37o 
Takeda . — On Carteria Fritschii , sp. nov. 
The four flagella which are attached to the very small colourless beak 
at the anterior end of the protoplast as a rule slightly exceed the length of 
the cell. So far as has been ascertained, the flagella emerge through the 
cell-wall in four different directions, practically equidistant from one 
another. 
There is a single urceolate chloroplast which is granular and occupies 
practically the whole of the protoplast. Enclosed within the central 
hollow of the chloroplast there is a mass of colourless protoplasm, at the 
bottom of which, and slightly nearer the anterior end than the centre of 
the cell, a small nucleus is lodged. It appears that from this central mass 
Carteria Fritschii, Tak., sp. nov . x 1,000. Figs. 1-7. Zoogonidia. Fig. 8. Mother-cell with 
two daughter-cells inside. Note the daughter-cells are provided with flagella. Fig. 9. Mother-cell 
with three daughter-cells. Fig. 10. Ditto, an end-view. 
of protoplasm a number of processes radiate towards the periphery of the 
cell, penetrating through the chloroplast and finally reaching the thin peri- 
pheral layer of protoplasm. These protoplasmatic rays are frequently quite 
conspicuous, particularly at the point where they join with the peripheral layer 
of protoplasm (cf. Figs. 2, 5). A pyrenoid, which is usually globular or 
sometimes more or less angular, and as a rule quite conspicuous, is present 
near the posterior end of the chloroplast. It is situated usually in the axis 
of the cell, or it is occasionally excentric (Figs. 6 , 7). There is a small yet 
conspicuous stigma (pigment-spot), oval in shape and somewhat anterior in 
position (Figs. 2, 3, 7, 8). Two contractile vacuoles, which pulsate alter- 
nately, can be seen just below the protoplasmatic beak (Fig. 3). 
Two to four daughter-cells are produced as the result of one or two 
successive longitudinal divisions of the protoplast (Figs. 8-10). At 
maturity each daughter-cell becomes provided with four flagella whilst 
