Zool. [mod.L., f. Gr. τρῆμα hole, pore + OCTOPUS.] A subgenus of Octopus having two large aquiferous pores on the back of the head.
1851. Woodward, Mollusca, I. 65. Between the branchiæ are two rows of brown or violet spots, like the pigment cells of the tremoctopus.
1878. Bell, Gegenbaur’s Comp. Anat., 327. Sometimes over a few of the arms only (4 in Tremoctopus), or over them all.
