48 PROCEEDINGS OF THE 



molofi relate to my description of the development of capillitium 

 in a maturing sporangium of Lamproderma columhinum, as 

 observed by me under the microscope. So far as the process 

 was visible, development proceeded by rapid but intermittent 

 movements, brief intervals of quiescence alternating with sudden 

 extensions of branching threads ; but there is no doubt whatever 

 that these intermittent appearances were produced by a perfectly 

 continuous and uninterrupted series of events. Actual breaks 

 in thf> continuity of natural processes being, to me, unthinkable, 

 I imf^gine that ' jumps ' in Nature can only be changes of direc- 

 tion or velocity ; and therefore Sir Nicholas and myself seem to 

 be virtually in agreement. When Arithmology is more advanced 

 it maybe possible to determine whether ' discontinuity,' as defined 

 by mathematicians, has any relation to biological processes. If 

 it has, biologists will be specially interested in its application to 

 certain vital problems ; but we must ' wait and see.' " 



The Secretary read a paper by Mr. Theodore Garnett, M.A., 

 on Notops brachionus, var. spinosus. 



In the month of September 1918 Mr. Garnett had the good 

 fortune to find in a small mountain tarn in North Lancashire 

 (about 450 feet above sea-level) a rotifer which he believed 

 to be a new variety of Notops brachionus, but his attention has 

 since been drawn by Mr. David Bryce to a note by Mr. Charles 

 F. Rousselet to Mr. T. Kirkman's paper : " List of some of the 

 Rotifera of Natal" {Journal R.M.S. 1901, pp. 229 to 241), 

 which describes " a small variety of Notops brachionus. possess- 

 ing two small hollow spines at the latero- posterior angles of 

 the body, which seems to be widely distributed in South Africa," 

 and which he named Notops brachionus var. spinosus. 



Mr. David Bryce said that he was glad to be able to welcome 

 Mr. Garnett as a new writer on the Rotifera, and complimented 

 him on being the first to record this rotifer for the United 

 Kingdom. 



The President then called upon Mr. T. E. Wallis to read his 

 paper on " The Use of Amylic Alcohol and Sandarac in Micro- 

 scopy," describing the use as a mounting medium of a solution 

 of sandarac (or gum jumper) in amylic alcohol. Sandarac is a 

 resin obtained by incision from the stem of Callitris quadrivalvis, 

 it is pale yellow, hard and brittle. The refractive index is a 

 little less than that of the dried resin of Canada balsam, and 



