It's an actual boat indeed. It transports the animal that secretes it without the animal sticking to it.

"The argonaut is free to leave its shell," I told Conseil, "but it never does."

"Not unlike Captain Nemo," Conseil replied sagely. "Which is why he should have christened his ship the Argonaut."

For about an hour the Nautilus cruised in the midst of this school of mollusks. Then, lord knows why, they were gripped with a sudden fear. As if at a signal, every sail was abruptly lowered; arms folded, bodies contracted, shells turned over by changing their center of gravity, and the whole flotilla disappeared under the waves. It was instantaneous, and no squadron of ships ever maneuvered with greater togetherness.

Just then night fell suddenly, and the waves barely surged in the breeze, spreading placidly around the Nautilus's side plates.

The next day, January 26, we cut the equator on the 82nd meridian and we reentered the northern hemisphere.

During that day a fearsome school of sharks provided us with an escort. Dreadful animals that teem in these seas and make them extremely dangerous. There were Port Jackson sharks with a brown back, a whitish belly, and eleven rows of teeth, bigeye sharks with necks marked by a large black spot encircled in white and resembling an eye, and Isabella sharks whose rounded snouts were strewn with dark speckles. Often these powerful animals rushed at the lounge window with a violence less than comforting. By this point Ned Land had lost all self-control. He wanted to rise to the surface of the waves and harpoon the monsters, especially certain smooth-hound sharks whose mouths were paved with teeth arranged like a mosaic, and some big five-meter tiger sharks that insisted on personally provoking him. But the Nautilus soon picked up speed and easily left astern the fastest of these man-eaters.

On January 27, at the entrance to the huge Bay of Bengal, we repeatedly encountered a gruesome sight: human corpses floating on the surface of the waves! Carried by the Ganges to the high seas, these were deceased Indian villagers who hadn't been fully devoured by vultures, the only morticians in these parts. But there was no shortage of sharks to assist them with their undertaking chores.

Near seven o'clock in the evening, the Nautilus lay half submerged, navigating in the midst of milky white waves. As far as the eye could see, the ocean seemed lactified. Was it an effect of the moon's rays? No, because the new moon was barely two days old and was still lost below the horizon in the sun's rays. The entire sky, although lit up by stellar radiation, seemed pitch-black in comparison with the whiteness of these waters.

Conseil couldn't believe his eyes, and he questioned me about the causes of this odd phenomenon. Luckily I was in a position to answer him.

"That's called a milk sea," I told him, "a vast expanse of white waves often seen along the coasts of Amboina and in these waterways."

"But," Conseil asked, "could master tell me the cause of this effect, because I presume this water hasn't really changed into milk!"

"No, my boy, and this whiteness that amazes you is merely due to the presence of myriads of tiny creatures called infusoria, a sort of diminutive glowworm that's colorless and gelatinous in appearance, as thick as a strand of hair, and no longer than one-fifth of a millimeter. Some of these tiny creatures stick together over an area of several leagues."

"Several leagues!" Conseil exclaimed.

"Yes, my boy, and don't even try to compute the number of these infusoria. You won't pull it off, because if I'm not mistaken, certain navigators have cruised through milk seas for more than forty miles."

I'm not sure that Conseil heeded my recommendation, because he seemed to be deep in thought, no doubt trying to calculate how many one-fifths of a millimeter are found in forty square miles. As for me, I continued to observe this phenomenon. For several hours the Nautilus's spur sliced through these whitish waves, and I watched it glide noiselessly over this soapy water, as if it were cruising through those foaming eddies that a bay's currents and countercurrents sometimes leave between each other.