common cachalot

— However that may be, so much is certain, that when Sibbald considered this Cetacean which had only teeth in the lower jaw, and whose very great head contained a large quantity of spermaceti, to be a species different from the common cachalots, as well as from the one stranded in the Firth of Forth, he did so because there was a dorsal fin present, and by no means on account of its supposed great height.