100 



Mr. P. C. Mitchell on the 



Oncnpied by a dingonal row. The seven spe:?ies of Kingfishers 

 mentimed in the first column of the list given above are 

 diastataxic; in five of them the gap is almost as wide as 

 the space for a complete row with a quill ; in two, the gap 



Fi-. 6. 



Ceri/ie maxima, diagram of culjital feathering. Explanation as in figure 4. 

 Tbe diastataxic gap ( X ) is small, but is occupied bj a diagonal row, 

 complete save for a quill. 



is narrower, but in all it is occupied by a fairly complete row 

 of feathers. 



Halcyon pileata (fig. 7) must certainly be described as 

 eutaxic. The carpal covert and carpal rcmex are normal, 

 the latter bound down by the usual plica. Then follow the 



FifT. 7. 



Halcyon pileata, di igram of cubital feathering. Explanation as in figure 4. 

 Euta.xic arrangement, but po.^tion of diastataxic gap(x) marked 

 by vestige of a diagonal row, consisting of three leathers. 



secondary quills in even series, each at the base of a diagonal 

 row. But in the position of the diastataxic gap, although 

 there is no gap, and no trace of tbe so-called major covert 

 that occupies the base of the row in diastataxic birds, there 



