487 



OBJECTS EXHIBITED, WITH NOTES. 



October Srd, 1902. 



Mr. W. H. Langton : Proboscis of House-fly, showing openings 

 in pseudo-tracheae. 



Mr. K. J. Marks : CaUirlhia tetraodon Ehr. In S2)hagnum, 

 from a valley near Gorey, Jersey. The head has two frontal 

 prominences, and the toes are modified into a tube-like process, 

 ending in a perforated disc ; this occurs only in a few forms. 



Mr. D. Bryce : Callidina acideata Milne. Described in 1886 

 from specimens found in Scotland. Rare spinous form living in 

 moss. Lately found at Dunmow, Hendon, and Hollingbourne, 

 Kent. 



Mr. D. J. Scourfield : jVotodromas monacha, from Osterley Park. 

 An Entomostracon (Ostirtcod), having the power of clinging to 

 the surface-film of water. Note the straight ventral margin 

 which is applied to the surface-film, and the dark coloration of 

 the ventral parts of the valves. 



Mr. A. E. Hilton: Pollen of Gaillmxlia, showing the oval 

 granules studded with spikelets. 



Mr. H. Morland : Aulacodiscus orientalis,h'om. the Fiji Islands, 

 showing the cellules radiating from the centre, and arranged 

 concentrically round the same, causing^ them, where crowded, to 

 be somewhat quadrangular and never polygonal. First described 

 by Dr. Greville about thirty-nine years ago. 



Mr. H. F. Angus : An inexpensive apertometer, made by a 

 member of the Club, with which an objective listed as N.A. O'GS 

 was found to be only N.A. 0G4, this being afterwards confirmed 

 on a Zeiss apertometer. 



