CONTENTS. 



Page 



On the Postembryonic Development of the Diptera, by M. H. Vial- 

 lanes ; Development of the Ovum of Melicerta, by M. L. Joliet ; 

 On a Yellow Variety of the Common Eel {AnguUla vtih/oris, FL), 

 by Dr. Heinrich Bolan, of Hamburg ; On the Origin of the 

 Central Nervous System of the Annelida, by Prof. Kleiueuberg ; 

 How Orb-weaving Spiders make the Framework or Foundations 

 of Webs, by the Rev. Dr. H. C. McCook 61—68 



NUMBER L. 



X. On some new Species of Corals. By Beyce Wright, F.Z.S. 



&c. (Plates n., in., & IV.) 73 



XI. Classification of the Dinosauria. By Prof. O. C. Marsh . . 79 



XII. On a small Collection of Lepidoptera from Melbourne. By 

 Arthur G. Butler, F.L.S., F.Z.S., &c '. 84 



XIII. Descriptions of two new Species of Pcqnlio from North- 

 eastern India, with a Preliminary Indication of an apparently new 

 and remarkable Case of Mimicry between the two distinct Groups 

 which they represent. By J. Wood-Mason, Deputy Supeiiutendent, 

 Indian Museum, Calcutta, on Special Duty with the Government of 

 India 103 



XIV. Contributions to the Knowledge of the Amcebce. By Dr. 

 August Gruber. (Plate IX.) 106 



XV. Contributions towards a General History of the Marine Poly- 

 zoa. By the Rev. Thomas Hincks, B.A., F.R.S. (Plate V.) . , 116 



XVI. Description of a new Species of the Homopterous Genus 

 Aphcpna from Sumatra. By Arthur G. Butler, F.L.S., F.Z.S., &c. 127 



iV>M'5ooAs;— The Zoological Record for 1880 (vol. xvii.). Edited 

 by E. C. Rye. — Zoologischer Jahresberioht fiir 1880. Redigirt 

 von Prof. J. Vict. Carus. — Proceedings of the Bristol Natu- 

 ralists' Society. New series, vol. iii. pt. ii. (1880). AlsO', new 

 series, vol. ii. "(1877-8-9). Flora [recent] of the Bristol Coal- 

 field. Edited by J. W. White. Part I. ThalamifloriB.— Pro- 

 ceedings and Transactions of the Nova-Scotian Institute of 

 Natural Science of Halifax, Nova Scotia. Vol. v. part iii. for 

 1880-81 129—133 



On the Origin of the Spermatozoids in the Hydroids, by M. A. de 

 Varenne ; On the Phenomena of Division in Eiic/lypha alveolata 

 and the Monothalamous Rhizopods in general, by Dr. Aug. 

 Gruber; The Mediterranean Species oi FieraKfer, by Prof. C. 

 Emery ; Mode of Capture of Lizards in Southern Europe, by Dr. 

 T. Eimer ; Note on some obscure Points in the Organization and 

 Development of the Echiiwrhyncln, by M. Meguin 133—140 



