. The water birds of North America . bout inches;extent, ; win-, ;-s.:so (aver-age, 7.!)!>) ; culmen, (LSI) ; gonys, () ; depth of billthrough angle,. ; tarsus, 1,() ; middle lor. ().sWith regard to the perplexing form with white eyelids and postocular streak, We must confess ourselves theory licit ii is an individual va-riation of troilt seems the oIiIn onewhich can be adopted, in view of Un-asserted [fact that the feature in ques-tion is not seasonal or sexual, and thaithe two forms are known to copul
. The water birds of North America . bout inches;extent, ; win-, ;-s.:so (aver-age, 7.!)!>) ; culmen, (LSI) ; gonys, () ; depth of billthrough angle,. ; tarsus, 1,() ; middle lor. ().sWith regard to the perplexing form with white eyelids and postocular streak, We must confess ourselves theory licit ii is an individual va-riation of troilt seems the oIiIn onewhich can be adopted, in view of Un-asserted [fact that the feature in ques-tion is not seasonal or sexual, and thaithe two forms are known to copulate will, ,,ch other (cf. Corns, Pr. Philad. Acad., 1868, 78). There may be some mistake, how-ever, as to these supposed facts ; at any rale, were they true, it seems very strange that, the samephase is never assumed by the western form of the species (califorilica). 1 By typographical error printed Plaff. in original. The correct .(notation is probably Oolymbuslangvigia, Olaffs. Reise, p. 562. 4 Extremes and average of nine (T. troile, summer dress. ALCIDiE —THE AUKS — URIA. 470 Uria troile. The Foolish Guillemot may In- taken as eminently typical of those diving-birdswhich are at once oceanic and Arctic. It occurs throughout the northern hemisphere,although rare in the North Pacific Ocean. On the American coast il breeds fromthe mouth of the Hay of Fundy — where it is comparatively rare— northward as faras the land extends. In midwinter it is found in the open sea as far south as the
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbirds, bookyear1884
