236 THE BIRDS OF HELIGOLAND 



fresh examples, are as follows: Total length, 1T22 in. (285 mm.); 

 length of wings, 6'46 in. (164 mm.) ; length of tail, 410 in. (104 

 mm) ; length of tail uncovered by wings, 2'17 in. (55 mm.) ; length 

 of beak, '86 in. (22 mm.) ; length of tarsus, T38 in. (35 mm.). 



On the wings the third and fourth primaries are the longest, 

 the latter receding only from -04 to '08 in. (1 to 2 mm.) ; the second 

 flight-feather is from '16 to '20 in. (4 to 5 mm.), shorter than the 

 fourth, but by about double as much longer than the fifth, 

 its tip thus approaching considerably closer to the fourth than 

 to the fifth. 



The tail is more or less rounded. In one of my examples the 

 outermost pair of feathers is T47 in. (12mm.). the next pair -20 in. 

 (5 mm.) shorter than the rest, while in another nearly all the feathers 

 are of equal length, only the outermost pair being '35 in. (9 mm-.) 

 shorter. 



According to actual observations, the nesting range of this 

 species must extend from the Asiatic side of the Jenesei through 

 southern Siberia. No eggs or nests however have as yet been dis- 

 covered of which one could assert with certainty that they belonged 

 to this species. 



64. Small-billed Mountain Thrush [HIMALAYA-DROSSEL]. 

 TUKDUS DAUMA, Latham. 



Geocichla dauma. Seebohm, Cat. Brit. Mus. Birds, v. 154. 



In the museum of Lund there is a Thrush, which, by the wiU of 

 Baron von Gyllenkrog, went with the rest of his collection after 

 his death to this institution. This example, alleged to have been 

 caught on Ftihnen, was bought about fifty years ago by Herr von 

 Gyllenkrog from Brandt, a Hamburg naturalist. Brandt, however, 

 informed me personally, a few years ago, that this example was one 

 of the two birds which at that time, about 1836, reached him from 

 Heligoland, and which Gould, likewise supporting himself on 

 Brandt's statements, mentions in his Birds of Europe as having 

 occurred in the neighbourhood of Hamburg. The latter Thrush, 

 according to Gould's determination, was undoubtedly T. varius, 

 and still exists, as has been already mentioned, in a collection in 

 England. The other Thrush, however, which in the Lund museum 

 is exhibited as T. lunulatus, does not belong, according to the form 

 of the wings, to the latter species, but to T. dauma from the 

 Himalayas, between which and the Australian T. lunulatus, 

 according to Dresser, no hard and fast dividing line can be 

 drawn. 



According to the wing measurements supplied to me from 



