CONTENTS OP No. 264— New Series. 



MEMOIBS : page 



The Nature of certain Ovum-like Bodies found in the Seminiferous 

 Tubules. By F. A. E. Crew and Honor B. Fell. From the 

 Animal Breeding Research Department, University of Edinburgh. 

 (With Plates 18-23) 557 



Glossobalanus marginatus, a new species of Enteropneusta 

 from the North Sea. By Alexander Meek. (With 14 Text- 

 figures) 579 



Studies on Insect Spermatogenesis. V. On the Formation of the Sperm 

 in Lepidoptera. By Robert H. Bowen. From the Department 

 of Zoology, Columbia University. (With Plates 24-26) . . . 595 



On the Biology and Structure of the Larvae of Hydrophilus 

 car aboides, L. By E. N. Pavlovsky, M.D., D.Sc, Professor 

 of Zoology at the Military Academy of Medicine, Peti'ograd. 

 With Plate 27 and 16 Text-figures) 627 



A further Account of the Spermatogenesis of Lice. By H. Graham 

 Cannon. (With 1 Text-figure) 657 



Cannibalism in Amoeba vespertilio (Penard). By Geoffrey 

 Lapage, M.Sc, M.B., Lecturer in Zoology, The Victoria Univesity 

 of Manchester. (With Plates 28, 29, and 3 Text-figures) . . 669 



Mr. Milford, Oxford University Press, Amen Corner, London, B.C. 4, loill be glad to 

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