CONTENTS. V 



Page 



XXI. Descriptions of two new Species of IIumming-Birds. By 

 John Gould, F.R.S. &c 195 



XXII. Investigations upon the Structure and Natural History of 

 tie Vorticellce. By Dr. Richard Greef 196 



XXIII. On the Nomenclature of the Foraminifera. By W. K. 

 Parker, F.R.S., and Prof. T. Rupert Jones, F.G.S.— PartXV. The 

 Species figured by Ehrenberg 211 



XXIV. On some Recent Researches in Vegetable Physiology. 



By M. Marc Micheli 230 



XXV. On the Development of Syngamus trachealis. By Prof. 

 Ehlers 236 



New Books : — Figures of Characteristic British Fossils, with Descrip- 

 tive Remarks, by W. H. Daily, F.L.S., F.G.S., &c. Part III. 

 Plates 21-30. Upper Silurian and Devonian. — A Manual of 

 Zoology for the use of Students ; with a General Introduction 

 on the Principles of Zoology, by Henry Alleyne Nicholson, M.D. 

 &c. Second Edition, revised and considerably enlarged. . 240, 241 



Osteology of the Solitaire, by Prof. Owen, F.R.S. &c. ; Argas rejlexiis 

 s. Rhynclioprion columhce, by George Gulliver, F.R.S. ; Habits 

 of Tropic Birds, by the Earl of Pembroke ; Fish-nest in Sea- 

 weed of the Sargasso-Sea. Extracts from a letter from Prof. 

 Agassiz to Prof Peirce, Superintendent, United States Coast 

 Survey ; Morphology of Carpellary Scales in Larix, by Thomas 

 Meehan ; Supplementary Note on the Genns Lichenocrinus, by 

 F. B. Meek 241—247 



NUMBER LII. 



XXVI. Descriptive Notes on a nearly entire Specimen oi Pleiirodus 

 Rankinii, on two new Species oi Platysomiis and a new Amphicentntm, 

 with Remarks on a few other Fish-remains found in the Coal-measures 

 at Newsham. By Albany Hancock, F.L.S., and Thomas Atthey. 

 (Plates XVII. & XVIII.) 249 



XXVIL The Mollusca of St. Helena. By J. Gwyn Jeffreys, 

 F.R.S. . !^! 262 



XXVIII. The Origin of the Vertebrate Skeleton. By Harry G. 

 Seeley, St. John's College, Cambridge 26o 



XXIX. On the Nomenclature of the Foramiuifera. By W. K. 

 Parker, F.R.S., and Prof T. Rupert Jones, F.G.S.— Part XV. 

 The Species figured by Ehrenberg 280 



