M C0NTEN1 



XLHI. Remarks on the Generic Distribution of the British Hydro- 

 xy A. II. Hal i day, E << page 4ol 



\ 1.1 V. Further Remarks on tin- Morph< logy of the Ascidia of Plants. 

 [•V Prof, Ch. Mouki.n, Member of the Koyai Academy of Brussels ... 41J 



XLV. Descriptions of British Chalcidites. By Francis Walher, 

 Esq., F.L.S 415 



XLVI. On two South in Genera of the Natural Order Po»«- 

 florete. By the Hon. W.H. Harvbt, of the Cape of Good Hope. (With 

 Two Plates.) 420 



XLVI I. List of Fossil Mammifera from the Basin of the Kio das 

 Velhas, Brazil, with some of their distinguishing Characters. By Dr. 

 Lund 422 



XLVIII. Enumeration of Plants collected by Mr. Schomburgk in 

 British Guiana. By George Bentham, Esq., F.L.S 127 



NUMBER XX. SUPPLEMENT. 



XLVIII. Enumeration of the Plants collected by Mr. Schomburgk 

 in British Guiana. By George Bentham, Esq., F.L.S. [Continued.'] 435 



XLIX. On the Metamorphoses of the Crustacea. By Capt. C. 

 DuCane, R.N. (With a Plate.) 438 



L. Remarks on the Fumariacea. By George Dickie, Esq., A.L.S. 440 



New Hooks : — A General Outline of the Animal Kingdom, by Prof. 



Rymer Jones 443 



Proceedings of the Zoological Society; Linnrean Society 445 — 4G1 



On the structure of the Volvocince ; Development of the Leguminosce; 

 Structure of the scales of Fish and Reptiles ; Lemna arrhiza ; Dis- 

 covery of Mummies in Mexico ; Olfactory Sense of the Antenna? ; 

 Geographical Distribution of Palms ; Meteorological Observations 

 and Table 461— -1GG 



PLATES. 



Plates I. II. Goniatites. 



II. British Cydippe. 



III. Vespertiiio aediiis. 



IV. Cassidse. 



V. New species of Cimex. 

 VI. British Nereides. 

 VII. Fungi and Algse. 

 VIII. Polyporus australis. 

 IX. Acharia tragoide-.. 



X. Ceratosicyos Echlonii. 

 XL Metamorphosis of Crustacea. 



ERRATA. 



Page 139, line 31, omit the words fin conjunction with Prof. Muller). 



— 142, line 32, omit Charles. 



— 166, line 10, for Coltemci and Bceomyces as specimens: however, if read CoUema 



Bccomyccs ; as specimens, however, of; 



— 106, line 3 from bottom,/or theca? read thecal 



— 227, line 5 from bottom, for Lison read Linn. 



— 350, line 18, after Australia add and the Islands of the Indian Archipelago 



