190 SUMMARY OF CURRENT RESEARCHES RELATING TO 



the olfactory epithelium of various types, and a number of other 

 examples of sensory epithelium. He calls attention to the presence of 

 supporting fibrils as distinct from neurofibrils in all the kinds of sensory 

 cells in Vertebrates, and discusses the topographical and physiological 

 relations of the two. 



Continuity of Mitochondria through many Generations of Cells.* 

 M. E. Faure-Fremiet finds evidence in Infusorians and in germ-cells 

 that specific mitochondria are divided at each generation of cells, and a con- 

 tinuity thus sustained. Meves has shown for the fowl, and Duesberg for 

 the bee and the rabbit, that the mitochondria of the ovum are seen in the 

 embryo. The author inquires in a critical spirit into the significance of 

 this, whether the mitochondria are vehicles of inheritance, or whether 

 they have a trophic value ; and many other theories are discussed. 



Reticular Apparatus in Cells of Corpus Luteum.f — Joseph Karl 

 Riquier has studied this in the cow. He finds that Golgi's reticular 

 apparatus, though varied in appearance, is usually evident in a peri- 

 nuclear position. The continuity of the clumps and threads of the 

 network is often far from evident. Three stages in the involution of 

 the network are described, ending in practically complete disappearance. 



Pigment-cells in Sheep's Cornea.^ — P- A. Cilimbaris has found in 

 the substantia propria of the cornea, under the anterior epithelium, 

 beside the ramifications of the plexus subepithelial and basalis, numerous 

 pigment-cells. They occurred not merely near the corneal margin, but 

 over the whole surface. 



Pigment in the Human Neurohypophysis^ — A. Kohn discusses the 

 posterior lobe or nervous portion of the hypophysis (the neurohypophysis), 

 as contrasted with the anterior lobe (the epithelial or glandular portion). 

 What particularly interests him is the pigmentation, which has its seat in 

 the glia-cells and their processes, especially in the latter. The pigment 

 is not fat nor a lipochrome, but its precise nature has not been ascertained. 

 It is probably a disintegration-product. It increases with age. The 

 author gives many reasons why he cannot agree with those who call the 

 neurohypophysis a gland. 



Kidney of Gecko. || — B. Zarnik has studied the structure of the 

 multilobate kidney in Ascalobota, and compares it with that of other 

 Eeptiles and of Mammals. That of other Reptiles may be derived from 

 the Gecko type, which also shows most resemblance to that of Mammals. 

 It is pointed out that in Geckos the differentiation into cortex and 

 medulla has begun. The author suggests that a lobe of the Gecko 

 kidney is homologous with those parts of the cortex in Mammals that 

 are enclosed by the medullary rays. 



* Anat. Anzeig., xxxvi. (1910) pp. 186-91 (3 figs.). 



t Arch. Mikr. Anat., lxxv. (1910) pp. 772-80 (1 pi.). 



X Tom. cit., pp. 689-91. § Tom. cit., pp. 337-74 (2 pis.). 



|| SB. Phys. Med. Ges. Wiirzburg (1910) pp. 2-4. 



