CONTENTS. V 



XVII. On the Structure of the Ovule in Plants. By M.J. Scitleiden, 

 M.D., Professor of Botany in the University of Jena page 162 



XVIII. On the Bone of an unknown Struthious Bird of large size 

 from New Zealand. By Richard Owen, Esq., F.R.S 1G6 



XIX. Miscellanea Zoologica. By George Johnston, M.D., Fel- 

 low of the Royal College of Surgeons of Edinburgh 1G8 



XX. On the British Actiniadce. By Edward Forbes, Esq. (With 

 aPlate.) 180 



XXI. A short Outline of a Fauna for Part of Herefordshire. By 



R. M. Lingwood, Esq., F.L.S 184 



XXII. Monograph of the Dorylidce, a Family of the Hymenoptera 

 Hetcrogyna* By W. E. Shuckard, Esq 188 



XXIII. Description of the Snake-nut Tree of Guiana. By Robert 



H. Schomburgk, CM., R.G.S. (With a Plate.) 202 



XXIV. Information- respecting Botanical Travellers: — 



Mr. Griffith's Journal of the Mission to Bootan 205 



Neiv Books : — A Report on the Progress of Vegetable Physiology du- 

 ring the year 1837, by F. J. F. Meyen, M.D., Professor of Botany 

 in the University of Berlin. Translated from the German, by 

 William Francis, A.L.S. — A list of the Genera of Birds, with an 

 indication of the Typical Species of each Genus, by George Robert 

 Gray 211—214 



Proceedings of the Zoological Society 215 



Botanical Information: — " Unio Itineraria;" Note on Argulus folia- 

 ceus, Jurine, by Wm. Thompson, Esq. ; Infusorial Animalcules in 

 Red Snow; Meteorological Observations and Table 219 — 224 



NUMBER XXXI. 



XXV. On the recent Doctrines of Vegetable Embryology. By 

 Herbert Giraud, Member of the Council of the Botanical Society 



of Edinburgh. (With a Plate.) 225 



XXVI. Observations on the Family Helicidce, and description of a 

 new Genus. By Dr. L. Pfeiffer of Cassel 238 



XXVII. Some Remarks on the foregoing Paper of Dr. L. Pfeiffer, 

 especially on the Clausium of Clausilia. By John Edward Gray, 

 F.R.S., Keeper of the Zoological Collection in the British Museum ... 243 



XXVIII. Additions to the Fauna of Ireland. By Wm. Thompson, 

 Esq., Vice-Pres. Nat. Hist. Society of Belfast 245 



XXIX. On the " Freshwater Carriers," or TkelidomasofMr. Swain- 

 son > 257 



XXX. Monograph of the Dorylidce, a Family of the Hymenoptera 

 Heterogyna. By W. E. Shuckard, Esq 258 



