1038 



MR, W. P. PrCRAFT 0]N" THE 



[Dec. 19, 



process in the Diver (fig. 1) may exceed the femur in length. 

 In, the Grebes (fig. 2) it is not more than half as long. The ecto- 



i'ig. 1. 



Pig. 2. 



Outer aspect of the pelvic limb of Colymbus septcntrlonalis (fig. 1) and 

 Podicipes cristatus (fig. 2), adult. 



cc, cnemial crest; p., patella; /, femur; fib., fibula; t., tarsus. 



and entocnemial crests bear about equal shares in the formation 

 of this cnemial process. 



