22 T. ©. Hilgard—Infusorial Circuit of Generations. | 
way, rather scantily ‘‘fructifies” in a “ sexual” fashion, 1. e. by 
the development of a theca ; but on clayey soils fills all the slug- 
gish and stagnant waters with its virescent uliginous spawns ; 
while it covers the surface of fields, by millions of acres, with 
minute crust, or “ brick red leprosy,”* whose fine, molecular 
dust is swept aloft by every wind. Immediately before the frost, 
the same fields are densely covered with a small crop of minute 
hese minute, but in this instance coated, swarming cells are 
(or vibratory lash) arises, a clear point of substance ; wherein, 
in a small percentage of these cells, a parasite is found to 
develop. 
This parasite is a perfectly colorless globule, apparent in the 
clear navel-point of the cell, and exhibits a faintly opalescent 
hue. As it grows, the cell which harbors the “ incubus ” loses 
its own individual vitality. It ceases to swarm about and 
dissect into living, chlorophylliferous and automatous progenies, 
e live ones do. Instead of spontaneously dissolving as 1m 
the living process the cell-coat remains firm; and as the para- 
sitic animal yol ws and occupies more space, executin 
tremulous and vibratory contractions, the chlorophyll is press 
into the rear, a lifeless mass. At last the cell is ruptured in 
* See St. Louis Med. Reporter, Jan. Ist, 1867, pp. 522, 527—528. Also Proc. 
St. Louis Ac. Se. (July, 1861), vol. ii, No. 1, p. 160; and vol. i, p. 156. For 
“ Chiorococcum ” read “ : ” (lately renamed ‘ Protuberans” Ag. 
its “ botrydium” progenies. The latter collapse and turn red. This pulverulent, 
mintate ‘* ‘a kermesina” Auct., must, however, by no means be confoun 
with the darkly purpureous, uliginous moss-spawns which cover, e. g. the hilly 
“ Orange-sand ” regions of the State of Mississippi. It is prevalent in winter 
41 - red i“ Mi OC le ¢ ” 
Ww , and ists of matted i 
moss-cells, each one containing a central brood-fiber which is medullary-dott 
li ing, and fascicularly surrounded by a stratum us, prore 
“« Qscillaria ”-fibrils. Not ouly the ultimately enlarged (chlorophylliferous) brond- 
also the undulating fiber, form brood-balls (terminally). Its 
gelatine forms a cement of the loose sandy clay, and a home or abode for the 
iae (or bright-green foliolate lichens) as well as for grasses, etc. 
