PROCEEDINGS OF THE SOCIETY. 
393 
Mr. C. Baker : 
Double-stained vegetable tissues. 
Zeiss’s oil-immersion 
Micro-photograpli, referred to at p. 300. 
Mr. Tlios. Bolton : 
Ojjhrydium longipes, Ceplialosiplion, Stephanosceros, and other 
Rotifers. 
Rapliidioplirys pallida — a Rhizopod new to this country. 
Of this genus, Professor E. Ray Lankester writes : — “ It was 
founded by Mr. Archer, of Dublin, who described a fine green 
specimen in the ‘ Q. J. Mic. Sc.,’ 1869 (plate xvi.). It is charac- 
terized by having a single excentric nucleus, surrounded by 
dense protoplasm in which are three or four contractile 
vacuoles ; outside this is a gelatinous investment, and in this are 
imbedded slightly curved siliceous spicules in masses. Delicate 
filamentous pseudopodia radiate through the gelatinous coat, 
and as in Actinosphaerium send fibrous continuations to a central 
point in the protoplasm. 
This species is colourless, Archer’s species is green. I have 
seen all these points of structure to-day by treating the speci- 
men on the slide of the microscope under cover-glass, first 
with osmic acid, then with picro-carmine, and then alternately 
with glycerine and water. The glycerine prevents the spicules 
being seen, being of the same refractive index, but renders the 
protoplasm clearer. The nucleus is only seen well after 
staining. The form is highly interesting, and one I was very 
glad to see.” 
Mr. Frank Crisp ; 
Zentmayer’s double-stained and other preparations from the Paris 
Exhibition, with Zentmayer’s “ Centennial ” stand and diatom 
stage. 
Professor S. P. Thompson’s Strobic Circles. 
Mr. Thos. Curties : 
Sections of stipes of ferns by M. Kruitcheruit, of New Orleans. 
Mr. W. G. Cocks : 
A singular caterpillar found on the Eucalyptus in Adelaide. 
Mr. H. Crouch : 
New objective for dissecting microscope. 
New microscope for students’ use. 
Spencer and Sons (New York) and ^ dry and immersion 
objectives, ^-in. dry ditto, for which the gold medal was awarded 
at the late Paris Exhibition. 
Mr. Bolton’s new microscope revolving tables (2). 
Mr. Enock : 
Various tongues of Hymenoptera, prepared without pressure. 
Dr. Edmunds : 
The four-faced immersion prism (with faces inclined at 60°, 49°, 
41°, and 30°), referred to at p. 309. 
VOL. I. 2 E 
