342 



THE ZOOLOGIST. 



Pool. On all such occasions the numbers of specimens obtained 

 were less than the number of specimens of B. pala from 

 Coxpond. It would not be an exaggeration to say that, in the 

 last case, every cubic millimetre of water in the sample bottles 

 contained a dozen or more specimens, some being especially 

 fine and large. The lorica of one of the largest examined was 

 -^ in. long. Many of them were carrying eggs, some a single 

 one, and others two. In most of the specimens the mastax was 

 of exceptionally large size. 



Fig. 11. Fig. 12. 



19. Diplax trigona, Gosse. — This Eotifer was not obtained 

 until March 26th, 1914, when two specimens were seen during 

 a careful examination of the washings from a fine silk net 

 through which about two quarts of water from Langleybury 

 Pool had been passed. One of the specimens was being 

 examined, and was swimming about slowly, occasionally turn- 

 ing on its side or plunging so as to show its somewhat 

 triangular outline, when it was very suddenly attacked by a 

 young Cyclops, which abandoned it after a few seconds. So 



