CARNOY’S OELL RESEARCHES. 495 
kingdom and in the vegetal kingdom. The discovery that cell- 
plates are of common occurrence in so important a group of 
animals as the Arthropods, throws down the last barrier that 
was supposed to separate the cytodieresis of animals from the 
cytodieresis of plants. 
EXPLANATION OF PLATE XXVI, 
Illustrating Mr. Arthur Bolles Lee’s Report on “ Carnoy’s 
Cell Researches.” 
Fic. 1.—Epithelium cell, from the intestine of a maggot. me. Cell 
membrane. pe. Cell protoplasm or cytoplasm, showing a reticulum enclosing 
a granular “enchylema.” pz. Nucleolar protoplasm or “karyoplasm,” 
showing also a distinct reticulum and granular enchylema. mz. Nuclear 
membrane. Jz. Nuclein cord or gut, contracted into a tight clew in the 
centre of the nucleus. A 
Fic. 2,—Nucleus from a trachea of a maggot. Teased preparation. The 
chromatic cord is here moniliform and transversely striated. The nucleus has 
been stretched by the needle and shows the karyoplasmic reticulum (achromatic) 
drawn out into a sort of spindle. 
Fie. 3.—Fat-cell of Acridium lineola. It shows a cytoplasmic cell- 
plate delaminated into two reflected layers at 4. The triangular spaces in front 
of 4 and ¢ are filled with protoplasm which will be absorbed. 
Fic. 4.—Fat-cell of Morimus lugubris. ye. Cytoplasmic cell-plate, 
entirely traversing the cell. 2. Nuclei. e. Vacuoles with enclosed urates. 
Fic. 5.—Fat-cells of an undetermined larva of Libellula. c. Necks 
uniting three cells, of which the two lower are dividing. m. Membranes 
produced by the cell-plates of the previous division. In the central cell, and 
at z in the lower cell, a cell-plate fully formed. In the lower cell, numerous 
cell-plates in formation. 
Fic. 6.—This, and the four following, are mother-eells from the testis of 
Bacillus linearis. They illustrate the diagonal fission of the elements of 
the mother-star, or “ couronne équatoriale.” 
Fig. 6. The segments are straight and solid. 
Fig. 7. The nuclein has deserted the axis of the segments, which are now 
vertically-compressed annuli, having their centres filled with hyaloplasma, 
