744 PROCEEDINGS OF THE SOCIETY. 



The following Instruments, Objects, &c, were exhibited:— 



The Society : — A series of microscopic slides to illustrate Shell- 

 Structure : — Avicula, horizontal section ; Avicula, nacre ; Cardium 

 cardissa ; Corbuta tunicata ; Glycemeris, external layer ; Glycemeris, in- 

 ternal layer ; Hippurites, vertical section ; Lima scnbra, corrugated 

 structure ; L. scabra, tubular structure ; Mya arenaria ; Myodora striata, 

 internal layer ; M. striata, cellular structure ; Pema ephippium, hori- 

 zontal section ; Pinna, fossil, oolite, vertical and horizontal sections ; 

 Pinna ingens, horizontal section decalcified ; Pinna nigrina, horizontal 

 and vertical sections ; Pinna, prisms separated by disintegration of 

 membrane ; Pleurorhyncus hibemicus ; Solenomya australis, external and 

 internal layers ; Spondylus, internal and external layers ; Thracia, ex- 

 ternal and internal surfaces ; Unto occidens, cellular layer ; Vulsella, 

 horizontal section. 



Mr. A. N. Disney : — A circular Diffraction Grating and an Iridescent 

 Brooch. 



. Mr. E. M. Nelson : — Leitz' prism Erect-image Dissecting Micro- 

 scope. 



Mr. C. P. Eousselet : — An Electric Lamp for microscopic work. 



Mr. B. B. Woodward :■ — A series of slides illustrating Shell Structure. 



New Fellows. — The following were elected Ordinary Fellows of the 

 Society : — Messrs. Henry Dobson, Joseph William Williams, William 



Wyatt. 



