31S 



URIA TROILE. FOOLISH GUILLEMOT. 



COMMON GUILLEMOT. "WILLOCK. LUM. LLXGY. LAMIII, or LAW. MURRE. 



MURSE. MAEROT. TINKERSIIEER. SCOUT. SKIDDAW. 



SEA-HEN. SCUTTOCK. 



Fig. 



Colymbus Troilo. Liim. Syst. Nat. I. 220. 



Uria Troile. Lath. Ind. Ornith. II. 795. 



Guillemot a capuchon. Uria Troile. Temm. j\Ian. d'Ornith. II. 921. 



Foolish Guillemot. ]\Iont. Ornith. Diet, and Supplt. 



Lesser Guillemot. Mont. Ornith. Diet. 



Foolish Guillemot. Uria Troile. Selby, Ulustr. Brit. Ornith. 120. 



Uria Troile. Jcnyns, Brit. Vci't. Anim. 2.J8. 



Uria Troile. Bonap. Comp. List, 65. 



Bill ratlicr stout, sUghthj decurred toirard the end, black, 

 the angle of the lower mandible slightly iirominent, and its 

 sides convex ; 'plumage greyish-black above ; sides of the head 

 and fore part of npper neck tinged tcitli broicn ; lower parts 

 and tips of secondaries white ; sides streaked icith black; tail 

 of ttvelve feathers; interdigital membranes emarginate. In 

 summer, the u-hole head and throat brown. In winter, the 

 sides of the head Ix'hind the eyes and the throat white. 



