APPENDIX. 383 



resolved not to recognise these names as being by an 

 anonymous author. Pallas' name Anas rutila is still 

 kter, dating from 1770. 



Genus ANAS. Type by subsequent designation o£ Lesson 

 (Man. d' Orn. ii. 1828, p. 417) : A. hosclias Linn. 



Anas boschas. It was first shown by Lomiberg (Journ. £. 

 Ornith. 1906, p. 528) that Linnjeus described the female 

 Mallard under the name A. platyrhynchos on p. 125, 

 and the male as A. hosclias on p. 127 of his 10th edition. 

 Although in his 12th edition Linnaeus states that the 

 A. platyrhynchos of the 10th edition is a synonym of 

 A. dypeata, it must have been due to an error or lapse, as 

 the description of the purple speculum bordered above 

 and below with black and white can only refer to the 

 Mallard and cannot possibly apply to the Shoveler. The 

 correct name under the code is undoubtedly the first, but 

 this is a case where the (Jommittee consider the generally 

 known name should be conserved, as it has been in- 

 variably used since 1758 until quite recently. 



Anas strepera. The Gadwall is hardly worthy of generic 

 separation from the Mallard and is therefore retained in 

 the genus Anas. 



Genus GUEEQUEDULA. Type by tautonymy : Q. querque- 

 dula (Linn.). In the A. 0. U. Check-List the reference 

 to this genus is Oken, Isis, 1817, p. 1183, but Oken did 

 not describe the genus in accordance with the rules laid 

 down by the International Commission. The name is 

 a " nomen nudum " without indication of any species 

 belonging to it and cannot be accepted as of Oken. 



Genus MABECA. Type by subsequent designation of Eyton 

 (Monogr. Anat. 1838, p. 33) : Mareca fistularis = 

 M. penelope (Linn.). 



Genus SPATULA. Type by raonotypy : S. dypeata (Linn.). 



