CONTENTS OF No. 167.-New Series. 



MEMOIRS : 



PAGE 



The Structure of Xeuia Hicksoni, iiov. sp., witli some Observa- 

 tions on Heteroxeiiia Elizabethse, KoUiker. By J. H. Ash- 

 worth, D.Sc.(Lond.), Demonstrator in Zoology, Owens College, 

 Manciiester. (With Plates 23— 27) . . . .245 



Notes on the Balrachiaus of the Paraguayan Chaco, with Observations 

 upon their Breeding Habits and Development, especially with regard 

 to Phyllomedusa hypochondrialis. Cope. Also a Description 

 of a New Genus. By J. S. Bddgett, Trinity College, Cambridge. 

 (With Plates 28— 32) 305 



The Development of Echinoids. Part I. — The Larvae of Echinus 

 miliaris and Echinus esculentus. By E. W. MacBride, 

 M.A., Professor of Zoology in McGill University, Montreal. (With 

 Plate 33) . . " 335 



Hydroids from Wood's Hell, Mass.: Hypolytus peregrinus, a 

 New Unattached Marine Hydroid; Corynitis Agassizii and its 

 Medusa. By L.- Mtjrbach. (With Plate 34) . . . 341 



Note. — Arhynchus hemignathi. By Arthur E. Shipley . . 361 



