172 



DESIGN IN NATURE 



PLATE LXXI 



PLATE LXXI (continued) 



the power possessed by auiitialcules of changing shape and of circulatinij endoplasui. The circulation of living matter in a given 

 direction by a zooid is a new factor and is to be regarded as a fundamental endowment (the Author). 



Figs. 12 and 1.3. — Lophomotms striata and Lophovwnas hlattarum with brush-like flagella-fascicles, x 800 (ButschH). Fig. 13 

 shows beautiful spiral formation. 



Fig. 14. — Hexamita rostrata with four anterior and two posterior flagella, x 6,50. 



Figs. 16 and 16. — Animalcule (Hexamita inflata) dividing by longitudinal fission, x 6.50. 



Fio. 17.— Sinular animalcule gyrating upon its attached posterior flagella and producing a beautiful spiral. The spiral is reversed 

 at intervals, x 1000 (W. S. Kent). 



Fig. 18. — Animalcule (Callodictyon triciliatum) enveloping a vegetable fibre, x 400 (Carter). 



Fig. 19. — Animalcule (Atractonema teres), pli, Pharynx and vibratile flagellum ; cv, contractile vesicle ; n, nucleus ; a, amylaceous 

 corpuscles, x 640 (Stein). The direct connection of tlie pharynx with tlie contractile vesicle shown in this figure proclaims the 

 advent of a stomach and heart in the higher animals, each endowed with independent rhythmic movements (the Author). 



Fig. 20. — The same dividing by longitudinal fission. 



Fig. 21. — The same with flagellum absent and endojilast enlarged and broken up into germinal elements (g). ph, Pharynx ; 

 cv, contractile vesicle ; a, amylaceous corpuscle. 



Fig. 22. — Animalcule (Phialonema njclostomuni) with spirally ribbed cuticle, x 500 (Stein). Illustrates spiral structures in low 

 animal forms (the Author). 



Fig. 23. —Normal extended animalcule (Eiiglena qnrugyra). aa, Amylaceous corpuscles ; «, nucleus ; cv, contractile vesicle ; e, eye- 

 like pigment spot (W. S. Kent). Shows oblique spiral markings (in surface of body (the Author). 



Fig. 24. — Animalcule (Englena oxyuris), x 200 (Stein). Shows beautiful spiral arrangement well adapted for swimming. Spiral 

 structures and spiral movements appear very low down in the scale of being (the Author). 



Fig. 25. — Spirally twisted non-flagellate animalcule (Phacus longicaudm), x 300 (Stein). 



