568 



fuscis, remigibus secundariis albo apicatis : pectore et corpore subtus albis, hypoehondriis fusco striatis : 

 pedibus et rostro nigricantibus : iride fusca. 



Ad. ptil. Mem. mento, gula et capitis lateribus albis nee fuscis, his lateraliter fusco guttatis : stria fusca per 

 capitis latera, pone oculos : corpore et capite supra saturatioribus. 



Juv. ptil. Mem. adulto similis, sed rostro graciliore et pallidiore, pedibus flavido tinctis. 



Pull, capite et corpore supra sordide fuscis, pileo et nucha, albo striatis : subtus albus, mento et gula, sordide 

 griseo notatis. 



Adult in summer (Flamborough) . Head and neck all round dark brown ; upper parts of the body dark 

 brown with a slaty tinge ; wings and tail dark brown, the secondaries tipped with white ; underparts 

 from the throat white, the flanks streaked with dusky brown; nnder wing-coverts white, slightly 

 variegated with dusky grey ; bill black ; the legs blackish olivaceous, the webs rather more olivaceous ; 

 iris brown. Total length about 16 - 5 to 17 inches, gape 2'9, wing 7 m 7, tail 2 - 05, tarsus 1*5. 



Adult in winter (Leadenhall market, 9th November). Differs from the adult in summer dress in having the 

 throat and sides of the head white on the edges, where it joins the dark-brown coloration, and on the 

 lower throat mottled with brown ; a dark streak passes from behind the eye through the white on the 

 side of the head ; the brown on the upper parts darker than in the summer dress. 



Young in winter (Leadenhall Market, November) . Resembles the adult, but has the bill more slender and 

 lighter in colour; feet tinged anteriorly with yellowish. 



Young in down (Lundy Island, July 1872). Covered with short, close down; upper parts dusky brown, the 

 head and hind neck streaked with white ; underparts white, the chin and throat marked with dusky 

 grey. 



Obs. The ringed variety only differs from the adult in summer plumage in having a narrow ring round the 

 eye and a streak passing along the side of the head from the eye white. 



The Common or Foolish Guillemot inhabits the northern portions of Europe and the Atlantic 

 coasts of North America, ranging further south in winter. It does not, however, go as far north 

 as Briinnich's Guillemot, which replaces it in higher latitudes. 



In Great Britain it is common and resident all round the coast; but, except during the 

 breeding-season, it usually keeps out at sea, and is less frequently observed. It breeds in suitable 

 localities, usually in high cliffs overhanging the sea, all round the coast from the Isle of Wight 

 up to the extreme north of Scotland. Mr. Robert Gray says (B. of W. of Scotl. p. 420) that it is 

 " the most abundant of the Alcidse to be found on the west of Scotland. Immense numbers of 

 Guillemots frequent the coasts of the mainland as well as the inner and outer group of islands ; 

 and wherever suitable cliffs occur they take up their quarters during summer, forming colonies 

 numbering, in some particular places, two or three hundred thousand birds. In the vicinity of 

 these breeding-haunts they literally blacken the surface of the sea, creating a sight interesting 

 alike to the bird-student and ordinary tourist." 



It is not uncommon off the coast of Ireland ; and some remain throughout the year. There 

 are breeding-colonies, in suitable localities, in the cliffs overhanging the sea in many parts of the 



