442 SUPPLEMENT. 



It is only in the exterior and more consistent portions of 

 the frond that the cysts are clearly visible ; they are usually 

 spherical, but occasionally elongated and pointed at each end, 

 the contained granules being likewise elongated, and small, 

 almost abortive. 



COCCOCHLORIS OBSCURA Hass. 



Plate cm. Fig. 5. 



Char. Granules small and circular. Cysts also small. 



Hah. Limestone rocks, co. Antrim : Mr. Moore. 



The granules and cysts in this species are much smaller 

 than in Coccocliloris cystifera, and not unfrequently a little 

 difficulty is perceived in detecting them. 



" The Observations which have been made in these latter Times by the 

 help of the Microscope since we had the' Use and Improvement of it, 

 discover a vast Difference between Natural and Artificial Things. What- 

 ever is Natural, beheld through that, appears exq^uisitely form'd and 

 adorn'd with all imaginable Elegancy and Beauty. There are such in- 

 imitable Glidings in the smallest Seeds of Plants, but especially in the 

 Parts of Animals, in the Head or Eye, of a small Fly ; such Accuracy, 

 Order, and Symmetry in the Frame of the utmost minute Creatures, a 

 Louse, for Example, or a Mite, as no INIan were able to conceive without 

 seeing of them. Whereas the most curious Works of Art, the sharpest 

 and finest Needle, doth appear as a blunt rough Bar of Iron, coming from 

 the Furnace, or the Forge. The most accurate Engravings, or Emboss- 

 ments, seem such rude, bungling, and deformed Work, as if they had 

 been done with a Mattock, or Trowel ; so vast a difierence is there be- 

 twLxt the Skill of Nature, and the Rudeness and Imperfection of Art. 

 I might add, that the Works of Nature, the better Lights and Glasses 

 you use, the more clearer and exactly form'd they appear, whereas the 

 Effects of humane Art, the more curiously they are view'd and examin'd, 

 the more of Deformity they discover." — Ray. 



