387 



Mr. A. Earland : Fragments of an unknown organism, prob- 

 ably a new genus of Eoraminifera, showing selective instinct in 

 a highly advanced degree. The fragments shown are evidently 

 parts of a tubular shell, built up entirely of broken sponge spicules 

 neatly cemented together side by side with the fine mud cement 

 characteristic of some Astrorhizidae. Instances of selective 

 instinct in shell-building are well known in several genera of 

 Eoraminifera, but the construction is in all cases more or less 

 haphazard. In these specimens, however, care has been taken to 

 select broken spicules of approximately equal size, and to build 

 them up in such a manner that, like the bricks in a wall, the 

 various courses shall not lie in the same line. Erom Atlantic, 

 off S.W. Ireland. Depth unknown. 



August 1st, 1902. 



Mr. H. Morland : Anvphitetras elegans Grev., from fossil deposit 

 at San Redondo Beach, South California, showing valves and 

 frustule. 



Mr. A. Earland : Types of adventitious shell structure of 

 varying degrees of refinement in Eoraminifera. Genera : 

 Ilaplophragmium, Trochammina^ Reoj^hax, Textularia^ Hormosina. 



Mr. K. J. Marks : Salpina macracantha Gosse, from pond near 

 Neasden. 



August 15th, 1902. 



Mr. T. G. Kingsford : Living specimens of young Marine 

 Mussels, showing action of gills. 



Mr. A. Earland : Head of cysticercus of the Hare, showing 

 booklets. 



Mr. T. N. Cox : Sugar of Milk, shown with polarised light. 



September 5th, 1902. 



Mr. C. Turner : Legs of Gyrinus natator, showing the paddle 

 expanded and shut as in the act of swimming. 



Mr. C. J. H. Sidwell : Tongue of Crane Ely, Tipula oleracea, 

 viewed from below. The " pseudo-tracheae " are deep-channelled 



