JOURNAL OF MICROSCOPICAL SCIENCE. 



DESCRIPTION OF PLATE VI, 



Illustrating Mr. J. T. Cunningham^s " Review of Recent 

 Researches on Karyokiuesis and Cell Division." 



Figs. 1 — 15. — Successive stages in the indirect (Karyokinetic) division of 

 an animal cell (after Flemming). Each phase is supposed to have 

 been fixed and stained. 



Fig. 1. Restiug nucleus, ground substance stained, nucleoli shown as 

 thickened spots of the reticulum. Fig. 2. Convolution; in this, and all 

 the figures up to 14th, only the fibrillar part of the nucleus is stained. 

 Fig. 3. Wreath or garland. Fig. 4. Fibrils breaking up into " loops ;" 

 commencement of the mother star. Fig. 5. Mother star, diastole, 

 fibres splitting longitudinally. Fig. 6. Systole of the star. Fig. 7. 

 Return to diastole, the splitting complete. Fig. 8. Equatorial plate. 

 Fig. 9. Basket form of the daughter nuclei ; indications of the 

 achromatic spindle and of the cell plate shown. Fig. 10. Dyaster. 

 Fig. 11. Wreath form of the daughter nuclei. In the following 

 figures the daughter nuclei pass into the resting state. In Fig. 15 the 

 ground substance is again stainable. 



Figs. 16, 17, 18, and 19. — From figures given by Flemming from prepara- 

 tions of egg of Toxopneustes lividus, presented to him by H. Fol. 



Figs. 20— 26.— After Arnold (' Virchow's Archiv,' Bd. 78, 1879). 



Figs. 20 and 21. From epithelioma of lower lip. Figs. 22 — 26. 

 From carcinoma of mammary gland. 



Figs. 27 — 31. — Cartilage cells of larval Batrachia (After Schleicher, 



'Arcliiv Mik. Anat.,' Bd. 16). 

 Figs. 32 and 33.— From Eberth, ' Virchow's Archiv,' Bd. 67. 



Fig. 32. Endothelium cell, from Descemet's membrane in frog. 

 Fig. 33. Epidermis cell of rabbit, sjiowing a " cell plate." 

 Figs. 34 — 38. — Diagrams illustrating the process of division of the equa- 

 torial plate, according to Flemming. 



Fig. 34. Diastole. Fig. 35. Systole of the mother star. 

 Figs. 39 and 40. — From Dr. Walstein's preparations. 

 Fig. 39. Triradiate arrangement of chromatin. 

 Figs. 41, 42, and 43. — Diagrams of the structure of karyokinetic figures 

 in the cells of Salamandra, from Flemming's ' Beitrage,' iii Theil 

 C Arch. f. Mik. Anat.,' Bd. xx). 



Fig. 41. Mother star. Fig. 42. Equatorial plate. Fig. 43. Daughter 

 stars. 



Fig. 44. First division of the segmentation nucleus in the fertilised ovum of 

 Sphcerechinus brevispimsus. Compressed star form of the chromatic 

 figure (from Flemming's ' Beitrage,' Theil iii). 

 Figs. 45 and 46. — Multiple division of the nucleus in cells of carcinoma. 

 Fig. 45 shows division into four, Fig. 46 into seven daughter nuclei. 

 Fig. 46 shows spindle (convolution) and nuclear plate coexisting in 

 the same stage (from W, A. Martin's paper in • Virchow's Arch./ 

 Bd. 86). 



