CONTENTS OF No. CXXXIV.-New Series. 



MEMOIRS: 



PAGE 



On the Development of the Optic Nerve of Vertebrates, and the 

 Choroidal Fissure of Embryonic Life. By Richaed Assheton, 

 M.A., Demonstrator of Zoology in the Owens College. (With 

 Plates XI & XII) 85 



The Larva of Asterias vulgaris. By George W. Field, M.A. 

 (With Plates XIII, XIV, & XV) 105 



The Development of the Genital Organs, Ovoid Gland, Axial and 

 Aboral Sinuses in Amphiura squamata; together with some 

 remarks on Lud wig's Haemal System in this Ophiurid. By E. W. 

 MacBkide, B.A., B.Sc, Scholar of St. John's College, Cambridge. 

 (With Plates XVI, XVII, & XVIII) . . . .129 



A New English Genus of Aquatic Oligochaeta (Sparganophilus) 

 belonging to the Family Rhinodrilidse. By W. B. Benham, 

 D.Sc.(Lond.), Aldrichian Demonstrator of Anatomy, Oxford. (With 

 Plates XIX & XX) 155 



