COI.YMBID.IC. ]39 



Order C O L Y M B I F O R M E S. 

 Family COLYMBID.E. 



The eggs of the Divers are coarse in texture, but have a fair 

 amount of gloss. They are typically of a narrow oval shape, hut 

 long cylindrical or biconical specimens, with both ends quite alike, 

 are not uncommon. 



The eggs of all Coh/mlndce resemble each other very closely, and 

 size is the only character of any assistance in discriminating them. 



The ground-colour varies considerably, ranging through daik 

 olive-brown, umber-brown and russet-brown, to dark stone-colour 

 or dull greenish grey. 



The eggs are double-spotted. The underlying or shell-markings 

 are inconspicuous small spots of a purplish grey or pale brown. The 

 surface-markings, consisting of spots and blotches, are inky purple, 

 purplish brown, or even black. These are not usually of any great 

 size, nor are thoj- very thickly spread over the shell. They are, in 

 most cases, distinct and well-defined, and they are often more 

 numerous round the larger end than elsewhere. On a few examples 

 the markings at the larger end have a streaky appearance. 



Genus COLYMBUS, Linn. 

 Colymbus septentrionalis, Linn. 



Colymbiis septentrionalis, Thien. Furfpflanz. ges. Voq. tab. vie. fig. \,a a 

 ' (184i'3-54) ; Baedeker, Eier Eur. Viifj. tab. nS. fig. .'J (185o-63); 



Hewitson, -EV/.c/s of Brit. Birds, ii. p. 453, pi. exxiii. fig. i (1856); 



Dresser, Birds Eur. viii. p. (j:il (1876) ; Seebo/un fSi- liar vie- Brown, 



Ibis, 1876, p. 455; Seehohn, Ibis, 1879, p. 161 ; id. Brit. Birds, iii. 



p. 412, pi. 35 (1885) ; id. Egqs of Brit. Birds, p. 78, pi. 21. fig. 2 



(1896); Grant, Cat. Birds B. M. xxvi. p. 487 (1898); Skarpe, 



Hand-l. i. p. 115 a899). 

 Urinator lumnie, Baird, Brewer ^- Rid(/w. Water Birds N. Am. ii. p. 457 



(1884) ; MacFarlane, Proc. U.S. Nat. Mus. xiv. p. 416 (1891). 



The eggs of the Iled-throated Diver measure from 2-6 to 3-1 in 

 length, and from 1*7 to 1"9 in breadth. 



1. Franklin Bay, Arctic America (i?. J?. Salvin-Goduian Coll. 



MaeFarlane : Uenshaic Col/.). 



2. Cambridge Bav, Arctic Americ.i. Capt. Collinson [P.]. 



2. Kitenbenk, Greenland. Col. II. W. Feilden [P.]. 



2. Repulse Bay, Hudson's Bay. Dr. J. Rae [P.J. 



2. Repulse Bay, 6th July. " Dr. .T. Rae [P.J. 



2. (ireenland. Governor Ilolboll. 



1. Disco Bay, Greenland. McCorniick Bequest. 



2. Greenland [E. Feneker). Seebohm Coll. 



