PKOCEEDINGS OF THE SOCIETY. '255 



directing special attention to the animal types of a green colour. In 

 most cases these green animals were found to owe their characteristic 

 colour to the presence, just under the ectosarc or ectoderm, of symbiotic 

 algte usually known as zoochlorell^. Such cases occurred among the 

 Rhizopoda in some species of Dlfflugia, etc. ; among the Heliozoa in one 

 species of Raphidiophrys ; among the Ciliata in species of Stentort Para- 

 ?nsecium, Vorticella^ Ophrydium, etc. ; among the Hydrozoa in Hydra 

 viridis, H. igneus, etc. ; and among the Turbellaria in DalyelJia viridis, 

 etc. It was evident that a number of interesting questions arose out of 

 this peculiar association of animals and plants, the solution of which 

 would almost certainly yield results of fundamental biological import- 

 ance. 



Closely connected with the colour of organisms was the mode of its 

 distribution over the surface of the body. When this was not uniform 

 it usually gave rise to some kind of pattern, and this was an important 

 but very obscure subject upon which a good deal of light could 

 undoubtedly be thrown by a study of small aquatic creatures in which 

 colour patterns occurred in their simplest forms. 



Proceeding to refer in detail to the actual exhibits, Mr. Scourfield 

 made special mention of the abnormal specimens of Simocephalus vetidus, 

 shown by Mr. Cannon, which had been produced by feeding upon a 

 species of Chlamydomonas . These were similar to those described by 

 Prof. Agar in an important paper in the Transactions of the Royal 

 Society on the inheritance of acquired characters in certain species 

 of Entomostraca, etc. 



On the motion of the President, a hearty vote of thanks was 

 accorded to the Members of the Quekett Microscopical Club, and to the 

 Fellows of the Royal Microscopical Society who had kindly exhibited 

 specimens, and to Mr. Scourfield for his remarks. 



The President announced that the next Meeting of the Biological 

 Section would be held on June 2, when Mr. Scourfield would read a 

 communication on " Zoochlorellae." 



The business proceedings then terminated. 



List of Pond-Life exhibits — 



Mr. A. J. Bowtell . . Vorticella sp. 



^Ir. H. G-. Cannon . Simocephalus vetuhis, showing abnormality, 



similar to that described by Prof. Agar 

 in Trans. Roy. Soc, produced by feeding 

 on a species of Chlamydomonas. 



Mr. F. W. Chipps . . LojJhopiis cry stall i/ms^ahoBatrachosjwrmiim. 



Mr. H. GouUee . . Larvae of Tamjpus just emerging, also 



young newt. 



Mr. C. E. Heath . . Lophopus crystalUnus. 



