288 



diagnosis of the genera and species, illustrated by very numerous 

 tiny, but exceedingly clear figures. The printing also was most 

 beautifully done. These books could be obtained at Messrs. 

 Dulau's, Soho Square, and were quite inexpensive — five or 

 six francs — and easy to read. Other volumes were to follow. 



Mr. H. W. King read a paper on Monstera deliciosa, a 

 climbing plant of the genus Aracese, order Spadiciflor^, possess- 

 ino- some peculiarities of structure, of microscopical interest. 

 The paper was illustrated by well-executed coloured diagrams. 



The President said Mr. King's communication was of con- 

 siderable value, and had evidently been very carefully worked 

 out ; but from the great detail in which the interesting points 

 had been examined, some amount of study was necessary to 

 quite follow it out, which they would be able to do when 

 printed in the journal, and he was sure those who had listened 

 with attention to Mr. King's paper would desire to pass him a 

 very cordial vote of thanks for it, which was done. 



Mr. Ingpen read a note on Mr. Wenham's method of obtaining 

 oblique illumination of structures, such as scales and diatoms, 

 under high power. This was brought out as long ago as 1875, 

 and by reminding the members of it, perhaps some of them 

 would further experiment with it. The simple apparatus was 

 exhibited, and its use explained by a drawing on the board. Mr. 

 Ingpen said there was another small appliance, which, he 

 thought, had undeservedly fallen out of use, viz., Marshall's 

 zoophyte trough or life-cell. It was made by fixing any sized 

 circular cell to a slip, and cementing over one-half of this cell a 

 semi-circular piece of thin glass, thus it could be used as an 

 ordinary trough when inclined, or an open cell when lying flat. 



A Member thought perhaps it had been neglected from the 

 difficulty there might be in cleaning the covered in part ; but 

 Mr. Ingpen said it was quite easy to clean under the thin glass 

 by a camel-hair brush or strip of blotting paper. 



A vote of thanks was passed to Mr. Ingpen. 

 The President reminded members that this was the last 

 meeting of the session, and he wished them all a pleasant 

 vacation, with the hope that it would be spent in providing 

 material for discussion on future occasions. 



The usual announcements were then made, and the proceed- 

 ings terminated. 



