No. 2, Septembek, 1921] CYTOLOGY 107 



sperms are briefly stated. Meyrs was not in agreement with the findings of Kylin (191G) 

 on the same subject, a fact which led Kylin to review his worlc. He investigated the sperms 

 of Fucus Areschougii killed with Altman's mixture, stained with rosanilin, and preserved 

 in potassium acetate solution. This revealed a red colored "plastomere" at the rear of the 

 chromatophore; and in front of it a light red-colored granule, the "blepharoplast," from 

 which spring the 2 cilia. Staining with haemalum shows the blue-staining nucleus, lying 

 opposite the "blepharoplast." The author states that the chromatophore first develops as 

 a leucoplast. — A^. L. Gardner. 



697. LiTARDifeRE, R. DE. Le dimorphisme des elements chromosomiques chez le Poly- 

 podituu Schneideri pendant les periodes de telophase et d' interphase. [The dimorphism of 

 the chromosomes of Polypodium Schneideri during the periods of telophase and interkinesis.] 

 Compt. Rend. Acad. Sci. Paris 172: C07-G0S. 1921. — Polypodium Schneideri is a hybrid 

 between P. aures and P. vulgare var. cornuhiense. Two sets of chromosomes appear in the 

 telophase and persist during interkinesis, but during the prophase the heteromorphic nature 

 of the chromosomes disappears and in the metaphase very little difference can be seen between 

 them. — C. H. Farr. 



698. Mangenot, G. Sur le chondriome et les plastes dans I'antheridie des Fucacees. 

 [The chondriome and plastids in the antherids of Fucaceae.] Compt. Rend. Soc. Biol. Paris 

 83: 275-276. Fig. 1-5. 1920. — The plastids in the cells destined to become the antherids 

 divide by simple fission until they are numerous. At the same time the nuclei are dividing. 

 The plastids become paler, more elongated, and finally reach the state of true, almost colorless 

 chondrioconts that later become red-orange in color and fusiform in shape and lie appressed, 

 1 to each nucleus, forming the red point of the future antherozoid. The granular mitochon- 

 dria remain unchanged during this plastid change, grouping themselves in groups of 5-8 

 in the vicinity of each nucleus. — E. A. Besseij. 



699. Mangenot, G., et L. Emberger. Sur les mitochondries dans les cellules animales 

 et vegetales. [Mitochondria in animal and plant cells.] Compt. Rend. Soc. Biol. Paris 83: 

 41S-i20. Fig. 1-6. 1920.— The cells of the liver and kidney of the frog and of the root of a 

 fern {Anthyrium) fixed and stained by Regaud's method show similar mitochondria, — 

 rods, filaments, and granules. The authors believe these structures are homologous. They 

 differ from the vacuole-producing bodies of similar appearance in that they do not stain in- 

 travitally. The chondriome and vacuome systems are distinct. — E. A. Bessey. 



700. MoBius, M. tjber die Grosse der Chloroplasten. [On the size of chloroplasts.] 

 Ber. Deutsch. Bot. Ges. 38 : 224^232. 1920. — The author presents in tabular form his measure- 

 ments of the greatest diameter of the chloroplasts of 215 species, including a nimaber of algae, 

 liverworts, and mosses in addition to 206 vascular plants. Half of the plants in this list have 

 chloroplasts 5 m in diameter and 75 per cent of them have chloroplasts between 4 and 6 /x in 

 diameter. There is little evidence of any relation between size and systematic position. 

 The range within the Nymphaeaceae (Victoria regia 7-10 m and N elumbiiim speciosum 4^5 

 m) is almost as great as the range (3-10 m) in all plants examined. No relation exists between 

 the size of cells, size of leaves, texture of leaves, or habitat of the plant and the size of the 

 chloroplasts. Excluding succulent water plants the herbaceous plants generally have larger 

 chloroplasts than woody ones, possibly because of the relatively smaller water content of the 

 leaf cells of woody plants. The relatively constant size of the nucleus throughout the plant 

 kingdom is that which is most favorable for the molecular adsorption force by which, accord- 

 ing to Willstatter, the chlorophyll pigment is held on the framework of the chlorophyll 

 grain. This constancy of size of the chloroplast he contrasts with the wide range in size of 

 mature parenchyma cells (.01-.09 mm.) and of nuclei (in monocotyledons 2.5-17 n). — R. M. 

 Holman. 



701. Seifriz, William. Observations on some physical properties of protoplasm by aid 

 of microdissection. Ann. Bot. 35: 269-296. 1 fig. 1921. — A discussion is presented of the 



