Johns Hopkins University, Baltimore.

The contents of this volume are, 1, An undescribed Acranate by E. A. Andrews; 2, Contributions to the Embryology of Chiton, by Maynard M. Metcalf; 3, The formation of the so-called Cypress-knees on the Roots of the Taxodium Distichum, by John P. Lotsy; 4, On the Origin and Development of the Stichidia and Tetrasporangia in Dasya Elegans, by B. W. Barton. This volume is edited by Prof. H. N. Martin and Prof. William K. Brooks.