317 



bird-like. Why bones have not been more often discovered he 

 cannot explain ; the few specimens found are not those of birds, 

 though hollow, but reptilian (allied, as the President remarked, 

 to those of the pterodactyl). 



Dr. Bryant, on again examining the humming-bird 

 called by him Trochilus Bahamensis, found that it pos- 

 sesses ten rectrices like the other members of the family. 



The two central tail feathers are nearly covered by the upper 

 tail coverts, and are of the same bronze green color ; they are 

 much shorter than the rest, though not sufficiently so to be con- 

 sidered abnormal. 



The President made some remarks on the anterior 

 and posterior symmetry of the limbs in man and animals, 

 showing that the arms and legs are to a certain extent 

 repetitions of each other. 



Prof. Robert E. Rogers, of Philadelphia, was chosen a 

 Corresponding Member. 



Drs. Francis P. Sprague and G. H. Nichols ; Messrs. 

 Nathaniel Bowditch and George H. Snelling, of Bos- 

 ton ; Rev. Joseph H. Allen, of Jamaica Plain ; and Mr. 

 Thomas S. Moore, of Cambridge ; were chosen Resident 

 Members. 



June 20, 1860. 



The President in- the Chair. 



Prof. William B. Rogers made a Report upon the 

 Registering Thermometer of Dr. James Lewis, of Mo- 

 hawk, N. Y., the consideration of which had been re- 

 ferred to him at a former meeting. 



