpentinous “Rooks "Part 5 
Marble; Part VIL, Alabaster ; Part VUl, The Rarer Ornamental 
Stones; Part IX, Malachite ; ‘Part t X, Calareous group of poe 
ne stones ; Part X , Sandstone group of ee stones ; 
ones. The usc Birosente-"s a large nu umbe v Of i interesting data 
reds es of information on this ares appear not to have been 
consulted by our author, while in general the book shows evidence 
of careful preparation by consultation of authorities. 
12. The History of Balanoglossus and Tornaria ; by ALEXAN- 
DER Acassiz. Quarto with three plates. From the agian . 
the American Academy of Arts and Sciences, vol. ix, p. 
January 14, 1873.—In this very interesting an nd important asin 
r. Agassiz gives us a nearly complete history of the develop- 
ment of the larva long known ae ornaria, and until recently 
remarkable worm Balanoglossus. That Tvrnaria is the larva of 
this or some allied genus, had been rendered very probable by we 
observations of Metschnikoff, published in 1870, as stated by 
Agassiz, but the evidence was not conclusive, for the caplet 
