ARRANGEMENTS COMMON TO CRYSTALS, PLANTS, ANIMALS 



PLATE 11 



Fig. 23. Remarkable spiral crystals of suljihur obtained by cooling quickly on a microscope slide. These crystals resemble 

 the fronds of ferns and the horns of animals. A still more remarkable example of a spiral crystal is furnished by pi-ochlorite as 

 shown at p. 19, Fig. 7. 



§ 3. The Radiating, Dendritic, Segmented, Concentric and Spiral Arrangements common to Crystals, 

 Plants, and Animals. 



That the radiating, dendritic, concentric, spiral, and segmented arrangements witnessed in crystalhc combina- 

 tions reappear in plants is abundantly shown by an examination of the figures in Plate iii. ; and that the same 

 holds true of animals is made equally evident by constdting the figures of Plates iv. and v., especially the latter. 



PLATE III 



This plate shows a well-marked tendency in Hving things to aggregation, division, segmentation, and repetition 

 of parts ; to branching, to radiation, and to concentric and spiral distribution of their substance. The plants here 

 figured resemble the crystals shown in Plates i. and ii. There is a common plan for crystals, plants, and animals. 



Fig. 1. — Development of bacteria and vibrios on the surface of an organic infusion (J. H. Bennett), h, Molecular mass ; b, short 

 bacteria ; c, larger bacteria ; d, the .same more separated ; c, aggregation of vibrios ; /, chain-like molecular filaments 

 (Leptothrix). 



Fig. 2.— Conferva floccom. ", Fragment of growing filament; b, filament breaking up; c, zoospore capable of independent 

 movement. Shows segmentation (compare with e of Fig. 1). 



Fig. 3. — (Edogonium vedcahim. a, Fragment of a filament ; b, ditto, breaking up and emitting a zoospore ; .■, zoospore with 

 a crown of cilia. The zoospore is free to move. Shows division, segmentation, and repetition of parts, as in the Articulati and 

 Vertebrata. 



Fig. 4. — Sfigeoclonimn protensum. a, Fragment of branched filaments ; ft, germinating zoospore. Shows segmentation of filaments 

 and zoospore as in Fig. 3. 



Fig. 5. — Brachycladitim pmicillatuin. An erect filament with fertile branches. Magnified 200 diameters. Shows segmentation 

 and branching in a marked degree. 



Fi(j, 6. — Helicosporium pulvinatum, magnified 200 diameters, a, Branched filament; b, sporidia forming be.iutiful spirals. 

 a and b afford typical examples of segmentation. 



