416 GUSTAF FR. GOTHLIN 
6h. 8 m.—6 h. 10m. In the absence of any interference, the 
ciliary motion is exceedingly frequent without driving the animal 
forward. The animal is transferred once more to the aquarium. 
7h.13m. The ciliary action is still abnormally frequent, but 
drives the animal forward in the aquarium. ‘Transference to the 
cuvette, in which has previously been poured water from the 
aquarium in which the animal is kept; lowering of electrodes into 
the cuvette. 
7h. 18 m7 h. 30m. The animal seems still to be under the 
influence of the atropine. At any rate there is still no primary 
inhibition of the ciliary motion on closure of a longitudinal oro- 
central current, but only secondary inhibition as a result of the 
contraction of the body and the accompanying retraction of the 
rows. ‘The latter effect is fully developed even with a current of 
Ii temsamp:/ ems 
7h.45m. The animal is again transferred to the aquarium, 
which has in the meantime been filled with fresh deep-sea water. 
10/7. 12h. 34m. The ciliary activity seems normal to the 
eye. The animal is transferred to a cuvette containing sea- 
water from its own aquarium and immediately swims to the 
bottom. Electrodes are immersed. The effect of a longitudinal 
oro-central current is tested. 
12 h. 37 m.-12 h. 38 m.' With a current of density 0.76 to 
1.11 m.amp./cm.? there is inhibition of the frequency without 
any drawing in of the rows, but not total stoppage. 
12h. 39 m. With a current of density 1.52 m.amp./cm.? the 
observed row stops completely. Jn another row, however, there 
still seem to be some waves. — 
12h.41 m. Withacurrent of density 1.92 m.amp./cm.? there 
is total primary inhibition in six rows, diminution of the fre- 
quency in two. 
8. A Beroé, 22 mm. long, caught the day before. It was 
observed on several occasions that the ciliary movements of 
this animal showed ‘spontaneous’ stoppages of a few seconds’ 
duration. 
4h.15m. The animal is transferred from the aquarium to a 
cuvette in which has been previously poured sea-water from the 
same aquarium. Temperature in the cuvette 17.5°C. 
