Е. Holmgren. Note d. Spinal ganglion cells. (With. 11 images.). Anat. Vol. 16, № 7, p. 161-171. 1899. Idem. Further communications about d. Structure of the nerve cells. (With. 13 images.). Ibidem. Vol. 16. N 15/162 р. 388-397. 1899. F. Studnicka. About the occurrence of v. Canals u. Alveoli in the body d. Ganglion cells and in the axis cylinder of some nerve fibers, vol. 16. N 15/162 р. d. Vertebrates. Ibid. 397-401. 1899. Alb. Adamkiewicz. To the blood vessel system of the ganglion cell. Ibid. Vol. 17. N 2/3 p. 44. 1900. Е. Holmgren. Still other communications about the construction d. Nerve cells from various animals. (With. 17 image). Ibid. Vol. 17, N 6/7 p. 113 - 129. 1900. Idem. A few words on the occasion of the last communication published by Prof. Adamkiewicz. Ibidem, Vol. 17, N 15. 1900. A. Bethe. Some remarks on the “intracellular tubules” d spinal ganglion cells, etc. — Ibid. Vol. 17. N 16/17 p. 304-309 (with 3 images). 1900

The above articles, although they are b. including the nature of the preliminary reports, they do not doubtlessly prove with what lively interest in the last time various researchers have turned to the development of one question, with the resolution of which a lot should be clarified regarding the finer structure, as well as the biology of the nervous.

The number of fibers and range of fiber diameters in the cochlear nerve of three odontocete species

The total number of fibers and the range of fiber diameters in the cochlear nerve of three species of toothed whales were determined. There are 90 672 fibers in Lipotes vexillifer, 82 570 in Neophocaena phocaenoides, and 77 171 in Sousa chinensis. In Lipotes the fiber diameters range from 0.4 to 25.8 μm, with a modal diameter of 9.5 μm, and the largest fiber measures 35.2 μm; in Neophocaena, the diameter ranges from 0.6 to 36.0 μm, with a mode of 9.5 μm, and the largest fiber measures 54.9 μm; in Sousa the diameter ranges from 0.3 to 39.7 μm, with a mode of 8.5 μm and the largest fiber measures 50.3 μm. In Lipotes, Neophocaena, and Sousa, 1.5, 8.5, and 14.2%, respectively, of the cochlear fibers are ≥ 20 μm in diameter. Almost all the fibers are myelinated, and the ratio of the diameter of the axis cylinder to the outer diameter of the fiber in each species averages between 0.6 and 0.7. The high percentage of large fibers and the very wide range of fiber diameters indicate that the odontocete cochlear nerve is specialized for high-speed communication with the brain. The maximum diameters of the myelinated fibers of the cochlear nerve reported in this paper are the largest diameters recorded for the cranial nerve, or any other nerve, among the vertebrates.