CONTENTS. V 



Page 

 XX. On the Investigation of Vegetable Tissue by the aid of 

 Polarized Light. By U. von Mohl 198 



Proceedings of the Botanical Society of Edinburgh ; Zoological Society; 



Geological Society 209—233 



Remarks on the Zoe of Eurynome aspera, and the Habits of the Ani- 

 mal in Confinement, by Prof. Kiiiahan ; On a new sjjecies of 

 Barbct from the Upper Amazon, by P. L. Sclater, M.A., F.L.S. ; 

 On the Petrified Forest of Radowenz near Adersbach, and upon 

 the Process of Petrifaction, by Prof. Goppert ; On the Structure 

 and Development of the Flower and Fruit of the Pear, by J. 

 Deoaisne ; Description of a new genus and some new species of 

 American Birds, by P. L. Sclater, M.A , F.L.S. ; On a quan- 

 tity of Crabs thrown up on the Beach in Payta Bay, by Dr. C. 

 Forbes, R.N 233—240 



NUMBER IV. 



XXL Notes on the Palaeozoic Bivalved Entomostraca. No. IV. 

 Some North American Species. By T. Rupert Jones, F.G.S. 

 (With two Plates.) 241 



XXII. Description of a new Ceylonese Nudibranch. By Dr. E. 



F. Kelaart. (With a Plate.) 257 



XXIII. Note on the Red Colouring Matter of the Sea round the 

 Shores of the Island of Bombay. By II. J. Carter, Esq., II.C.S. 

 Bombay 258 



XXIV. On the Investigation of Vegetable Tissue by the aid of 

 Polarized Light. By H. vox Mohl 263 



XXV. On the Nature and Origin of the External Coatings of Seeds. 



By John Miers, F.R.S., F.L.S. &e 276 



XXVI. Some Observations on Professor Agassiz's Criticisms on 

 the " Catalogue of Shield Reptiles in the Collection of the British 

 Museum." By Dr. J. E. Gray, F.R.S., V.P.Z.S., P. Ent. Soe. &c. . 285 



New Book. — Contributions to the Natural History of the United 



States of America, by Louis Agassiz 289 



Proceedings of the Zoological Society ; Royal Society 2.95 — 313 



Remarks on the Habits of the Common Mussel, by D. Robertson, Esq.; 

 Notice of the Natural History of St. Kitts, bv the late J. R. 

 Elsey, jun., Esq. ; On the Nidification of Crustacea, by C. Spence 

 Bate, F.L.S. &e. ; Note on the Occurrence of Dasya venusta, by 

 Dr. J. E. Gray, F.R.S., V.P.Z.S. &c.; Prof. Owen's Lectures on 

 PaliKontology 314—320 



