332 PKOTOCOCCEiE. 



more or less rounded granules with scarcely any appearance 

 of jelly. " — i?e?Ve. 



The Aiiacijstis farfuracea would appear to be an entirely 

 different plant. 



14. HiEMATOCOCCUS LIVIDUS HaSS, 



Plate LXXXIL Fig. 5. 



Char, Crust of an indefinite extent, and livid colour. Granules 

 sphericalf green, small, solitary or hinate, and frequent, 

 quaternate, the quaternate granules being contained in 

 spherical cysts. 



Palmella livida Carm., in Grev. Flor. Edin. P. livida 

 Harv., in Manual, p. 178. Microcystis livida Meneghini, 

 Monographia Nostochinearum Italicarum, p. 74, 5. 



Hab. " On overhanging cliffs, covering them to an indefi- 

 nite extent with a dirty black scurf: " Captain Car- 

 michael. Found on limestone rocks near Poilballintrea, 

 CO. Antrim : D. Moore. 



The solitary and binate granules which constitute by far 

 the greatest portion of the plant are not enclosed in cysts, 

 and therefore do not appear to be surrounded by a trans- 

 parent limb or border. The granules however when asso- 

 ciated in pairs or multiples of that number are always enclosed 

 in a distinct cyst or vesicle, and occasionally it happens in 

 this as in other species of this division of the genus Hcemato- 

 coccus, that each of the contained granules is also furnished 

 with a distinct envelope. 



Mr. Moore writes of this species : — " This singular substance 

 covers the overhanging limestone rocks to a great extent, 

 sometimes as much as several hundred yards together. When 

 fresh, it looks like a blackish brown, gelatinous substance, 

 giving the rocks on which it grows the appearance of being 

 covered with pitch. On places where it becomes dry by 

 exposure to the sun, it is very friable, and on being touched 

 crumbles down to a powder. Under the glass it is found to 



