1890.] Geology and Paleontology. 1067 
We know enough of the cruel Spanish systems of oppression and 
barbarities. The Spaniards were compelled on the r5th of Septem- 
ber, 1821, after some struggle with the natives of Central America, to 
resign their assumed rights over that country and its people. 
Central America divided itself politically into the republics of Hon- 
duras, Guatemala, Salvador, Nicaragua, and Costa Rica, all of which 
abolished slavery as one of their first acts. Honduras, a constitutional 
republic, is at the present time in a very prosperous condition. Its 
doors are opened for commerce, and its coasts and interior offer ample 
rewards for the industrial enterprises of man. The wheel of time, 
producing changes, is never at rest. M. J. R. FRITZGAERTNER. 
GEOLOGY AND PALEONTOLOGY. 
On a New Dog from the Loup Fork Miocene.—AELURODON 
COMPRESSUS sp. nov. Represented in my collection by asingle mandibu- 
lar ramus of the left side, and by two rami in the collection of the 
Museum of Comparative Zoology of Cambridge. The latter have 
been referred by Professors Scott and Osborn to the Ae. hyaenoides 
Cope (Bulletin Mus. Compar. Zoology, 189o, December), but I 
find on direct comparison with the type that the species is different. 
When the heel of the inferior sectorial is placed in position on the first 
tubercular superior molar of the Ae. hyaenoides, the second superior 
tubercular of the latter does not reach the second inferior tubercular 
of the Ae. compressus ; and the posterior border of the superior canine 
marks the middle of the penultimate inferior premolar of the latter. 
The canine in the Ae. compressus is rather small, while the sectorial 
and first tubercular are large. The fourth premolar is one-rooted, and 
the third has two distinct roots, and is nearly as large as the second. 
The crowns of these teeth are not preserved in the specimen. The 
first inferior premolar is not so robust as in the Ae. sevus Leidy and 
other species, but is more compressed. It has a strong posterior 
cutting lobe, and a low posterior basal cingulum. No anterior basal 
cusp or cingulum. The heel of the sectorial is as wide as long, and is 
half as long as the blade. The anterior border of the latter overlaps 
a little the heel of the first premolar on its inner side. The borders 
of the heel are of equal elevation. Roots of first tubercular divergent. 
Root of second tubercular compressed and situated on the oblique 
base of the coronoid process. The ramus mandibuli is rather shallow 
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