. The age of mammals in Europe, Asia and North America. Mammals, Fossil; Paleontology. OLIGOCENE OF EUROPE, NORTH AFRICA, AND NORTH AMERICA 215 It is striking that no trace of monkeys has been found; in fact, there is every evidence that these animals disai)poared from America at or before the close of tlie Eocene. The small, triangular teeth of Lepto- chcerus, formerly referred to the primates by INIarsh and Cope, now prove to belong to a primitive surviving artio- dactyl family (Leptochoerida?). Beside the leptochoerids the artioclactyls include the giant pigs or entelodonts, and pec- caries
. The age of mammals in Europe, Asia and North America. Mammals, Fossil; Paleontology. OLIGOCENE OF EUROPE, NORTH AFRICA, AND NORTH AMERICA 215 It is striking that no trace of monkeys has been found; in fact, there is every evidence that these animals disai)poared from America at or before the close of tlie Eocene. The small, triangular teeth of Lepto- chcerus, formerly referred to the primates by INIarsh and Cope, now prove to belong to a primitive surviving artio- dactyl family (Leptochoerida?). Beside the leptochoerids the artioclactyls include the giant pigs or entelodonts, and pec- caries or dicotylids, the foreign anthracotheres, and the much more numerous and varied native oreodonts. Most important of all, the hypertragulids appear, typified by the diminutive Hypertragulus and Leptomeryx. The former (Hypertra- guliis) bears some resemblance to the chevrotains (Tragidus) of southern Asia. Matthew's recent restudy ^ of Leptomeryx, a member of this family, brings. Fig. 103. — Skull of the Lower Oligocene titano- there Brontotherium gigas (male). In the American Museum of Natural History. After Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Osborn, Henry Fairfield, 1857-1935. New York, The Macmillan Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectpaleontology, bookyea
