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EXPLANATION OF PLATES I AND II. 
Illustrating Messrs. Harper and Dodge’s paper on Formation of the Capillitium in Certain 
Myxomycetes. 
The figures in Plate I were drawn with the aid of the camera lucida, from preparations stained 
with the triple stain — Figs. 1-4 with Zeiss apochromatic obj. 2 mm. n. ap. 4, ocular 8; Fig. 5 with 
obj. 3 mm. n. ap. 1-3, ocular 12. 
The microphotographs in Plate II were made with the Zeiss apochromatic objectives 3 mm. 
n. ap. 1-3, and 8 mm., and the compensating oculars Nos. 4, 6, and 8. Figs. 8, 14, and 15 are from 
preparations stained with iron-haematoxylin. The other figures are from preparations with the 
triple stain. In the latter case a green ray filter was used. 
PLATE I. 
Fig. 1. Hemiarcyria clavata. Shows fibrils from adjacent systems crossing. Granules in series 
and quite separate from the capillitial vacuoles. The latter with very dense content so that their 
outlines are scarcely discernible. 
Fig. 2. Trichia sp. Shows distribution of granules and fibrillar systems in longitudinal section 
of capillitial thread. 
Fig. 3. Hemi. clavata. Shows long fibrils extending out between the nuclei. 
Fig. 4. Hemi. rubiformis. Capillitial vacuole larger than final diameter of the thread. Fibrils 
very numerous and delicate. Those fibrils which appear to anastomose in this and the other 
drawings really lie in quite different focal planes. 
Fig. 5. Hemi. clavata. Capillitium well differentiated, spiral bands running in the 
direction of the thread of a left-handed screw. Another capillitial thread which bends down into 
C 
