430 



concluding his remarks, Mr. Scourfield referred to the vexed 

 question of the motion of diatoms, and, among other points, 

 hoped that the cinematograph would be employed in the record- 

 ins: of these different methods of locomotion. The lecture was 

 illustrated by a number of diagrams and photographs of the 

 forms referred to, and by several autochrome photomicrographs 

 of water-mites lent by Mr. Taverner, F.R.M.S. 



The President said the most active amoeboid movements were 

 exhibited by certain cells — star-shaped, and with long, slender 

 processes — found in the body-cavity of the sea-urchin. There 

 was also found a lumpy form, best described, perhaps, as 

 "potato-shaped." These had a red coloration, and were very 

 interesting to watch. The relation between pseudopodia and 

 flagella was very difficult to decide. Many primitive forms 

 began life with flagella, and subsequently lost them and developed 

 pseudopodia. 



Mr. F. P. Smith (Hon. Editor) would strongly recommend 

 the use of the cinematograph in this connection. It was, 

 however, unfortunate that Entomostraca, for instance, objected 

 strongly to the enormous actinic power of the illuminant which 

 the speaker had found it necessary to employ. 



