"' 7 



CONTENTS OF VOL. III. 



[FOURTH SERIES.] 



NUMBER XIII. 



Page 



I. On the Structure of the Diatomaceous Frustule, and its Genetic 

 Cycle. Bv John Denis Macdonald, M.D., F.R.S., Staff-Surgeon, 

 R.N. (Plate III.) 1 



II. On Physalia and certain Scombroid (?) Fish which are fre- 

 quently associated with it in Tropical and Subtropical Seas. By G. 



C. Wallich, M.D., F.L.S 8 



III. Description of some new Species of Fossil Ferns from the 

 Bournemouth Leaf-bed. ~By A. Wanklyn, B.A., Sidney Sussex 

 College, Cambridge. (Plate I.) 10 



IV. Investigation of the Freshwater Crustacea of Belgium. By 

 Felix Plateau. (First Part.) 12 



V. Description of a Siliceous Sand-Sponge found on the South- 

 east Coast of Arabia. By H. J. Carter, F.R.S. &c 15 



VI. Descriptions of several new Species of Nvmphalidian Rhopa- 

 locera. By Arthur G. Butler, F.L.S.,F.Z.S":, &c. (Plate IX.). . 17 



VII. Descriptions of some new Genera and Species of Alcvonoid 

 Corals in the British Museum. By Dr. J. E. Gray, F.R.S., V.P.Z.S., 



&c 21 



VIII. On a new Genus of Gorr/omdfp from Portugal. By Edward 

 Perceval Wright, M.D., F.L.S., Professor of Zoology, Trinity 

 College, Dublin 23 



IX. On Rhinops vitrea, a new Rotifer. By C. T. Hudson, LL.D. 

 (Plate II.) 27 



X. Descriptions of new Genera and Species of Tenebrionidce from 

 Australia and Tasmania. By Francis P. Pascoe, F.L.S., F.Z.S., &c, 

 Honorary Member of the Natural History Society of Natal. (PI. X.) 29 



XI. Contributions to the Study of the Entomostraca. By George 

 Stewardson Brady, C.M.Z.S. &c. No. IV. Ostracoda from the 

 River Scheldt and the Grecian Archipelago. (Plates VII. & VIII.) 45 



XII. Replv to Dr. E. P. Wright's Observations on Dredging. By 



Dr. G. C. Wallich 50 



XIII. Descriptions and Sketches of some new Species of Araneidea, 

 with Characters of a new Genus. By the Rev. O. P. Cambridge, 

 M.A. (Plates IV, V., VI.) 52 



XIV. Note on a Fossil Lvcopodiacean Fruit. By M. Brongniart 74 



