1038 



MR. W. V. PYCRAFT OX THE 



[Dec. 19, 



process in the Diver (fig. 1) may exceed the femur in leno;th. 

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



Kg. 1. 



Fig. 2. 



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

 Podicipes ci-istaius (fig. 2), adult. 



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



and entocnemial crest.s bear about equal shares in the formation 

 of this cnemial process. 



