690 OBSERVATIONS ON THE ORDER PASSERES. 



Page 



Kingfishers, mentioned at p. 410, as having " the lower man- 

 dible swelled out." We may here observe that the genus 

 Tonysiptera, proposed on the assumption that the structure of its 

 feet, when known, will be found sufficiently distinct from those 

 of Halcyon, rests, to say the least, upon a very slender founda- 

 tion. Neither can we adopt the artificial genus Ceyx, composed 

 as it confessedly is of true Kingfishers and Martin Chasseurs. 



The primary distinction in the external structure of Halcyon 

 and Dacelo rests in the form of the upper mandible of the bill. 

 In the first the culmen is perfectly straight, without any emar- 

 gination near the end ; in the latter, the culmen is bent towards 

 its extremity ; and this bend corresponds to a long sinuosity at 

 the edge of the margin, which appears, at first sight, as if a 

 lanceolate slip of the bill had been broken off. 



END OF VOL. Vin. 



LONDON: 



SIIACKELL AND BAYLIS, JOHNSOys- COURT, FLEET-STREET. 



