exposed ledge of a cliff, in a similar place to that so often selected by the guillemot.... The nests are very slight, and in a great number of instances are dispensed with altogether.’ Of the number of fulmars, the same observer says: ‘The myriads of birds were past all belief: the air was darkened with their numbers; still the cliffs were white with birds, and I calculated that not more than one in ten had risen. The fulmars filled the air like large snowflakes, and the hordes of puffins looked like a huge swarm of bees, darkening the air as far as we could see. Myriads of birds swept round the vessel or filled the air above; the face of the cliffs seemed crumbling away as the living masses swept seaward; yet, singularly enough, little noise was made beyond the humming of countless wings. The mighty peaks of these solitary ocean rocks were indistinctly seen through the surging cloud of birds, that seemed almost as if it would descend and overwhelm us.’[2] * * * * * Two petrels remain to be noticed: the capped petrel (_Œstrelata hæsitata_) and Bulwer’s petrel (_Bulweria columbina_), one straggler having been obtained of the first species, and two of the second, on the east coast of England. Great Northern Diver. Colymbus glacialis. [Illustration: FIG. 115.--GREAT NORTHERN DIVER. ⅑ natural size.] Bill black; irides red; head and neck black, glossed with purple on the upper throat, and with green on the lower neck; two throat-bands black barred with white; mantle black spotted with white; under parts white. Length, thirty-three inches. * * * * *