Picture - Cosmic Polymath

8 DESIGN IN NATURE
Fig. 12.—Hepatic cells with biliary duct between. Show pentagonal and hexagonal forms, chiefly the latter. Compare with
Pigs. 3, 4, and 13.
Fig. 13.—Hexagonal pigment cells from the choroid coat of the eye. Compare with Figs. 3, 4, and 12.
Fig. 14.— Pygidium of a flea with bristles. Shows concentric and radiating arrangement of the areolae (the Author).
Fig. 15.— Portion of sponge with spicules projecting from the surface. Shows branching, plant-like form (the Author).
Fig. 16.— Portions of shell of oyster {a), and egg of ostrich (J). Show radiating and concentric arrangements (the Author).
Fig. 17. a, Asterolampra marylandica, side view ; b, Heliopelta Leeuwenhmckii, side view. Show lieautiful concentric and
radiating arrangements (the Author).
Fig. 18. Euastrum ohloivjum. Shows rudimentary segmentation (the Author).
Fig. 19. Tdmemoi-us lasvis (in conjugation). Shows symmetrical form and augmentation.
Fig. 20. Staurastrum gracile. Shows triangular radiation.
Fig. 21. Micrasterias denticulata. Cell dividing transversely.
Fig. 22. a, Pediastrum boryanum. Shows stellate radiation and reticulated surface, b, Pediastrum granulahmi. Empty cell.
Fig. 23. Euastrum vernicosum. Shows symmetric radiation and tendency to segmentation.
Fig. 24. a, Gosmarium pyramidatum. Shows tendency to segmentation or division, b, Empty shell of same.
Fig. 25. Micrasterias denticulata (sporangium). Shows concentric and radiating branching arrangement (the Author).
Fig. 26. a, Tetmemorus yranulatus ; b, ditto, empty cell. Show symmetrical markings and tendency to segmentation.
Fig. 27. O'yrosigma strigile (side view). Shows central point and longitudinal and transveise markings.
Fig. 28. Pinnularia nobilis (side view). Shows central point and longitudinal, radiating, and transverse markings.
Fig. 29. Gyrosig-nui transversale. Shows central jioint and longitudinal and oblique markings which cross each other.
Fig. 30. Gyclotella operculata. a, Side view ; b, front view. Show concentric and beautiful radiating arrangement.
Fig. 31. Gyrosigma angulatum, (side view with endochrome). Shows longitudinal and central circular markings.
Fig. 32. Namcula didyma (side view). Shows central point and longitudinal and radiating markings.
Fig. 33. Gyrosigma littorale (side view). Shows central point and longitudinal striation.
Fis. 34. Meridian circulare. Shows frustules united into a spiral coil ; front view.
Fig. 35. Synedra splendens. Shows frustules attached at one end and radiating.
Fig. 36. Licmophora splendida. a, Frustules arranged in a radiating, branched, plant-like form; J, side view of single
frustule ; c, front view, ditto.
Fig. 37. Gocconema lanceolatum, presenting : a, a plant-like appearance ; b, single valve side view.
Fig. 38. Eupodiscxis sculptiis (side view). Shows central point with four sets of pear-shaped radiating markings, arranged at right
angles to each other.
Fig. 39. Amphora ovalis (front view). Shows longitudinal and radiating markings.
Fig. 40. Doryphora amphiceros. a, Side view of frustule with endochrome ; b, front view, ditto ; c, prepared single valve.
Fig. 41. Biddulphia aurita and frustules undergoing division (a, b, c, d).
Fig. ii.^Synedra splendens. a, Side view of prepared frustule ; b, front view of ditto. Show longitudinal and transverse
markings.
Fig. 43. Gomphonema acuminatum. Showing plant-like arrangement of parts.
Fig. 44. Getocholus septentrionalis (dorsal view). Shows segmentation of body, antennae, &