VI CONTENTS. 



XLIII. Remarks on the Generic Distribution of the British Ilydro- 

 myzidcB. By A. H. Haliday, Esq page 401 



X LI V. Further Remarks on the Morphology of the Ascidia of Plants. 

 By Prof. Ch. Morren, Member of the Royal Academy of Brussels ... 411 



XLV. Descriptions of British Chalcidites. By Francis Walker, 

 Esq., F.L.S 415 



XL VI. On two South African Genera of the Natural Order Passi- 

 jlorece. By the Hon. W. H. Harvey, of the Cape of Good Hope. (With 

 Two Plates.) 420 



XL VII. List of Fossil Mammifera from the Basin of the Rio 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 427 



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 Fumariacecs. By George Dickie, Esq., A.L.S. 440 



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



Rymer Jones 443 



Proceedings of the Zoological Society ; Linnsean Society 445 — 461 



On the structure of the Folvocincs ; Development of the Leguminosa ; 

 Structure of the scales of Fish and Reptiles ; Lemna arrhiza t 'Dis- 

 covery of Mummies in Mexico ; Olfactory Sense of the Antenna^:; 

 Geographical Distribution of Palms ; Meteorological Observaitions 

 and Table 461—466 



PLATES. 



Plates I. II. Goniatites. 



II. British Cydippe. 



III. Vespertilio asdilis. 



IV. Cassidse. 



V. New species of Cimex. 

 VI. British Nereides. 

 VII. Fungi and Alga?. 

 VIII. Polyporus australis. 

 IX. Acharia tragoides. 



X. Ceratosicyos Echlonii. 

 XI. Metamorphosis of Crustacea. 



ERRATA. 



Page 139, line 31, omit the words (in conjunction with Prof. MuIIer). 



— 142, line 32, omit Charles. 



— 166, line 10, for Collema and Bceomyces as specimens; however, if read Collcma 



Bceomyces j as specimens, however, of J 



— 166, line 3 from bottom, /or theca; read theca*! 



— 227, line 5 from bottom, /or Lison read Linn. 



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



