FIFTY-FOURTH ANNUAL REPORT. 179 



group. The Chingford excursion on April 26tli was not so for- 

 tunate, the favourite pools being almost dry. On May 10th, by 

 the kind invitation of our President, Dr. Rendle, F.R.S., the 

 Botanical Section of the British Museum, Cromwell Rd., was 

 visited, when the President exhibited and described some of the 

 unique treasures of the Collection. A most successful excursion to 

 Greenford and Han well on May 24th was enjoyed by only fifteen 

 members, who took Lofhofus crystallinus in great abundance, 

 Plumatdla repens, P. fungosa and a good selection of Desmids, 

 Staines was visited on June 10th, but two of the favourite ponds 

 were dried up and the large pond on the Common did not yield 

 anything remarkable. On June 28th, for the first time since 1913, 

 the East London Waterworks were visited, but owing to the 

 cleaning of the reservoirs and the removal of the filamentous 

 algae and other water plants from the margins, some of the 

 good things usually taken here were not found. Only ten 

 members participated in the successful excursion to Northwood 

 and Ruislip on July 12th, when Fredericella sultana and Paludi- 

 cella were found in abundance. A party of twenty-five, on 

 July 26th, was well rewarded at the Richmond Park excursion 

 by good finds at the favourite ponds. The Eagle Pond, Snares- 

 brook, and the Lake, Highams Park, were visited on August 16th, 

 when Volvox aureus and three species of Polyzoa were taken. 

 The last excursion of the season was to Hampton Court, on 

 September 6th. After crossing the Thames the pond inside the 

 field in which Plumatdla repens had formerly been found in abun- 

 dance was dried up ; some statoblasts, however, were gathered 

 from a damp spot on the bottom, and some free-swimming 

 Rotifers, including Noteus quadricornis , were taken. In the large 

 pond, the Round Pond and the Long Water, Ophridium versatile, 

 three species of Polyzoa and a good selection of Desmids, as well 

 as Melicerta, Stephanoceros and Floscularia, and free-swimming 

 Rotifers including Pterodina, were collected. 



On the kind invitation of Dr. and Mrs. Leeson, the party was 

 entertained to tea at Clifden House, Twickenham, when the 

 rareties in the garden and in the, library were duly shown and 

 described by the genial doctor, and a vote of thanks to our host 

 and hostess was accorded on the motion of Mr. Peter Lawson, 

 thus bringing to a close a most enjoyable excursion. 



Thanks to the kindness of the President, Dr. Rendle, F.R.S., 



