101 



November IGth, 1900. 



Mr. C. F. Rousselet : Three species of As2)lanchna — viz., A. 

 amphora, A. hrigktioellii, and A. i7ite7^media, showing in each case 

 the (^, the $ , and the jaws. 



Mr. J. T. Holder : Kidney of Frog (bulk-stained borax carmine, 

 and section-stained Ehrlich's haematoxylin), showing cortical and 

 medullary portions, also the convoluted capillary blood-vessels 

 (corpuscles of Malpighi). 



December 7th, 1900. 



Mr. A. J. French : Specimens of the rare male of Bosmina 

 longirosiris, also females with winter eggs, from Richmond Park. 

 The antennules of the male, instead of being rigid, as in the 

 female, are distinctly articulated to the head. 



December 21st, 1900. 



Mr. J. Eheinberg : Three exhibits showing the peculiar 

 colour phenomena of Actinocyclus Ralfsii — (1) group of A. Ralfsii 

 under a 1-inch objective, showing the distinctive colour pheno- 

 mena by transmitted light ; (2) A. Ralfsii under a |-inch objective 

 by transmitted light ; the diatom appears colourless, but by 

 gradually closing the iris diaphragm above the objective the dis- 

 tinctive coloration shows itself, precisely as with the 1-inch 

 objective ; (3) A. Ralfsii under a |-inch objective by transmitted 

 light ; the diffraction spectra can be viewed by placing the small 

 wooden arrangement (see p. 63) over the cap of the eyepiece : the 

 direct central or dioptric beam is seen to be coloured. 



January 4th, 1901. 



Mr. C. F. Rousselet : A young specimen of Cristatella mucedo, 

 hatched from one of the statoblasts found at the Club's excursion 

 to the East London Waterworks on October 6th last. A solid 

 mass of these statoblasts, consisting of many thousands, was 

 exhibited by Mr. Scourfield at the meeting on October 19th. 



Mr. J. T. Holder : Section through snout of Foetal Rabbit 

 showing nasal cavities, etc. 



Mr. F. E. Filer : Longitudinal section through flower-bud 

 of Spurge Laurel, Dajohne laureola, showing ovule, etc. ; and 

 karyokinesis in cells in wall of ovary. 



