470 " Letters, Extracts, Notices, fyc. 



(Monthly Microsc. Journ. 1872, p. 217) ; On the develop- 

 ment of the Skull of the Tit and Sparrow-Hawk (Monthly 

 Microsc. Journ. 1873, pp. 6, 45) ; On the development of the 

 Skull in the genus Tardus (Monthly Microsc. Journ. ]873, 

 p. 102) ; On the structure and development of the Wing in 

 the Common Fowl (Phil. Trans. 1888, p. 385) ; On the 

 presence of Claws in the wings of the Katitge (Ibis, 1888, 

 p. 124) ; Morphological elements of the Skull (Journ. Anat. 

 & Phys. viii. p. 62) ; On the Vertebral Chain of Birds (Proc. 

 R. Soc. xliii. p. 465) ; and on the Osteology of Steatornis 

 caripensis (Proc. Zool. Soc. ]889, p. 161). A paper on the 

 " Morphology of a Reptilian bird (Opisthocomus c?~istatus)" 

 was read before the Zoological Society on Feb. 4th, 1890, and 

 will shortly be published in the Society's ' Transactions/ 

 We may also remind our readers that Prof. Parker was the 

 joint author with Prof. Newton of the excellent article on 

 Birds, published in the ' Encyclopaedia Britannica/ ed. 9, 

 vol. iii. 



John Henry Gurney (Correction of an Error). — In the 

 obituary notice of the late Mr. Gurney in our last number, 

 it was stated (p. 394) that he attended the meeting at Cam- 

 bridge in the autumn of 1858. This is a mistake, for he was 

 prevented, almost at the last moment, from carrying out his 

 intention of being present. His advice, however, was acted 

 upon none the less, and was of great service to the other 

 founders of ' The Ibis.' 



