The vital staining of mitochondria with janus green etc. 



273 



3. Occurrence. 



One of the characteristics of mitochondria is the generality of 

 their occurrence. The structures which I am about to describe in 

 human blood cells present this characteristic. I worked out their 

 distribution with janus green from the point of view of the ontogenesis 

 and the phylogenesis of the blood. 



They occur as follows in the blood and blood forming organs of 

 the guinea pig: 



Bone marrow 

 lymphocytes 

 large lymphocytes 

 amphophylic leucocytes 



Circulating blood 

 lymphocytes 

 large lymphocytes 

 amphophylic leucocytes 



Lymph gland 

 lymphocytes 

 large lymphocytes 

 amphophylic 



leucocytes 

 endothelial cells. 



amphophylic myelocytes 

 megaloblasts 

 normoblasts 

 nonnucleated reds 

 megakaryocytes 

 I find them in the circulating blood of the following vertebrates: 

 f Primates-Man. 

 I Kodentia-Guinea pig. 

 Columbae-Pigeon, lymphocytes, large lymphocytes and 



finely granular leucocytes. 

 Chelonia-Turtle, (Pseudemys hieroglyj)hica), nucleated reds, 

 large and small lymphocytes and finely gra- 

 nular leucocytes. 

 Urodela-Triton, (Diemyctylus viridescens), nucleated reds, 

 large and small lymphocytes and finely gra- 

 nular leucocytes. 

 Anura-Frog (Rana palustris), nucleated reds, large andsmall 

 lymphocytes and finely granular leucocytes. 

 Teleostomi-Gold fish, nucleated reds, large and small 

 lymphocytes and finely granular leucocytes. 

 4. Independence of other formed elements. 



Internationale Monatsschrift f. Anat. u. Phys. XXXI. 18 



Mammalia 



Aves- 



Eeptilia- 



A mphibia 



Pisces 



