1882.] 



MICKOSCOPICAL JOURNAL. 



133 



dom, with illustrative plates to be 

 issued in parts. To accompany the 

 plates will be carefully prepared ex- 

 planations, and a bibliography. The 

 bibliography of the Crustacea, by 

 Walter Faxon, covers 53 pages in 

 the Bulletin number 6. 



Numbers 7 and 8 are in one vol- 

 ume, the first treating of " Explora- 

 tions of the Surface-fanna of the 

 Gulf Stream," by A. Agassiz, the 

 second " On the Acalephse of the East 

 Coast of New England," by J. W. 

 Fewkes. Both contributions are ac- 

 companied by plates of great value. 



Plant-cells in Animals. — Two 

 short notices in the American Jour- 

 nal of Scieftce, of April, one relative 

 to the " yellow cells " of radiolarians 

 and coelenterates, the other on the 

 commensal life of animals and algas, 

 are worthy of attention. The so- 

 called yellow cells occur in most 

 radiolarians ; they have a well-defin- 

 ed nucleus and multiply rapidly by 

 division. Similar cells have also 

 been found in other animals, as ane- 

 mones, jelly-fishes and others. Citn- 

 kowski, followed by later observers, 

 regarded the yellow cells as parasitic 

 algae, and it was observed that those 

 animals which contained the yellow 

 cells, gave out oxygen in sunlight. 

 Mr. Patrick Geddes believes that 

 the cells are chlorophyllous algcC- 

 cells, and that when they die they 

 afford material for digestion by the 

 animal, but living they remove car- 

 bonic acid and waste products, and 

 supply oxygen to the surrounding 

 animal protoplasm, " foreign chloro- 

 phyll thus performing the respiratory 

 function of hsemoglobin." Four 

 species of this commensal alga are 

 distinguished by Mr. Geddes, who 

 has adopted for it the generic name 

 Philozoon. 



In the same place we find a notice 

 of some observations by K. Brandt, 

 on the " Commensal-life of Animals 

 and Plants," the results of his inves- 

 tigations on the colored bodies in 



Hydra, Spongilla, a fresh-water Pla- 

 naria, and' several infusoria. Under 

 considerable magnification, each of 

 the green bodies consists of colorless 

 protoplasm with a nucleus and a 

 bowl-shaped mass of chlorophyll im- 

 bedded in it. These chlorophyll- 

 masses he regards as algae — those 

 occurring in ZTy^r^, he names Zoochlo- 

 rella conductrix, and the species from 

 Spongilla he designates as Z. para- 

 sitica. 



o 



Studies in Microscopical Sci- 

 ence. — Mr. Arthur C. Cole, F. R. M. 

 S., has begun the publication in Lon- 

 don, of a weekly pamphlet entitled 

 "Studies in Microscopical Science," 

 which bids fair to be of great value. 

 The plan is quite a new one, and we 

 can do no better than to quote from 

 the announcement, first stating that 

 the two numbers now at hand fully 

 bear out the Editor's promise, and one 

 of the double-stained sections which 

 we have received is excellent. The 

 announcement reads thus: — 



It is proposed by means of a carefully 

 prepared and typical object for the micro- 

 scope, together with a drawing and de- 

 scriptive essay, to supply Students, Micro- 

 scopists, and Members of the Medical 

 Profession, with a ready means for study- 

 ing. 1. Microscopical Biology. 2. The 

 Physiological and Pathological Histology 

 of the Bodv. 3. The essentially modern 

 sciences of Microscopical Paleontology, 

 Mineralogy and Petrology. Subscribers 

 will be entitled to the following considera- 

 tions : Each subscriber will receive every 

 week during the term of his subscription, 

 1. A microscopical preparation of the 

 highest class and most perfect finish. 2. 

 A 'printed description of the preparation, 

 in which will be noted : a, the literature 

 concerning it; b, the habitat, etc. ; c, the 

 methods employed in its preparation as a 

 means of study; d, its principal features, 

 and any necessary additional remarks. 

 o. A lithograped or engraved drawing, or 

 diagram of the preparation. The prepa- 

 rations during the first year will consist of 

 a series of 26 Histological, 18 Botanical 

 and 8 Petrological sections, issued alter- 

 nately. 



