sea-tortoise

This then is the reason why these animals, alone of their kind, have a bladder, the sea-tortoise a large one, the land-tortoises an extremely small one.

On the Parts of Animals 2002

You may have often admired the tortoise-shell of which combs are made, with its beautiful wavy lines and markings; it is taken from the outside of the shell of the turtle or sea-tortoise, which is caught not only for the sake of its shell, but because its flesh is so good to eat.

Twilight and Dawn Simple Talks on the Six Days of Creation Caroline Pridham

A huge sea-tortoise, disturbed, slid off the sand-bank where he had been sunning himself and paddled sulkily away.

Darkness and Dawn George Allan England 1906

Spaniards, who gave name to this island, called it so from the shape of the land, in some manner resembling a great sea-tortoise, called by them

The Pirates of Panama or, The Buccaneers of America; a True Account of the Famous Adventures and Daring Deeds of Sir Henry Morgan and Other Notorious Freebooters of the Spanish Main George Alfred Williams 1903

"Delicious eggs and turtle soup!" he announced when Iris asked him why he was so intently studying certain marks on the sand, caused by the great sea-tortoise during their nocturnal visits to the breeding-ground.

The Wings of the Morning Louis Tracy 1895