FIFTY-FIFTH ANNUAL REPORT. 245 



SO good, owing to the clearing of the larger vegetation from 

 the lake, only two specimens of polyzoa were found, while hydra 

 and volvox were conspicuous by their absence. 



The next excursion was on April 24th, Loughton and Chingford 

 being visited ; at Strawberry Hill Ponds many good catches 

 were made and over fifty different species of Desmids were 

 identified, including Roya obtusa. 



On May 8th, after an interval of thirty-five years, Mitcham 

 Common was visited by the Club, and those who took part in the 

 excursion were amply repaid with the abundance of their " finds " — 

 Stephanoceros, Floscularia, Melicerta, Limnias and many free- 

 swimming rotifers, including Colloiheca trifidlohata and the male 

 Collotheca cornuta. Many Desmids and the curious and elusive 

 Hydrodictyon reticulatum were collected. 



The next excursion was on May 29th to Greenf ord and Hanwell, 

 where the party expected to find Lophopus, as it was very abun- 

 dant last year, but not a single specimen was taken, although 

 some sticks on which there were many clumps last year were 

 fished up. 



On June 12th a party of twenty-three visited Northwood and 

 Ruislip. With the exception of Pedalion mirum nothing unusual 

 was found. It may be recorded that at 4 p.m., when the members 

 were returning through the wood, a thunderstorm of exceptional 

 severity came on, and the downpour of rain continued for more 

 than an hour. When the party reached the cottage where they 

 usually have tea, they found the house crowded out with other 

 excursionists who had also been caught in the storm, and they 

 had to partake of tea in the garden, under the shelter of a tar- 

 paulin. 



On June 26th Richmond Park was visited, when many good 

 " finds " were made, including Pedalion mirum and Conochilus 

 unicornis, and many species of Desmids. On the kind invitation 

 of Sydney V. Klein, Esq., F.L.S., the party called at Lancaster 

 Lodge, Kew Gardens, and were entertained to tea by Mr. and Mrs. 

 Klein. Mr. Klein, unable to take part in the excursion, had 

 arranged a number of specimens for exhibition and supplied the 

 members with Hydrodictyon, v/hich he found in abundance in 

 the lake in Kew Gardens. 



On July 10th, by special permission, the Club visited the 

 reservoirs of the Metropolitan Water Board, at Ferry Lane, 



