49G APPENDIX. 



ginated not from one but from many species ; Bucco grandis ; 

 Phasianus albo-cristatus in its various stages ; Parus (Leiothrix) 

 furcatus, Temminck ; Cinclus Pallasii, Teniminck. With re- 

 gard to the characters assigned to the genus Leiothrix by Swain- 

 son, of which the Parus furcatus is the type, and which has been 

 justly separated from the true Pariadse, some observations were 

 made, shewing that several of these are quite inapplicable to the 

 type of the genus. In exhibiting the Cinclus Pallasii, Mr Jame- 

 son remarked, that the genus was confined for many years to but 

 one species, the existence of the Pallas dipper being called in 

 question, and that not found out of Europe. Now, however, we 

 have three, and probably a fourth (a bird existing in the collection 

 of the University of Edinburgh, which may be placed in this ge- 

 nus, or rather forms a connecting link between the genus Cinclus 

 and that of Pitta), some of which are found in all the great con- 

 tinents of the world, with the exception of New Holland. That 

 the Cinclus Pallasii is the same as the Cinclus Americanus, an 

 opinion advocated by L. Bonaparte, can only be maintained by 

 those who have not had an opportunity of comparing the two 

 species, being very apt to be misled by the meagre description 

 of the former by Temminck ; one character alone distinguishes 

 the two species, viz. the Pallas dipper is more than a third larger 

 than the American ; moreover, the latter never assumes the co- 

 lour of the former, at least Mr Jameson was unable to detect, in 

 a series of specimens of the Cinclus Americanus, in the Museum 

 of the University of Edinburgh, the slightest approach to the 

 tinge of colour assumed by the Pallas Dipper. A specimen of 

 Wrj'neck (Yunx Torquilla) was exhibited, which was killed in 

 February last in Fifeshire. 



Dr E. K. Greville, formerly Vice-President, in the chair. — A 

 A r 1 16 "'^^''C^ ^^'^s ^"^^d ^^ ^^^^ dolomization of the marble limestones 

 of Skye, with analysis of the same shewing their magnesian cha- 

 racter. The author stated his viewB in regard to the geognos- 



