152 MICROBES, FERMENTS, AND MOULDS. 
own researches soon induced him to adopt the 
same view. 
_ The pebrine microbe was long regarded as a true 
bacterium, successively described as Bacteriwm bom- 
bycis, Nosema bombycis (Fig. 72), and 
i co 0 Panistophyton ovale. Balbiani’s recent 
29°70 o researches tend to show that it should 
1” oe be assigned to another group, much 
0 nearer to animals, and designated 
Fig. 12, — Nosema Sporozoaria. 
bombycis, pebrine a % 3 
zee ee Sporozoaria.—These protista, still 
regarded as plants by many naturalists, 
chiefly differ from bacteria by their mode of growth’ 
and reproduction, in which they resemble the para- 
sitic protozoaria, termed Psorospermia, Coccidies, and 
Gregarinide. 
In Sporozoaria, growth by fission, the rule in all 
bacteria, has not been observed; this distinction is 
fundamental. Sporozoaria multiply by free spore- 
formation in a mass of sarcode substance (protoplasm), 
resulting from the encysting of the primitive corpuscles 
(mother-cells). The formation of numerous spores 
may be observed within the mother-cells, having the 
appearance of pseudonavicelle or spores of gregari- 
nidzand psorospermia (parasites of vertebrate animals). 
Balbiani forms these organisms, which are found in 
many insects, into a small group, which he terms 
Microsporidia. 
The ripe spores are the vibratile corpuscles of 
