176 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
Nerve-Endings in Striped Muscle.* * * § — MM. G. Weiss and A. Dutil 
maintain tliat the neuromuscular or muscle spindles have nothing what- 
ever to do with the motor plates. They are nerve-endings of a sensory 
nature, comparable to the tendino-muscular nerve-terminations of Golgi. 
This is borne out by their development and minute structure. 
Platner’s Intercellular Body.f — Mr. A. Bolles Lee finds that in the 
spermatogonia and spermatocytes of the snail, the karyokinetic spindle 
generally persists during regression in the form of a little body (Platner’s 
j3roblematic body) between the two cells. These bodies last for more 
than one cell generation, and if the cells go on dividing at a certain 
angle, the residual bodies form a chain of bridges between cells. These 
chains form the “ Zellkoppell ” or intercellular ligament of Zimmer- 
mann. Of course the author allows that other modes of regression 
occur, but the above is probably more frequent than is supposed. 
Paranuclear Corpuscle and Centrosome.J — Dr. L. Bremer finds in 
Dr. A. Dehler’s observations on the red blood-corpuscles of the embryo 
chick, direct proof of his supposition that the paranuclear corpuscle and 
the centrosome are identical. This being so, he withdraws the term 
paranuclear corpuscle, but points out the interest of the established 
identity. 
Form, Structure, and Division of the Nucleus.§ — Dr. O. van der 
Stricht describes in detail the peculiar lobed and mamillated appearance 
frequently seen in nuclei of the epidermal cells of larval Salamanders, 
and discusses the significance of these appearances and their occurrence 
elsewhere. Special attention is paid to the relation between the lobes 
of the nucleus and the nuclear threads from which the nucleus is recon- 
structed after mitosis. The paper also includes some account of the 
polymorphism of the nuclei of the spermatogonia of the Salamander. 
Grouping of Pigment-Granules during Segmentation in the Frog.|| 
M. Cli. van Bambeke has studied this subject in its relation to theories 
of the mechanism of cell-division. He finds that during the formation 
of the first furrow in the egg of the frog, there is an arrangement of 
pigment-granules resulting in the production of a pigmental ring sur- 
rounding each of the two nuclei, but in each case separated from the 
nucleus by a clear zone. The nuclei appear to possess the power of 
attracting the pigment-granules, and the author is inclined to suppose 
that the fibrils of the asters are important factors in this attraction. He 
compares their action to that of the filaments of the epithelial cells of 
the retina upon the retinal pigment, and to that of the pseudopodia of 
rhizopods on foreign particles. 
Absorptive Paths in an Epithelial Cell.H — Dr. N. Czermak justly 
remarks that the mode by which food is absorbed is far from being 
clearly understood. In plants it is all diffusion ; in animals the phago- 
* Comptes Kendus, cxxi. (1895) pp. G13-5. 
f La Cellule, xi. (1895) pp. 29-51 (1 pi.). 
I Arch. f. Mikr. Anat., xlvi. (1895) pp. G18-20. 
§ Arch. Biol., xiv. (1896) pp. 243-GO (1 pi.). See also Bull. Acad. Belgique, 
xxix. pp. 38-58. 
|| Bull. Acad. Belgique, xxxi. (1896) pp. 29-46 (4 figs.). 
«[[ Anat. Anzeig., xi. (1896) pp. 547-50 (1 fig.). 
