819. THE SECOND ADDITION TO THE SILURIAN TRILOBITE FAUNA OF YOKOKURA-YAMA, SHIKOKU, JAPAN

Abstract

Nine species of trilobites including six new species and two new subspecies from Mt. Yokokura are described in this article. A new genus, Ichiyamella, is instituted on Ichiyamella subglobula, sp. nov. Besides this genus Japonoscutellum and Apolichas are indigenous to Japan or Eastern Asia. Some notes are given on the Scutelluidae, Meroperixinae, Illaenidae, Goldillaeninae, Sphaerexochinae, Dindymeninae and the Lichidae in addition to Sphaerexochus, Dindymene and Dicranopeltis and Dindymene (?) megacranidia.