CONTENTS OF No. 261.— New Series. 



MEMOIRS : page 



The Cytoplasmic Inclusions of the Germ-Cells : Part X. The Game- 

 togenesis of Saccocirrus. By J. Bronte Gatenby, B.A., D.Phil., 

 D.Sc, Professor of Zoology and Comparative Anatomy, Trinity 

 College, Dublin. (With Plates 1-4 and 1 Text-figure) ... 1 



On the Development of the ' Enteronephric ' type of Nepbridial 

 system found in Indian Earthworms of the genus Pheretima. 

 By Kaem Narayan Bahl, D.Sc, D.Phil. (Merton College, Oxford). 

 Plates 5-7 and 8 Text-figures) 49 



The Occurrence of Situs inversus among artificially-reared 

 Echinoid Larvae. By Hiroshi Ohshima, Assistant Pro- 

 fessor in the Department of Agriculture, Kyushiu Imperial Univer- 

 sity, Fukuoka, Japan, (With 3 Text-figures) 105 



Note by Prof. E. W. MacBride on Mr. H. Ohshima's paper . . 149 



The Behaviour of the Golgi bodies during nuclear division, with special 

 reference to Amitosis in D y t i s c u s m a r g i n a 1 i s. By Reginald 

 James Ludford, B.Sc, Department of Zoology and Comparative 

 Anatomy, University College, London. (With 4 Text-figures) . 151 



On the anatomy and affinities of Paludestrina ventres a, 

 Montague. By Guy C. Robson, p.A. (With 12 Text-figures) . 159 



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