Personal and Scientific News. 67 
the publications catalogued in the bibliographies are also to be noted. 
(e. g. 1802 to 1888.) 
“In case a bibliography bears no printed title, which often happens 
with such as are appended to special works or memoirs, it will be proper 
to define its subject by means of a phrase én brackets: |....], giving after 
this the complete title of the document in which the bibliography is 
comprised. 
“Publications which, without pretending to take the form of a methodic 
bibliography, contain the detailed history of the study of a question of 
general interest or of a country, are to be mentioned. 
“In order to facilitate the final classification of subjects for the pur- 
pose of printing, the collaborators are requested to prepare their work 
on separate slips.” The Secretary, 
é EMM. DE MARGERIE, 
To Mr. G. K. Gilbert, Member of the Committee for North America. 
PERSONAL AND SCIENTIFIC NEWS. 
PREHISTORIC HorsEs.—The genealogy of the horse has been 
most admirably worked out in various publications, and the fact 
has long been established that the genus originated on the North 
American continent. The question, however, as to whether pre- 
historic man in America had the horse as a contemporary has 
been a disputed point, This question may now be considered set 
at rest by the discovery of a skull of an extinct species of horse 
in strata with human implements. 
This discovery was announced by Prof. E. D. Cope at the last 
annual meeting of the American Association for the Advance- 
ment of Science. A skull of a horse was exhibited to the mem- 
bers by Prof. Cope, who pointed out the characters of the teeth 
and who stated it would be impossible for any one to separate 
the fossil teeth from those of the quagga and zebra if the three 
were all thrown together. In minor characters, such as those of 
the size of the bones, the differences are preceptible. So there is 
no doubt the skull represents an animal different from any now 
living. That it was a horse, however, any one could see. 
The most curious thing about the skull was its condition. The 
frontal bone had been crushed in exactly as we see in the case of 
animals slaughtered for food. The friable bones protecting the 
eye sockets were intact, as were also the long nasal bones. 
Found in the same bed with the skull was a stone hammer that 
bore evident marks of having been fashioned by the hand of man. 
What inference was to be drawn from this? In the first place 
it has been suspected and considered probable that early man on 
this continent had been contemporaneous with a horse, though 
not the present living species, but no direct proof had hitherto 
