1893.] NATURAL SCIENCES OF PHILADELPHIA. 563 



REPORT OF THE BIOLOGICAL AND MICROSCOPICAL 



SECTION. 



This Section during the year 1893, has held nine meetings ex- 

 clusive of those held in conjunction with the Academy. 



Four new members have been elected and two contributors have 

 been added to the list. One member and one contributor have 

 resigned. 



Interesting communications have been made by Messrs. Ryder, 

 Rex, Sharp, Anders, Brown and Rothermel. 



The officers for the ensuing year are : — 



Director, . . . . A. P. Brown. 



Vice Director, . 



Recorder, 

 Treasurer, 



Corresponding Secretary, 

 Conservator, 



Respectfully submitted, 



John C. Wilson. 

 M. V. Ball, M. D. 

 Chas. P. Perot. 

 John G. Rothermel. 

 Geo. A. Rex, M. D. 



Harold Wingate, 



Recorder. 



REPORT OF THE CONSERVATOR OF THE CONCHO- 



LOGICAL SECTION. 



During the year since the last annual meeting of the Conchologi- 

 cal Section the museum has been increased by many valuable acces- 

 sions. The number of species new to the collection, and of species new 

 to science has been unusually great. The series of mollusks preserved 

 in alcohol has been augmented by a greater number of species than 

 any previous year for probably over a decade. Accessions have been 

 received during the year from 56 persons, a list of whom is included 

 in the additions to the museum. 



The total number of trays added is 1,650. About 300 of these 

 having been acquired by purchase, an equal number by exchange, 

 and the remainder by gift to the Academy or the Section. These 

 do not include a collection of over 1,300 species of tertiary fossils 

 obtained from M. Cossmann of Paris in exchange for volumes 

 of the Manual of Conchology, which, with the addition of a col- 

 lection of fossil Helices received from Dr. Penecke of Germany, 



