MINUTE STRUCTURE OF PELOMYXA PALUSTRIS. 305 
DESCRIPTION OF PLATES 20 & 21, 
Illustrating Miss Lilian J. Gould’s paper, ‘‘ Notes on the 
Minute Structure of Pelomyxa palustris” (Greeff). 
Fic. 1.—General view of complete section of Pelomyxa palustris 
without details. Killed osmic acid, stained in bulk carm-alum. Zeiss, 
obj. B, comp. oc. 4; camera. 7. Ring of denser protoplasm. 2. Nuclei. 
v. Vacuoles. v.a. Vesicular area. 
Fic. 2.—Portion of section. Killed osmic acid, stained in bulk carm- 
alum. Zeiss, obj. E, comp. oc. 4; tube at 17 mm. z. Nuclei. v. Non-staining 
large vacuoles. fv. Food-vacuoles. v.v. Vesicles. yp. 1.4. Peripheral 
radiate border. 
Fie. 3.—Portion of section. Killed osmic, stained carm-alum, fuchsin, 
and eosin. Zeiss, obj. E, comp. oc. 4; tube not drawn out; camera. g. Re- 
fringent bodies. «. Nuclei. 4. Bacteria. s. Sand and débris. p.7. 2. Peri- 
pheral radiate border. d. Diatom. 
Fic. 4.—Teased-up portion of P. palustris in glycerine. Killed osmic, 
stained carm-alum. Zeiss, obj. E, comp. oc. 4; tube not drawn out; camera ; 
b. Bacteria. g. Refringent bodies. 2. Nuclei. pr. Droplets of protoplasm. 
Fig. 5.—Teased-up portion in glycerine. Killed osmic, stained picro- 
carmine. Zeiss, obj. E, comp. oc. 4; tube not drawn out; camera. 4. Bac- 
teria. g. Refringent bodies. x. Nuclei. 
Fic. 6.—Portion of section. Killed osmic, stained picro-carmine and 
picric turpentine. Zeiss, obj. E, comp. oc. 4; tube not drawn out; camera. 
g. Refringent bodies. gg. Dividing refringent body. x. Nuclei. 
Fic. 7.—Refringent bodies, to show rods in situ. Killed osmic, stained 
picro-carmine and dahlia. Zeiss, oil imm. 5, comp. oc. 4; tube at 17 mm. ; 
camera. z. Nuclei. 4. Bacteria. g. Refringent bodies. w. Wall of refringent 
body. 
Fic. 8.—Small portion of section, including bit of capsular region. 77. 
Width of ring. 7. pr. Protoplasm within ring. e. pr. Protoplasm external 
to ring. fv. Food-vacuoles. sg. Alveolar area represented in Fig. 10. 
Killed osmic, stained carm-alum and dahlia. Zeiss, oil imm. 3, comp. oc. 4; 
tube at 19 mm., finished with comp. oc. 8; camera. 
Fic. 9.—A. Nucleus, with surrounding radiate alveolar layer. Killed 
osmic, stained carm-alum. 3B. Refringent body, with surrounding radiate 
