CLASSIFICATION BY GROUPS. 107 
Microspira glutinosa. 
Microspira delgadensis. 
Microspira tuberosa. 
Microspira degenerans. 
Microspira luminosa. 
Microspira caraibica. 
Microspira papillaris. 
Ill, CLASSIFICATION OF BACTERIA BY GROUPS. 
Systematic bacteriology is at present in a state 
of chaos. Many times the most that can be done 
in attempting to classify a new species, is to refer 
it to some group, the members of which have 
certain characters in common, and are probably 
the descendants of one ancestral type. Chester has 
proposed’ a synopsis of several groups of bacteria 
which, slightly modified, is given below. 
BACTERIUM. 
I. Spore-formers. 
1. No growth at room-temperature or below 
22°-25° C. 
TTHERMOPHILIC GROUP. 
Bact. termophilum type. 
2. Grow at room-temperature. 
A. Do not liquefy gelatin. 
BACT. FAICALIS GROUP. 
Bact. subtile type. 
B. Liquefy gelatin. 
1 Eleventh Annual Report of the Delaware College Agri- 
cultural Experiment Station for 1898-99. 
