1897.] Geology and Paleontology. 55 
banding of some of the schists is due to interlaminations of igneous 
rocks of different characters. 
Several new occurrences of alnoite are described by Smyth* from near 
Manheim, N. Y. The rock of a small dyke does not differ in any essen- 
tial respect from the rocks described a few years ago. The rock of a 
large dyke is very fine grained on the margin of the dyke, but in its 
interior it is a coarse grained panidiomorphic aggregate of reddish- 
brown mica and serpentine pseudomorphs after olivine, together with 
a little magnetite, apatite and perofskite. Melilite has not been ob- 
served in the rock, but the author thinks that it may have been 
present before alteration set in. 
In the report on the the Mine la Motte sheet of the Missouri Geo- 
logical Survey, Keyes and Haworth’ describe the Archean rocks found 
within the district as granites which pass upwards into prophyries, 
Some of the granites are granular, while others are porphyrtic. In 
composition they are normal. The porphyries are like those of the - 
Iron Mountain district. The acid rocks are cut by intrusions of diabase, 
and of quartz disabase porphyrites. 
In a collection of rocks from the Provinces Kansu, Schensi, Hupe 
and Honan, in China, Steuer” finds granites, hornblende-vogesite, 
melaphyre, serpentine, amphibolite, gneiss, and various schists and 
sediments. 
GEOLOGY AND PALEONTOLOGY. 
Lambdotherium not Related to Palzosyops or the Titan- 
otheres.—The little species Lambdotherium popoagicum of the Wind 
River beds, found contemporary with Paleosyops borealis, has been 
treated by Cope, Earle and others as an ancestral titahothere. A 
more careful examination of the numerous specimens in the American 
Museum shows at once that it bears much closer resemblances to the 
horses, especially in the chisel-shaped incisors, the atlas, the manus and 
A restatement of its definition and principal characters appears to 
be of value. 
8 Amer. Jour. Sci., 1896, Vol. II, p. 290. 
® Missouri Geol. Survey, Sheet Report, No. 4. p. 24. 
10 Neues Jahrb. f. Min., etc., 1896, II, p. 477. 
