242 Scientific Intelligence. 
out of the boulder drift; that a re-emergence took place, and a 
pause, when the inferior peat and forest beds were formed; that 
a second subsidence took place, denuding these peat beds, and 
making the Formby and Leasowe marine beds; that an upward 
movement succeeded, and then grew the forest trees, remains of 
T. M. Brewer, of Boston, and Mr. R. Rid 
promised by December Ist, by Messrs. Little, Brown o-5: Sa 
with such authors, and Dr. Baird at the head, the work will 
assuredly be one of high merit, and just what is needed. The 
American birds, in most cases of life size. The publishers state 
that two editions will be issued, one with colored, the other with 
uncolored, illustrations. 
15. Fossil Oephalopods of the Museum of Comparative Zoology + 
Embryology ; by AupuEevs Hyarr. Bulletin of the Museum, vol. 
ii, No. 5.—This memoir contains the results of a careful investr 
gation with respect to the embryology and structure of ammonites 
and related cephalopods, by a study of the shell in its different 
stages of development, and also by a comparison of its characters 
with those of the living nautilus, : 
16. Boston Society of Natural History.—Number 3 of part 1 
of vol. iii, of the Memoirs of this Society, recently issued, com 
tains an elaborate memoir by Elliott Coues, M.D., on the Osteo 
logy and Myology of Didelphys Virginiana, with an appendix 0? 
its brain, by Jeffries Wyman. 
ay rescent Salt obtained twelve miles from Denver, Colorado, 
contains, according to P. Frazer, Jr., sulphate of soda, 63°5 x. 
cent., sulphate of lime 9°70, water 21°88, chloride of sodium, SU® 
phate of magnesia, &c., 4°55.—Hayden’s Report on Wyoming, 
1871, p. 187. 
IIt. Asrronomy. Loe 
1. Annals of the Observatory of Harvard College, v0h ide, 
and G. P. Bond. The first. series was published in vol. i, part i 
and included the places of 5500 stars; thesecond, in vol. ii, part ™ 
