CONTENTS. 



Page 

 Note on the Wombats living in the Gardens of the Zoological 

 Society, by Dr. P. L. Sclater ; On the Functions of the Vessels 

 of Plants, by M. Gris ; The Mode of Development of the Marginal 

 Tentacles in the free Medusoids of some Hydroida, by A. Agassiz; 

 On the Question whether Diatoms live on the Sea-bottom at great 

 Depths, by W. Stimpson, M.D 76—80 



NUMBER LXVIII. 



VIII. Species considered as to Variation, Geographical Distribu- 

 tion, and Succession. By Prof. Asa Gray 81 



IX. On the Species of Chelymys from Australia, with the Descrip- 

 tion of a new Species. By Dr. J. E. Gray, F.R.S. &c 98 



X. Notice of a new Species of Pelomedusa from Natal. By Dr. 



J. E. Gray, F.R.S. &c 99 



XI. Contributions to an Insect Fauna of the Amazon Valley. 

 CoLEOPTERA : LoNGicoRNES. By H. W. Bates, Esq 100 



XII. On the Leaf-Cells of the British Species of Hymenophyllum. 

 By George Gulliver, F.R.S., Professor of Anatomy and Physio- 

 logy to the Royal College of Surgeons 109 



XIII. On the Value of the Distinctive Characters in Amceba. By 



G. C. Wallich, M.D., F.L.S. &c Ill 



XIV. Description of a new Species of Lycosa living in the Island 

 of Madeira ; with some Remarks on Lycosa turentuloides maderiano., 

 Walckenaer. By James Yate Johnson, Cor. Mem. Z.S 152 



New Book .—English Botany ; or Coloured Figures of British Plants. 

 Third Edition. Enlarged, rearranged according to the Natural 

 Orders, and entirely revised ; with Descriptions of all the Species 155 



Proceedings of the Zoological Society 158—166 



" Do Diatoms live on the Sea-Bottom at Great Depths?" by G. C. 

 Wallich, M.D. ; Description of a new Coral (Lithoprimnoa arc- 

 tica), and Remarks upon its Systematic Position, by E. Grube ; 

 On the Crustacea which live in Species of Ascidians, by T. Tho- 

 rell; Characters of a new Species of Sedge-Warbler ( Calamoherpe 

 Newtoni) from Madagascar, by Dr. G. Hartlaub 166 — 1G8 



NUMBER LXIX. 



XV. On the Impregnation in Orchids as a Proof of the two dif- 

 ferent Effects of the Pollen. By Dr. F. Hildebkand, of Bonn ... 169 



