i 
eee: aR a a a 
.1884.] Editors’ Table. 805 
In the fourth premolar there are two opposite crescents in front, 
like those of the true molars, but the posterior part of the crown 
isnot double. The only species, Z. gracilis Cope, is a small ani- 
mal with jaws not larger than those of a hedge-hog (Arimaceus 
europeus, Fig. 11 d)? 
All the specimens of the Periptychide now known, were dis- 
covered by my assistant, Mr. David Baldwin, in New Mexico. 
Not only these, but the eighty species of Vertebrata now known 
from the Puerco epoch, are the results of the untiring, and some- 
times dangerous explorations of this gentleman. Few palzonto- 
logical collectors can show such a record. 
(To be continued.) 
——0: 
EDITORS’ TABLE. 
EDITORS A. S. PACKARD, JR., AND E. D. COPE. 
— In ‘one of its late issues, our esteemed cotemporary, 
Science, advocated editorially the creation of an International 
Scientific Association, which should have its congresses, at intet- 
vals to be determined on, in the different countries of the civilized 
world. 
Various objections may be urged against the organization of 
new scientific bodies, most of whiċh are derivable from a consid- 
eration of the imperfections of those which exist. Should such 
an association be composed solely of persons distinguished for 
actual work done in pure science? or should experts in applied 
Science be admitted to membership? or thirdly, should any per- 
Son interested in science be eligible for membership? On the 
termination of its founders in respect to these fundamental 
Points, the usefulness of such a body would depend. On its 
Probable usefulness would depend the advocacy of many of the 
friends of science. 
The utility of the meetings of scientific workers when properly 
, is generally conceded. The occasional emergence of 
the student from his studio to mingle with others engaged in 
kindred pursuits, has a stimulating and encouraging effect. It 
1 Corr, umber 
as distinguished b i i lar teeth 
: y their superior molar teeth. ‘ 
dhadrituberculate or multituberculate.’’ As some of the extinct marsupials are 
quadri idæ, the above language should be changed so as to read, trituberculate, 
uberculate, multituberculate, or derivative forms, 
