Mermen were not so often spoken of, but there are some allusions to them.
"Well, I'll tell you how he came," said Sprawley, and all the mermen stopped to listen.
He had heard all about mermen and mermaids, but merboys were something new.
I always think its people are like mermen, neither one thing nor the other.
And, floating through it, were mermaids and mermen of an extreme beauty.
He had seen the exploits of the mermen hunters, knew their skill with net and spear.
When they jumped from the hatch, they discovered that the mermen had been busy in their turn.
He had been guided to this place, saved by the mermen alone.
One of the mermen worked at the door, using the point of his spear as a lever.
The vans move ponderously on, pushed by mermen and mermaids, and out spring any quantity of live Hercules.