126 Marshall Ward . — On the Characters , 
(3) No sheaths, equal in diameter throughout. No rod-like 
gonidia. 
Phragmidoihrix. Fixed. Reproduced by numer- 
ous cell-divisions in two planes, longitudinal 
and transverse. 
Beggiatoa. Free. Divisions transverse only. 
[Appendix Agonium. J 
II. Baculogenae. 
Presenting three stages, as before, filaments, rodlets, and cocci ; but 
here the rodlet is the typical individual, and gives rise to the filaments 
and cocci. Filaments transitory, free, not sheathed, and with no dis- 
tinction into base and apex : merely due to the prolongation of rodlets 
as yet imperfectly segmented. 
A. Rodlets and cocci nude — i.e. with no special investment or 
‘ capsule ’ (Bacilleae). 
(a) Endosporous. 
(i) Rodlets dividing by repeated longitudinal divisions 
(Pasteurieae). 
Pasteuria. Rodlets inaequipolar. Spores. 
(ii) Rodlets dividing by repeated transverse divisions. 
* Rodlets connected into a network (Thiodicty eae) . 
Thiodictyon . Rodlets aequipolar. 
* * No reticulated coenobium. 
+ Rodlets straight or curved, but never spirally 
twisted (Eubacilleae). 
§ Spores not larger than the major transverse 
diameter of their mother-cells. 
IP Spores developed in normal and un- 
altered rodlets. 
1. Contents of rodlets homogeneously 
diffused. 
Mantegazzaea. Rodlets fusiform. 
Bacillus. Rodlets cylindrical. 
2 . Contents bipolar. 
Pasteurella. 
IP TP Spores developed in specially swollen 
ellipsoidal or fusiform rodlets. 
Clostridium . Contents uniform. 
