ON THE BLOOD-PLATES OF THE HUMAN BLOOD, 



WITH NOTES ON THE ERYTHROCYTES 



OF AMPHIUMA AND NECTURUS. 



GUSTAV EISEN, Ph.D. 



CONTENTS. 



A. The Bi.ood-Plates of the Human Blood. ^^^^ 



I. Introductory 635 



II. Methods of Investigation 636 



III. Historical Notes on the Nature of the Blood-Plates 637 



IV. Blood-Plates, Plasmocytes, and Fusiform Corpuscles 641 



V. Life-History of a Plasmocyte 642 



VI. True and False Blood-Plates 644 



VII. General Description of the Blood-Plates 646 



VIII. Detailed Description of the Blood-Plates 647 



IX. Blood-Plates and Plasmocytes 649 



X. Functions of the Blood-Plates or Plasmocytes 650 



B. The Blood-Corpuscles of Amphiuma and Necturus. 



XI. General Remarks on the Erythrocytes 652 



XII. Two Kinds of Erythrocytes and Two Kinds of Fusiform Corpuscles 652 



XIII. Structure of the Oblong Erythrocytes 653 



XIV. Function of the Globules 655 



XV. Summary 656 



Bibliography 659 



Explanation of the Figures 661 



Stains 666 



A. THE BLOOD-PLATES OF THE HUMAN BLOOD. 



L Introductory. 



In a paper on the plasmocytes of Batrachoseps, I stated that 

 I had also found plasmocytes in the human blood. At the 

 time of publication of that paper, I had not yet had oppor- 

 tunity to study these structures in the human blood, and could 

 only affirm their presence and suggest that they probably had 



