VoL XIX-j pj^^^.^ Bones of the Great Auk in Florida. 255 



Calidris arefiaria. Natal, juvenal, compound first non-iuiptial, 

 simple first nuptial, simple second non-nuptial, compound adult 

 nuptial. 



Cepphus grylle. Natal, juvenal, compound first non-nuptial, 

 compound nuptial, simple adult non-nuptial. 



Somateria spectahilis. Natal, juvenal, compound annual, pro- 

 tective (or tutelar.) 



Lagopuslagopus. Natal, juvenal, first protective, compound non- 

 nuptial, compound nuptial, adult protective. 



Finally I have prepared a table (p. 254) showing by the graphic 

 method, the plumage-cycles of several species, which differ in the 

 number of plumages worn in equal lengths of time. I have rep- 

 resented the average length of time each plumage is worn and the 

 average time of the beginning of the moults but individuals 

 delayed in moult or deficient in vitality will vary much from the 

 average. To-day the average is none too well known even among 

 the commonest species. 



ON THE FINDING OF THE BONES OF THE GREAT 

 AUK {PLAUTUS IMPENNIS) IN FLORIDA. 



BY O. P. HAY. 



About the beginning of the present year the writer received, 

 for identification, from Prof. W. S. Blatchley, State Geologist of 

 Indiana, a small collection of bones which he had made from an 

 Indian shell heap at Ormond, Florida. In looking over this lot of 

 bones, which in general are those of species living to-day in that 

 region, attention was attracted by a strongly flattened bird humerus. 

 It soon became evident that it belonged to some member of the 

 Alcidse, but was larger than the humerus of any species now living 

 along our coast. On the suggestion of Mr. F. M. Chapman, it 

 was compared with humeri of the Great Auk which had been col- 

 lected by Prof. F. A. Lucas on Funk Island, and the comparison 

 showed that it agreed with those in every particular. This result 



