JOURNAL OF MICaOSCOPICAL SCIENCE. 



EXPLANATION OF PLATES XXI & XXII, 



Illustrating Mr. Archer's Resume of Recent Contributions 

 to our Knowledge of " Freshwater Rhizopoda." 



PLATE XXI. 



Fig. 1. — Ciliophrys iiifusionmn, Cienk. ; a, b, c, d, in the motionless 

 state {n, nucleus with nucleolus ; v, contractile vacuoles) ; e,f, g, h, zoo- 

 spores, /still retaining some pseudopodia («, nucl. ; v, vacuoles), x 700 (?) 



Fig. 2. — Astrococcus n/fits, GreeiF. x 700. 



Fig. 3. — Astrodisculus ruber., Greeff. x 600. (The colouring of the 

 central body and of the round granules external to it has not been ren- 

 dered of a sufficiently highly rubyred colour to be quite in accordance 

 with Greeff's original figure.) 



Fig. 4. — Elaeorhanis cincia, Greeff. x 600. 



Fig. 5. — Pviaciophorajluciatilis, Greeff; a, outer siliceous 'skeleton;' 

 b, inner body-mass ; c, pseudopodia. About X 400. 



Fig. 6. — Acanthocyatis aculeata., Hertwig et Lesser ; k, endosarc ; r, 

 ectosarc ; c, c, contractile vacuoles ; b, a pseudopodiura contracted (owing 

 to some shock) ; the figure is drawn, as it were, through an optical section 

 of the body ; the nucleus, mostly rendered evident by acetic acid, has 

 been left out of the drawing because in the example the authors sketched, 

 as is the case mostly in the fresh state, it was not visible. (The ampli- 

 fication not stated, beyond that the figure was drawn under " Zeiss. F. 



Oc. in.") 



Fig. 7. — Acaui/wrys/is /lava, (ireeff. (x 400?) 



Fig. 8. — Acanthocystis spinifera, Greeff; k, endosarc ; r, ectosarc ; «, 

 nucleus, after treatment with acetic acid; after Hertwig and Lesser, 

 (Drawn under same amplification as Fig. 6.) 



Fig. 9. — Z?7//oc<?//« _{//(?(5o,sa, Eilhard Schulze. X 600. 



Fig. 10. — Pbiacocysds rubicuada, Hertwig et Lesser; fc, endosarc; 

 r, ectosarc ; n, nucleus. (Drawn under same amplification as Fig. 6.) 



Fig. 11. — llelerophrys variwis, Eilh. Scliulze. An example surrounded 

 by the gelatinous envelope with four dark granules and some food par- 

 ticles. X 400. 



(This is the same rhizopod as that called Ueliophrys variabilis by 

 Greeff, see ligs, 15 — 18 ; inasmuch as it is not ahomaxial form, it is not a 

 Htiliozoan, tlicrefore it should not be relegated to Ileterophrys ; hence 

 Greeff's name, so very nearly like, indeed, lo that of Schulze, should 

 stand.) 



Fig. 12. — Same, a naked reptant animal, containing four evident 

 nuclei and a number of pulsating vacuoles towards the marginal region. 

 Granules are not present ; on the other hand, two diatoms incepted as 

 food. X 600. 



