CONTENTS OF No. 166.-New Series. 



MEMOIRS 



Oil tlie Development, of the Parietal Eye and Adjacent. Organs in 

 Sphenodou (Hatteiia). By Akthur Dendy, B.Sc, F.L.S., Pro- 

 fessor of Biology in tiie Canteibury College, University of New 

 Zealand. (With Plates 11—13) . . . . .111 



The Molluscs of the Great African Lakes. — III. Tanganyikia rufo- 

 filosa, and tlie Genus Spekia. By J. E. S. Moore. (With Plates 

 14—19) 155 



The Molluscs of the Great African Lakes. — IV. Nassopsis and 

 Bythoceras. By J. E. S. Moore. (With Plates 20 and 21) . 187 



Further Study of Cytological Changes produced in Drosera. By 

 Lily H. Huie, Physiological Laboratory, Oxford. (With Plate 22) 203 



Remarks on some Recent Work on the Protocliorda, with a Con- 

 densed Account of some Fresh Observations on the Entero- 

 pneusta. By Arthur Willey, M.A., O.Sc. . . . 223 



