1880.] NATURAL SCIENCES OF PHILADELPHIA. 413 



Potts : Fragments of Indian skeletons, pottery, etc., bank of the 

 Delaware River, below Kaighn's Point, Camden, N. J. Jos. Wil- 

 cox : Fragments of pottery, from a mound, St. John's River, Fla. ; 



Stone axe, pestle and arrow-head, Mitchell Co., N. C. ? Two 



pieces Ancient Peruvian potter}^ 



C. F. Parker. 



Respectfully- submitted by 



Joseph Leidy, 



Chairman Curators. 



REPORT OF THE BIOLOGICAL AND MICROSCOPICAL 



SECTION. 



During the past j-ear eighteen (18) meetings were held ; the 

 average attendance being thirtj^ (30) persons. 



The Annual exhibition was held on the evening of October 15th, 

 at which time a large and interested compam- was present. 



The following is a summary of the principal subjects presented 

 during the 3'ear : — 



Dec. 1st, 18T9.— Filarite in the Bronchial Tubes of Cattle, by 

 Dr. James McCoart. 



Dec. 15th, 1819. — Modern Microscopical Work, by Dr. J. Gib- 

 bons Hunt. 



Dec. 15th, 18t9. — Description of Psorosperms found in Cysts 

 of Fishes, by John Ryder. 



Jan. 5th, 1880.— Pleuro-Pneumonia of Cattle, by Dr. John 

 Gadsden. 



Jan. 15th, 1880. — The Microscope as a means of Investigation, 

 by Dr. Carl Seller. 



Feb. 2d, 1880.— The Preparation of Material for Microscopical 

 Examination, by Dr. Seller. 



Feb. 2d, 1880. — Nuclei of the Eggs of the Common Limpet, by 

 Mr. John Ryder. 



Feb. 2d, 1880. — Observations upon the Nervous System of the 

 Common Centipede, hj Mr. John Ryder. 



Feb. 2d, 1880. — Observations upon a specimen of Actinoptae- 

 riuvi, by Mr. Edward Potts. 



Feb. IGth, 1880. — The Mounting of Microscopic Objects, by Dr. 

 Seller. 



Feb. 16th, 1880. — Description of Rhipidodendroyi and Halteria, 

 b^'- Mr. John Ryder. 



