346 



OBJECTS EXHIBITED, WITH NOTES. 



February 3rd, 1899. 



Mr. A. L. Still : A mounted colony of Ohelia (Obelaria) 

 gelatinosa, Hincks, taken at Burry Holmes, Glamorgan, in 

 April 1898. The method employed for fixing consists in adding 

 a few drops of a 20 per cent, solution of cocaine to the bottle 

 containing the hydroids, and, when fully extended, gently stirring 

 in two or three drops of Osmic Acid (1 per cent.). In the case 

 of Obelia the bottle should be placed in sunlight for an hour, 

 while the cocaine is acting. Some hydroids, like Plumularia, 

 extend more readily, a few minutes sufficing. After killing, 

 the specimen should be placed in clean sea-water, and enough 

 formalin added to make the whole roughly a 2 per cent, 

 solution. 



March 3rd, 1899. 



Mr. A. L. Still : A specimen of Limnias cornuella found at 

 Henfield, Sussex, on February 28th, 1899. This species has not 

 hitherto been found in this country except in the Victoria regia 

 tank at the Eoyal Botanic Gardens. 



Mr. G. T. Harris : Thuricola operculata, Gruber, from Epping 

 Forest. Saville Kent, in his " Manual of the Infusoria," states 

 that this species has only been recorded by Gruber. Thuricola 

 operculata differs from T. valvata principally in having a well- 

 developed pedicle, this being in some specimens I have examined 

 of extraordinary length, though it is a very variable feature. 



Mr. B. Macer : A specimen of Raiyhignathus falcatus, Hodge. 

 Although belonging to the Halacaridae, a family of marine mites, 

 it was found in the fresh-water canal at Weybridge, Surrey, in 

 the autumn of 1898. There is a note and figure of this species 

 in Science Gossip), March 1899, p. 293. A noteworthy feature is 

 the distinct median eye. 



Mr. A. Earland : A collection of Badiolaria (fossil forms) from 

 Springfield, Barbados. Illustrating sixty of the more typical 

 forms. 



April 7th, 1899. 



Mr. H. Morland : A stained leaf of Pistia stratiotes, a West 

 Indian pond-weed, showing the raphides and sphaeraphides in 

 the cells. 



