203 



the Nummulites, or it may be almost identical as in Pohjstomella. 

 Megalospheric specimens are always more abundant than 

 microspheric. Lister examined 2,000 specimens of Polystomella 

 crispa, and found the proportions were as 34 megalospheric to 

 1 microspheric. Mr. Earland then gave a short resume of 

 Mr. Chapman's paper. 



At the meeting of the Club held on June 21st, 1907, Dr. E. J. 

 Spitta, President, in the Chair, the minutes of the meeting held 

 on May 17th were read and confirmed. 



The thanks of the meeting were accorded to Messrs. C. Lees 

 Curties, junior, H. O. Green, W. O. Walker, and 0. Pells for an 

 exhibition of microscope accessories, etc. There were shown 

 micrometers, the Traviss expanding spot for dark-ground illu- 

 mination, two stands exhibiting objects by polarised light — the 

 analyser being in each case a tourmaline instead of a second 

 Nicol, and on one stand a block-glass polariser was used with 

 a tourmaline analyser. The cheapness of the tourmaline over 

 the usual Nicol, owing to the very small size (about g in.) required, 

 was pointed out. The method employed in arranging diatoms, 

 etc., in symmetrical groups was shown, and two forms of an 

 interesting accessory (an auxiliary objective used at the bottom 

 of the draw-tube) — one for converting the microscope practically 

 into a short-focus telescope to be used for exhibiting the whole 

 of large objects which required magnification not greater than 

 about ten diameters, and another, useful for dissecting, which 

 permitted the use of higher powers. Both forms gave erect 



images. 



Mr. C. F. Rousselet, F.R.M.S., read a paper on " Brachionus 

 sericus, n.sp., a new variety of Brachionus quadratics, and remarks 

 on Brachionus rubens, Ehrenberg." 



Mr. W. Gardner said he thought members would be very 

 thankful to Mr. Rousselet for clearing up the difficulty of the 

 incorrect figures in Hudson and Gosse. When he began to study 

 this group, some years ago, he soon found several instances in 

 which the descriptions of species did not agree with the figures. 

 He also had found B. rubens always associated with Daphnia. 



Mr. D. J. Scourfield suggested that the habit of B. rubens 

 •of " riding " upon Daphnia might not indicate a higher state of 



Jourx. Q. M. C, Series II. — No. 61. 15 



