CONTENTS OF No. 147-New Series. 



MEMOIRS 



PAGE 



On the Variation of the Tentaculocysts of Aurelia aurita. By 

 Edward T. Browne, B.A., University College, London. (With 

 Plate 25) 245 



On the Structure of Vermicnlus pilosus. By E. S. Goodrich, 

 F.L.S., Assistant to the Linacre Professor, Oxford. (With Plates 

 26—28) 253 



On the Mouth-parts of the Cypris-stage of Balanus. By Theo. T. 

 Groom, P.Z.S., late Scholar of St. John's College, Cambridge. 

 (With Plate 29) 269 



A Study of Coccidia met with in Mice. By J. Jackson Clarke, 

 M.B. Lond. (With Plate 30) 277 



Observations on Various Sporozoa. By J. Jackson Clarke, M.B.Lond. 

 (With Plates 31— 33) 287 



A Revision of the Genera and Species of the Branchiostomidse. By 

 J. W. Kirkaldy. (With Plates 34 and 35) . . 303 



Sedgwick's Theory of the Embryonic Phase of Ontogeny as an Aid to 

 Phylogenetic Theory. By E. W. MacBride, B.A., Fellow of St. 

 John's College, Cambridge ; Demonstrator in Animal Morphology 

 to the University of Cambridge ..... 325 



