22 ANNIE PORTER 



new class of the Protozoa, the Spirochaetacea for the réception 

 of the Spirochaetes. 



Finally, it should be noted most carefully tliat little is to 

 be gained by the mère making of new speeies, or the underta- 

 king of long disputations on relatively small, controversial 

 points. The need is really for more facts about ah-eady well- 

 recognised speeies of Spirochaetes, in order to estabhsh fully 

 their complète life cycles. The attainment of this désirable end 

 will probably be difificult, and mère controversy and élaboration 

 of théories will not aid in its achievement. 



IX. — Summary. 



F Observations of living Spirochaeta balbianii and S. ano- 

 dontae made by the aid of the water immersion lens and ultra- 

 microscopic substage enable one to see many features that up 

 to the présent hâve rarely been recorded in otlier than stained 

 préparations. 



20 The membrane -with its chromatic border,of both thèse 

 Spirochaetes is easily and clearly seen in the living orga- 

 nisms. 



3° The myonemes both of the body and* membrane can be 

 observed in living Spirochaetes and the waves of contraction 

 that pass down them are manifested as a séries of pulsations 

 or swellings. 



40 No évidence of any flagellar structures has been gained 

 from observations of living S. balbianii and 8. anodontae. 



50 The nuclear apparatus appears in the living organism as 

 a séries of bars or dots distributed throughout the length of 

 the body. 



QP Basai granules hâve been seen in living Spirochaetes 

 {S. balbianii and S. anodontae). 



7° Many peculiar movements of thèse Spirochaetes are dis- 

 cussed in Section IV of this paper. Among thèse are U forms 



