382 Mr. R. F. Tomes on White's Thrush. 



II III 

 Length from point of bill to end of tail . . 12^ 2 



„ of tail 4 5 



„ of bill, along the ridge 10 



„ of bill, gape line 13 



„ of wing from carpal joint, following 



its anterior curve 7 3 



„ of tarsus 15 



,, of middle toe and claw 14 



„ of hind toe and claw 12 



Expanse of wings 20 6 



The digestive organs differ somewhat from those of such of 

 our British Thrushes as I have been able to make comparison 

 with, in being strictly adapted to an insectivorous diet. The 

 tongue, tapering to a smooth cleft point, is somewhat horny, 

 and rather distinctly serrated on its upper surface near the root. 

 CEsophagus of moderate length, without crop or dilatation, but 

 rather wide; proventriculus moderately well developed, much 

 more so than in the Blackbird, relatively much as in the Song- 

 thrush. Stomach membranous, indicative of a more insectivorous 

 regimen than the Blackbird ; of small size, scarcely exceeding in 

 this particular that of the much smaller Song-thrush; irregularly 

 oblong, its greatest diameter being at right angles to a line 

 between the two orifices. Intestine rather short in relation to 

 the size of the bird, only exceeding that of the Blackbird by 

 three or four inches, whilst in the bulk of the two birds there is 

 manifestly a much greater difference than this. It is of medium 

 size, and decreases evenly to the crcca. The latter are much 

 more distinct than in the Blackbird, but somewhat like those of 

 the Song-thrush. Cloaca large. 



The following are the dimensions of these parts : — 



II III 

 Length of the oesophagus 4 3 



Breadth of do 4 



Length of the proventriculus 8 



„ between the two orifices of the stomach 4 

 „ of the stomach measured at right 



angles to the last dimension . . 10 



of the intestine 21 



