Contents {continued). 



Page 

 February 25th. 



Exhibition of a Hybrid Duck and a Hybrid Pheasant, by Mr. 



Leadbeater g^ 



Exhibition of a female of the Grey Hen (Teirao tetrix), which 



had partially assumed male plumage, by Dr. Hamilton . . 84 



Exhibition of malformed Trout, by Dr. Cobbold 84 



Extracts from letter from Dr. G. Bennett of Sydney respecting 

 the ' Kagus ' intended to be sent by him to the Society, 

 and other matters 34 



On a New Species of Malacoptila from Western Ecuador. By 



Dr. P. L. ScLATER 56 



Descriptions of Butterflies from the Collections of A. R. Wal- 

 lace and W. C. Hewitson. By W. C. Hewitson 87 



On the Red Corpuscles of the Blood of Vertebrata, and the 

 Zoological Import of the Nucleus, with Plans of their 

 Structure, Form, and Size (on a uniform scale) in many 

 of the different Orders. By Professor Gulliver, F.R.S., 



F.Z.S., &C gj 



March II th. 



On the Brain of the Javan Loris (Stenops javanieus) . By W. 

 H. Flower, Conservator of the Royal College of Surgeons," 

 F.Z.S. (Abstract.) jq3 



On a new form of Physa, of the section Ameria, received from 

 George French Angas, Esq., Corr. Mem. Z.S. By Lovell 

 Reeve, F.L.S. . , , jq2 



March 25th. 



Announcement of the shipment of a living Kagu {Rhinochetus 

 jubatus) from Sydney, by Dr. G. Bennett, and several ex- 

 tracts from that gentleman's letter respecting the same . . 107 



Extract of a letter from Colonel Abbott to Mr. Wray respecting 



an incubating Python observed by him in India 107 



Extracts from letter addressed to Dr. Gray by Mr. H. Bland- 

 ford respecting Mollusks observed in Ceylon 108 



Characters of Nine New Species of Birds received in collections 



from Bogota. By Dr. P. L. Sclater 109 



On Two New Species of Tyrant- Birds from Ecuador. By Dr. 



P. L. Sclater 213 



Description of some New Species of Entozoa. JBy W. Baird 



M.D.. / ' JJ3 



Descriptions of Eight New Species of Cydostomacea, from the 



Collection of H. Cuming, Esq. By Dr. L. Pfeiffer 1 15 



Description of a New Species of Helix {Nanina). By Dr. L. 



Pfeiffer 11- 



Notes on the Form of the Comb (Pecten) in different 'inirem'^^ 

 and Apid(s, and on the Alar Hooks of the Species of Sphe- 

 codes and Halictus. By Miss Staveley 1 ] 8 



April 8th. 

 Announcement of the arrival of two living Paradise Birds {Pa- 



radisea papuana), purchased for the Society by Mr. A. R 



Wallace ^ ^ ' ^23 



Exhibition of two new species of Humming-Birds from Ecuador, 



and other birds, by John Gould ' 124 



Remarks on a Specimen of Alepisaurus ferox, recently obtained 



at Madeira. By James Yate Johnson, Corr. Mem. Z.S. 126 

 Remarks on the Fringilla incerta of Risso. By Alfred 



Newton, M.A., F.L.S., F.Z.S. . 128 



