ZOOLOGY AND BOTANY, M1CEOSCOPY, ETC. 597 



more than a cylindrical filament without particular structure. It is a 

 cellular prolongation with an external membrane, a peripheral collagen 

 substance, and an axial filament. 



Origin of Giant Cells.* — V. Babes calls attention to the frequent 

 occurrence of budding in the proliferation of tissues, e.g. in the develop- 

 ment and neoplastic changes of vessels. He finds that many giant cells 

 are simply modifications or arrestments of vascular buds. This is well 

 seen in tuberculous giant cells and in those of myxo-sarcomata. 



Transformation of Epithelium into Connective Tissue.f — E. 

 Retterer has made the experiment of separating the skin from the sub- 

 jacent tissue | (in the metatarsal region of the guinea-pig). The resulting 

 irritation evokes hypertrophy and proliferation in the epidermic cells, 

 which give rise to generations of cells that form reticulated and vascular 

 connective tissue, becoming finally part of the papillary layer of the 

 dermis. 



Intestinal Epithelium in Amphiuma.J — C. Saint-Hilaire describes 

 the unusually large elements of cylindrical epithelium lining the gut of 

 this Amphibian. Most noteworthy is his description of coiled filaments 

 which occur in varied form in the plasma and appear to enter into close 

 union with the nucleus. In each case there seems to be a single thread 

 which starts near the periphery and coils inwards. 



Intracellular Canaliculi in Supra-renal Capsules.§ — C. Ciaccio has 

 used Golgi's method with success in demonstrating endocellular canals 

 in the suprarenal capsules. They are probably of service in conducting 

 the products of secretion to the capillaries, as is probably the case in 

 other glands of internal secretion. 



Cellular Nature of Zoochlorellae.|| — J. Villard finds that the 

 soochlorellse of Hydra viridis, Faranmcium bursaria, and Stentor poly- 

 morphs have a cellular structure with a well-defined nucleus. Apart 

 from the nucleus, the cellular nature of the zoochlorella^ is demonstrated 

 by the presence of " Metachromic corpuscles,' 1 '' as in small unicellular 

 ■algse. 



c. General. 



Deep-Sea Life in Indian Seas.! — A. Alcock gives an exceedingly 

 interesting account of the voyages and exploration-methods of the Royal 

 Indian Marine Survey ship " Investigator," and of the deep-sea fauna 

 of the Indian region. " A Avalk acioss the bed of the ocean from 

 Madras to the Andamans is idealised in a manner calculated to fascinate 

 the reader and arouse the interest in marine research." The author has 

 much to say in regard to adaptation to abyssal haunts, colour resemblance, 

 habits of hermit-crabs, luminous fishes, commensalism, e.g. betAveen the 

 ■Scorpamoid fish Minous i/iermis and a compound Hydroid Stylactis minoi, 



Comptes Kendus, cxxxvi. (1903) pp. 314-6. t Tom. cit., pp. 511-4. 



"^-93(6 figs.). 



... 1283-4. 

 •J ' A Naturalist iu the Indian Seas,' Svo, London, pp. 24 and 318 (98 figs., tables, 

 and a map). See Nature, lxvii. (1903) pp. 320-1 (2 figs.). 



