No. 2, September, 19211 CYTOLOGY 105 



is found wliich breaks up into n in place of 2u number of elements. The 2nd synaptic contrac- 

 tion takes place in the typical fashion. — C. 11. Farr. 



6S5. Cutler, D. W. The cytological problems arising from the study of artificial partheno- 

 genesis. Sci. Prog. [London] 15: 435^144. 1921. 



CSC). Danc;eard, P. A. Vacuome, plastidome et spherome dans I'Asparagus verticillatus. 

 [The vacuomes, plastidomes, and spheromes of Asparagus verticillatus.] Compt. Rend. Acad. 

 Sci, Paris 171 : (19-74. Fig. 1-16. 1920. — The vacuome is shown to be a permanent portion of 

 the cell, sometimes appearing as metachromatin and sometimes as vacuoles. Anthocyan 

 is formed in the vacuoles and not in the plastids. Likewise, the plastidome may be in the 

 form either of mitoplasts or plastids. The spherome is composed of microsomes. — C. H. Farr. 



687. Embeuger, L. £tude cytologique des organes sexuels des Fougeres. [A cytological 

 study of the sex organs of ferns.] Compt. Rend. Acad. Sci. Paris 171: 735-737. 1920. — The 

 paper reports on a mitochondrial study of the prothallia of ferns. During the formation of 

 the sperm mother-cells the chloroplasts become transformed into chondrioconts. In the 

 sperm itself the mitochondria are all granular. A similar transformation occurs in the egg. 

 The fertilized egg has the same chondriosomal appearance as the apical cell of the stem. — 

 C. H. Farr. 



688. GuiLLiERMOND, A. A propos de la constitution morphologique du cytoplasme. [Con- 

 cerning the morphological constitution of the cytoplasm.] Compt. Rend. Acad. Sci. Paris 

 172: 121-124. Fig. 1-8. 1921. — A resume is presented of the study of mitochondria in animals, 

 fungi, and green plants. The author reiterates his former contention that there are 2 kinds 

 of mitochondria in green plants, one of which is concerned with photosynthesis. In addition 

 to these there are in the cytoplasm the fatty granules and the vacuoles. — C. H. and W. K. 

 Farr. 



689. GuiLLiERMOND, A. Observation vitale des chrondriome des champignons. [Obser- 

 vations of the chondriome in living fungi.] Compt. Rend. Soc. Biol. Paris 83: 404-408. Fig. 

 1-11. 1920. — In young growing unstained mycelia of Endomyces Magnusii careful observa- 

 tion shows nuclei, minute fat drops, vacuoles, and elongated thread-like chondriomes. Stain- 

 ing intra vitam with Dahlia Violet in very dilute solution shows that these chondriomes have 

 a granular structure. In the older filaments the small vacuoles enlarge and fuse into larger 

 Vacuoles without modification of the chondriomes, which have no connection with them. 

 Fixation with Fleming's solution, with acetic acid omitted, and staining with Fuchsin shows 

 that the chondriomes are unchanged. — E. A. Bessey. 



690. GuiLLiERMOND, A. Sut la coexistence dans la cellule vegetale de deux varietes dis- 

 tinctes de mitochondries. [The existence of two sorts of mitochondria in plant cells.] Compt. 

 Rend. Soc. Biol. Paris 83: 408-411. Fig. 1. 1920. — In the meristem of root tips of peas chon- 

 driomes are present as filaments, short rods, or granules, that are all alike in staining and other 

 characters. In the plerome and periblem there are bodies that stain less heavily, and which 

 remain of chondriome nature, and bodies that stain heavily and elaborate starch grains. 

 In the sporangia and other parts of the fern the chloroplasts also are similar to these heavily 

 Btaining chondriomes and many lose their chlorophyll and become smaller and reduced to 

 typical chondriomes. The author considers that plastids are usually (but not always) en- 

 larged forms of these more heavily staining chondriomes. — E. A. Bessey. 



691. GuiLLiERMOND, A, Sur la metachromatine des champignons. [The metachromatin 

 of fungi.] Compt. Rend. Soc. Biol. Paris 83: 259-203. 1 pi. 1920. — In the vacuoles of various 

 fungi, intra vitam staining reveals small granules of metachromatin, which may increase in 

 Bize under the influence of certain stains (e.g., neutral red). Sometimes these appear without 

 Btaining as more refringent bodies in the vacuole. Evidently the metachromatin is mostly 

 in solution but is precipitated out by the action of certain stains, changes in acidity, etc. — 

 E. A. Bessey. 



