PLASMOCYTES; 1 



The Survival of the Centrosomes and Archoplasm of the Nucle- 

 ated Erythrocytes, as Free and Independent Elements in 

 the Blood of Batrachoseps attenuatus Esch. 



BY GUSTAV EISEN, Ph. D., 

 Curator in tlu California Academy of Sciences. 



CONTENTS. 



Page. 

 Plates I and II. 



I. Introductory 4 



II. Methods of Investigation 5 



General Remarks 5 



III. Staining 6 



Toluidine 7 



Eosin-metkyl blue "0 " 7 



Iron-hcematoxylin 7 



Ehrlich-Biondi and other stains 8 



IV. The Blood Elements 8 



General Remarks 8 



Non-nucleated Erythrocytes 9 



Nucleated Erythrocytes 9 



The Fusiform Corpuscles 10 



Leucocytes with Polymorphous Nucleus 10 



Smaller Mononucleary Leucocytes 12 



Leucocytes with Eosinophile Granulation 12 



Leucocytes of Various Kinds in Dissolution 12 



Plasmocytes 13 



V. The Fusiform Elements 14 



VI. The Plasmocytoblasts 16 



VII. Cytosome 20 



The Plasmosphere 20 



Hyalosphere 22 



The Granosphere 22 



VIII. Archosome 25 



The Centrosphere 25 



Somosphere and Centrosomes 26 



IX. Different Kinds of Protoplasm 27 



X. Development of the Plasmocytoblast into Plasmocytes. . 28 



XI. The Plasmocytes 29 



General Remarks 29 



1 Presented for publication May 27, 1896. March 31, 1897. 



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