Abstract
In the previous paper, the present author has pointed out that the Ca-ion is responsible for the peristaltic action of the egg-tube of the silkworm moth. Intending to clarify whether the substance promoting the peristalsis of the egg-tube in the blood is Ca-ion itself or not, ammonium oxalate was poured into the physiological NaCl solution containing the blood of moth in order to remove Ca-ion therein. As the treated solution scarcely induced the peristaltic action of the egg-tube, it may be probable that the Ca-ion plays an important role in the peristaltic action of the egg-tube in the silkworm moth.
Further investigation was carried out on the microanalysis of Ca and Mg in the blood of moth.
The results are as follows: Ca-ion about 15γ and Mg-ion about 10γ per 0.1ml of the blood in female (non-mated) and male moths (Table 5).
The peristaltic action of the solution prepared by CaCl2 and MgCl2, the cations of which were equal in concentration to the Ca and Mg-ion contents in the blood, is as well as or a little stronger than that of the blood.
From these experiments, noted above, the substance promoting the peristalsis of egg-tube found in the blood may be concluded to be “Ca-ion”.
Significant difference of Ca and Mg-ion or total Ca and Mg contents in the blood between the egg-laying and the non-mated female moths was not recognized. No apparent difference was observed about the promoting action of the peristalsis by the blood between egg-laying and non-mated female moths contrary to FUKUDA'S observation.
