420 C.J. Sun tic vail on the IVinys of Birds. 



rudimentary, it is the second. Picus alone agrees with the 

 Song-birds. Ct/pselus and Trochilus have the first series per- 

 fectly developed, but seem to want the second entirely. In 

 Psittacus ochrocephalus, Wagl., which likewise has the first 

 series large, the second also occurs, but quite rudimentary 

 and concealed by the following feathers. The same condition 

 appears to me to occur in Coracias and Cuculus. Columba, 

 on the other hand, has the first series small, concealed by 

 the second, but, upon the hand, first interrupted, then again 

 continued and larger ; the feathers of the second series are 

 very large upon the cubitus, but soon cease upon the hand, 

 upon which they seem to form a single row with the first. 



In the Accipitres diurni and the Gallinfe (fig. 4, o, nos. 1, 2) 

 the first series is pretty large and the second quite small, 

 and concealed by the following feathers, or quite rudimentary. 

 In Falco suhbuteo they seemed to me to be entirely wanting ; 

 and the first series was concealed by the third. The Owls, 

 on the contrary, have both series large; but in Strix nisoria 

 the first is concealed by the second and downy at the edges ; 

 in Strix aluco the first series is the largest. 



Among the Grallse, these series in the Rallidce seem to re- 

 semble those of the Gallinse and Raptores. In the Tringarise 

 {Scolopax, Numenius) the first is the largest and continued 

 upon the hand ; the second soon ceases upon the hand, and 

 becomes so high posteriorly upon the cubitus as to conceal 

 the last feathers of the first series. Grus and Cicotiia have 

 the first series unusually large, especially inwards ; and the 

 second of moderate size. 



In the Water-birds {Anas, the Pygopodes, and Sterna) 

 those of the first series are very large ; they reach to about | 

 of the remiges, and are continued to the end of the wing ; the 

 second are smaller, and cease a little before the tip of the 

 finger. In Carbo the second series is small and concealed. 

 In Larus both are very large and nearly similar, so that the 

 first series is evenly concealed by the second, except poste- 

 riorly, where it projects far out. In Uria grylle the first 

 series is large, the second small and concealed, but quite 

 right-lying, with the obverse side turned away from the surface 



