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BULLETIN

OF THE

AMERICAN MUSEUM OF NATURAL

HISTORY.

Volume IV, 1892.

NEW YORK:
PUBLISHED BY ORDER OF THE TRUSTEES.

1918 92.

COMMITTEE OF PUBLICATION.

R. P. WHITFIELD.

J. A. ALLEN. HENRY FAIRFIELD) OSBORN.

JAMES TERRY. William BEUTENMÜLLER.

EDITOR OF BULLETIN.

J. A. Allen.

LIST OF ILLUSTRATIONS.

Cuts.

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....... 121

Diagram of the tuberculo-sectorial stage of Mammalian molars.........
The primary cusps of an Ungulate (Perissodactyl-Artiodactyl) molar......
The secondary cusps of an Ungulate molar. ...................
Left lower jaw of Patriofelis ulta ........
Series of types showing the evolution of the sectorial molar.
Lower jaw and crown view of teeth of Anaplomorphus homunculus
The homologies of molar cusps in Felidae .............
Type specimen of Ambloctonus sinosus.
Right manus of Oxyæna lupina........
Type specimen of ? Dissacus (Pachyæna) leptognathus......
Molars of Pachyæna gigantea and P. ossi fraga. ............
Crown view of superior molars of Pachyæna gigantea.
Lower jaw and crown view of upper molars of Anacodon ursidens
Right fore foot of Coryphodon... ........ ............
Left hind foot of Coryphodon anax.....

122 Molars of Systemodon semihians and Tapirus indicus...

..... 124 Skull and lower jaw of Systemodon tapirinus .... Feet of Leptodon calciculus. ... Manus of Palæosyops borealis..... Morphology of an upper and lower molar of Coryphodon.

.. 154 Comparative view of second and third upper molars of Coryphodon...... Barb from breast of Ptiloxena atroviolaceus... Barb from breast of Dives sumichrasti......

........ 308 Portion of skull of Capromys columbianus.......

.. 314 Right upper molar of Capromys columbianus......

315 Lateral view of skull of Protoceras celer,

· 352 Top view of skulls of Protoceras celer, ở and $. ...

.: 355 Anterior view of skull of Protoceras celer, é ......

357 Front view of manus of Protoceras celer......... Front view of pes of Protoceras celer............

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Plate I.-Map showing the distribution and areas of intergradation of Quiscalus

aneus and Q. quiscula. " II.- Map showing the distribution of the North American forms of

Colaptes and areas of intergradation between C. auratus and C.

ca fer. "III.-Skulls of Perognathus merriami and P. flavus. " IV.-Skull and dentition of Palaonictis occidentalis. Plates V-VIII. ---Maps showing lise areas of North America.

" IX-XVI.-Illustrations of Insect-galls.

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