396 Transactions of the Society. 



siderable length (fig. 77). If we adopt the classification of Zopf, it 

 should be placed in the genus Streptoeoccus. In fig. 78 we have 

 represented the mucinous envelope or " capsule " which Fried- 

 lander for a time supposed to be peculiar to his so-called " pneu- 

 monia-coccus," but which is now known to be present under 

 certain circumstances in several different micro-organisms of this 

 class. When we examine with a good objective a drop of blood 

 obtained from an infected rabbit just dead, or a drop of a fluid 

 culture, this mucinous (?) envelope appears as a transparent halo 

 surrounding the cocci ; and in stained preparations it is more or 

 less apparent according to the method of staining employed, and 

 certain circumstances not well determined. I have very rarely 

 seen it developed to the extent shown in fig. 79, which is copied 

 from the photo-micrograph to which Mr. Dowdeswell refers in his 

 paper. The more usual appearance is that seen in fig. 80, which 

 mdeed may be taken as a typical representation of the organism as 

 seen in stained preparations. 



