425 



with the cover-slip, thus minimising evaporation. It is not 

 intended for use with immersion systems. Mr. C. Beck had in 

 one instance kept under observation for ten days Actinophrys, 

 and was able to watch the entire life-history, getting at the 

 end of the time eleven individuals from the single specimen 

 started with. Mr. Eliot Merlin's form consisted of a real 

 Rousselet live-box with cemented cover-glass, and was, therefore, 

 airtight. It had thin glass below. The thickness of the cell 

 was adjusted by the number of rings of blotting-paper employed, 

 and the water was obtained from two small wells. Provision 

 was made for heating, and a thermometer was attached. It 

 was altogether a very convenient form, and was well adapted 

 for use with immersion objectives, which could be easily changed 

 without at all affecting the object. 



The President thought the new cell would be found very 

 useful. It seemed particularly suited for observations requiring 

 the maintenance of a given temperature, as when examining 

 organisms from the blood of warm-blooded animals. 



Mr. J. T. Holder intimated that at the "Gossip" meeting 

 to be held on December 18th he would have a number of sections 

 of coats of eyeball of pigeon in celloidin ready for staining, 

 which he would be pleased to give to members interested. A 

 small tube containing 70-per-cent. alcohol should be brought to 

 contain the sections. 



The Hon. Secretary (W. B. Stokes) wished to say a few words 

 with regard to some remarks by Mr. O'Donohoe at the last 

 meeting. Mr. O'Donohoe had really been misunderstood. He 

 was really announcing a new discovery, that the " white-dot ' : 

 image (of diatoms) required a different tube length from that 

 necessary with the " black-dot " image, and that the two images 

 of the Podura scale which he presented corresponded to the 

 " black-dot " and " white-dot " images of diatoms. 



Mr. D. J. Scourfield, F.Z.S., F.B.M.S., gave a lecture illus- 

 trated with lantern -slides on " The Locomotion of Microscopic 

 Aquatic Organisms." The lecturer proposed to give some brief 

 account of the various methods employed by microscopic aquatic 

 organisms, and of the conditions affecting locomotion under 



