Farlow.] 304 I June 14, 



in the nest and eggs from those of Mnpidonax Traillii, and 

 all other species of the genus, indicate that E. pusillus is a 

 good species and not merely a variety of the former. 



Dr. B. Joy Jeffries, by the aid of diagrams, illustrated the 

 unity of design in the eyes of animals which he had referred 

 to at the preceding meeting ; he also explained the causes of 

 color-blindness. 



Dr. Farlow exhibited the Algae collected by Mr. Chas. 

 Wright, in the late San Domingo expedition, thirty-five spe- 

 cies, of which twenty-five had been collected by Mr. Wright 

 in Cuba also. Dr. Farlow remarked that it was singular that 

 among the many specimens of Sargassum no specimen of S. 

 bacciferum, the true gulf-weed, was to be found. He also re- 

 ferred to the ill-defined characters of this large genus. Tur- 

 binaria vulgaris, found also in Jamaica, forms an interesting 

 connecting link between Sargassum and Fucus. 



The thanks of the Society were voted to the Trustees of 

 the Mt. Auburn Cemetery for the gift of a Trumpeter Swan. 



Section of Microscopy. June 14, 1871. 

 Mr. Bicknell in the chair. Nine members present. 



Mr. Bicknell showed some paper cells made by him in a 

 very simple manner. A number of layers of card-board of 

 the desired thickness are clamped together, and holes are 

 bored with a spur-bit through the whole thickness, at a con- 

 venient distance apart. The card is then pressed smooth 

 and finally cut up. 



Mr. Stodder exhibited a slide containing Stauroneis Stod- 

 derii Greenleaf, from Lyman's Pond, Waltham, collected by 



