yownal of Comparative Neurology and Psychology. 



distributed. The nuclear membrane is distinct. One would 

 hardly imagine the nerve cells shown in Fig. 7 was from the same 

 species as that represented in Fig. 6. In the axone there are four 

 large lymph spaces containing densely-staining bodies of irregular 

 shape. There are also nine roundish lymph spaces each contain- 

 ing a rodlike or roundish body as well as many small spaces rather 



evenly distributed. The 

 remaining bodies illus- 

 trate very well Rhode's 

 ('04 a) idea ot chondro- 

 miten and mitochon- 

 drien as well as sphere 

 substance. I am in- 

 clined to doubt very 

 much the value of his 

 distinctions in regard to 

 Fig- 7- the several structures of 



the cytoplasm. In some instances in the figure these irregular 

 masses lie free in the cytoplasm; while in others, the granules of the 

 cytoplasm are arranging themselves to form a wall which will 

 result in a lymph space. Some of the bodies are quite large and 

 regular shaped, while others are equally irregular and very small. 

 The conditions of the cytoplasm and nucleus described above 

 represent several different states. A later paper will attempt to 

 correlate them. 



Syracuse University, Department of Zoology, May lo, 1905. 



LITERATURE. 



Bergen, Frederick von. '04. — Zur Kenntnis gewisser Struktur-bilder (Netzapparate, Saftkanlchen, 

 Tropospongien) im Protoplasma versshiedener zellmarten. Archiv f. mikr. Anat., Vol. 64. 

 Holmgren, Emil. '01. — Anatomische Hefte, Vol. 11. 

 McClure, C. F. W. '97. — The finer Structure of the Nerve Cells of Invertebrates. Gastropoda. 



Zool. Jahrh., Aht. Morph., Bd. 11. 

 Rhode, E. '96. — Ganglion Zellkern und Neuroglia. Archiv f. mikr. Anat., Vol. 47. 

 '98. — Die Ganglion Zelle. Zeit. f. w. Zool., Vol. 64. 



'03 a. — Untersuchungen iiber den Bau der Zelle. I Kern und Kernkurper. Ibid., Vol. 73. 

 '03 b. — II. — Ueber eigenarte aus der Zelle wandernde "Spharen'' und "Centrosomen," ihre 



entstehung und ihren Zerfall. Ibid., Vol. 75. 

 '04 a. — III. Die entstehung von Mitochondrien und Chondromiten aus eigenartigen intra- und 



extra-zellularen Spharen (Idiozome). Ibid., Vol. 76. 

 '04 b. — rV. Zum histologischen wert der Zelle. Ibid., Vol. 78. 

 Schneider. '02. — Vergleichende Histologie der Tiere. 



