142 



proved to be Oscillator ia tenuis. Plants of this genus grow 

 in a sheet on the mud at the bottom of ponds, then under 

 the influence of light they produce bubbles of gas, which, 

 being entangled among the filaments, float the mass to the 

 surface. On the mud of a partly dried ditch, Anabaena was 

 taken, and several species (or varieties) of the common 

 Euglena. Tea was obtained at Oxshott before the return to town. 



NORTHWOOD. 



The excursion on June 25 th to North wood was quite spoiled 

 by the weather. On leaving the station it seemed hopeful 

 and there was even a gleam of sun ; but after a short time 

 had been spent at the first pond, clouds came up, and shelter 

 had to be taken under a hedge from a tremendous downpour 

 and heavy thunderstorm. After about half an hour of this 

 the majority decided it was useless to go on, and most of the 

 party returned to Northwood for town. 



Chingford (July 9th). 



Richmond Park. ^ 



The excursion to Eichmond Park on Saturday, July 23rd, 

 was favoured with fine weather, and there was a fair attendance 

 of members. Samples were taken from the pond at Ham 

 Gate, from the larger of the Pen ponds, the Leg of Mutton, and 

 Bound ponds. There was plenty of microscopic life, but the 

 chief feature seemed to be the extreme abundance of Stejjhanoceros 

 eichJiornii, Flosculaona ornata, F. campanulata, and (Ecistes. These, 

 as is commonly the case, were chiefly found on Myriophylluni. 

 Perhaps owing to the beauty and interest of these grander 

 examples of microscopic life, no record was taken of more ordinary 

 organisms. It was noticed, however, that the water in a quiet 

 corner was rendered green by the presence of Microcystis, an 

 exceedingly minute plant that sometimes exists in such quantities 

 as to be obvious. Tea was obtained at one of the hotels in 

 Eichmond, and the return to town was, owing to the beautjful 

 evening, reluctantly made. 



