"oSraLlAJSfS'] rKOCEEDINGS OF SOCIETIES. 223 



tuherosa, Vorticella microstoma, Vaginicola crystallina, Kerona mytilus, 

 Astasia limpicla, Amoeba princeps. 



The paj^er was illustrated by large cli-awings from life of tlie 

 various species alluded to. 



A very beautiful Eotifer, not figured either iu Pritcbard or tbe 

 Micrographical Dictionary, was also described by tbe author, its cilia 

 being as fine as those Melicerta ringens. It is generally found en- 

 sconced in a gelatinous matter, combined with decayed vegetable 

 substance, in the fork of the leaves of Anacharis. 



The habits of a voracious parasite, Tracliel'ias vorax, which attacks 

 Brachionus BaJceri, were illustrated by diagrams. The Trachelias in 

 a quarter of an hour entirely destroys the interior of the Eotifer, and 

 leaves only its empty shell ; and in one instance the Trachelias was 

 seen to divide itself into foiu- while in the interior of the Brachionus, 

 quitting the empty shell in sections. 



The author, in conclusion, hoped that the short sketch he had given 

 would tend to awaken an interest in this easily accessible pond, and 

 that other members might be induced to examine for themselves the 

 life-history and developments of these interesting living forms. 



The meeting concluded with the usual conversazione. 



TuNBEiDGE Wells Microscopical Society.* 



The monthly meeting took place on Tuesday, March 1, at the 

 Eev. W. W. Elwes' residence ; the President, Dr. Deakin, in the chair. — 

 The subject for consideration was Diatoms, which was opened by a very 

 interesting address from the chair, explaining their peculiar structure 

 and appearance under the microscope, and their mode of reproduction. 

 Some very beautiful specimens were exhibited. The same subject will 

 be pui-sued at the next monthly meeting. 



Two new members were elected. 



Aberdeen Microscopic SociETY.f 



The Aberdeen Microscopical Society met in the grammar-school 

 on Tuesday, 8th March, Dr. Ogilvie in the chair. — After the ordinary 

 business, Mr. Clark and Mr. Leys occupied the evening, tbe former 

 on the classification and arrangement of the Society's Cabiaet and 

 Catalogue, the latter on the Sea Urchin (Echinus lividus), giving a 

 brief outline of the shell spines and other appendages of the skeleton. 

 He then described his mode of cutting and grinding the spines as 

 longitudinal and transverse sections. After some remarks by the 

 chairman and other of the members, a vote of thanks to Messrs. Clark 

 and Leys was unanimously recorded. 



Keading Microscopical Society.^ 



15th March, 1870. — Captain Lang presided, and exhibited speci- 

 mens, mounted in balsam, of his Difflugia triangulata, and of another 



* Eeport supplied by Eev. B. Whitelock. 

 t Eeport supplied by Mr. W. J. Johnston. 

 X Eeport supplied by Mr. B. J. Austin. 



