CONTENTS OF No. 158.-New Series. 



MEMOIRS : 



PAGE 



Tlie Adhesive Tentacles of Nautilus, with some Notes on its Peri- 

 cardium and Spermatophores. By Arthur Willey, D.Sc. (With 

 Plate 11) 207 



On some Modifications of Structure subservient to Respiration in 

 Decapod Crustacea which burrow in Sand ; with some Remarks on 

 the Utility of Specific Characters in the genus Calappa, and the 

 description of a new species of Albunea. By Walter Garstang, 

 M.A., Fellow and Lecturer of Lincoln College, Oxford. (With 

 Plates 12—14) 211 



Notes on the Anatomy of Sternaspis. By Edwin S. Goodrich, B.A., 

 Assistant to the Liuacre Professor, Oxford. (With Plates 15 

 audlG) 233 



On the Relation of the Arthropod Head to the Annelid Prostomium. 

 By Edwin S. Goodrich, B.A., Assistant to the Linacre Professor, 

 Oxford 247 



On the Development of the Californian Hag-fish, Bdellostoma 

 Stouti, Lockington. By Bashforp Dean, Ph.D., Columbia 

 College, N.Y. (Preliminary Note.) (With Plate 17) . . 269 



On the Diplochorda.— 1. The Structure of Actinotrocha. 2. The 

 Structure of Cephalodiscus. By A. T. Masterman, B.A., B.Sc, 

 Lecturer and Assistant Professor of Natural History in the Uni- 

 versity of St. Andrews, N.B. (With Plates IS— 26) . . 281 



