CONTENTS Introduction............... 1 Fossil Proboscidea and the stratigraphy of the Pleistocene in Southeastern Asia. 3 Order Proboscidea............. 9 Suborder Elephantoidea.......................... 9 Family Elephantidae............ 9 Subfamily Stegodontinae........... 9 Stegolophodon stegodontoidesPilgrim)......... 9 Stegodon insignis (Falconer et Cautley)........ 13 Stegodon trigonocephalus Martin......... 17 Stegodon hypsilophus Hooijer.......... 86 Subfamily Elephantinae........... 89 Archidiskodon celebensis Hooijer......... 89 Archidiskodon planifrons (Falconer et Cautley)...... 92 Stegoloxodon indonesicus Kretzoi species inquirenda..... 104 Elephas hysudricus Falconer et Cautley........ 107 Elephas hysudrindicus Dubois.......... 110 Elephas maximus Linnaeus.......... 132 Literature cited.............. 138 Explanation of the plates............ 14З INTRODUCTION The fossil Proboscidea from Java that form the main subject of the present paper were brought together during the closing decade of the last century by Eug. Dubois and his assistants in search of Pithecanthropus. Fossil proboscideans had long been known to occur in the island ; as a matter