Geology and Mineralogy. 75. 
pelled to endorse the opinion expressed in the last-mentioned 
review, that “to all who are interested in the study of glacial 
geology we can recommend this treatise as the most important 
contribution on the subject which has appeared of late years.” 
J. MCG. 
4. Dinosaurian of the Laramie or Lignitic group.—In the 
American Naturalist for July, 1883 (p. 774), Professor Cope has 
a paper on “the Structure and Appearance of a Laramie Dino- 
saurian,” from a nearly perfect skeleton, found by Messrs. Wort- 
a species closely related to the Hadrosaurus Foulkei. 
States that the total length of the skeleton is 38 feet; that of the 
skull 1:18 meters. The skull is much “like that of a goose.” The 
dentition is remarkable for its complexity and for the difference 
between the superior and inferior series; it includes more teeth 
than the Hadrosaurus, there being 630 in each maxillary bone, 
and 406 in each splenial bone, making in all 2,072. Dermal or 
corneous structures have left distinct traces in the soft sandstone 
about the end of the beak-like muzzle. The affinity of the Dino- 
saurs to birds is confirmed by the skeleton, but Professor Cope 
remarks that it is empirical rather than essential and is confined 
to a few points, as the form and position of the vomer, the large 
development of the premaxillary bone and the toothless character 
of this bone and the dentary. P 
5. Wyoming Historical and Geological Society.—This society 
has recently published a list of Paleozoic fossil Insects of the United 
States and Canada, with full references and synonymy, by R. D. — 
Lacor, 20 pp. 8vo. 
ecimen weighed 
but this may be due to the impurities in the veining. Fr 
~ ~ 
