OSSEOUS FISHES. 545 



flat disk, which covers its head, as represented in Fig. 369, which is 



Fig. 368. The Lump-fish (Cyclopteus). 



formed of a number of transverse and movable cartilaginous plates. 

 Aided by this organ, it attaches itself firmly to rocks, and even to 



Fig. 369. Echineis remora. 



ships and larger fishes, such as the Dog-fish (Acanfhius) , which it 



2 N 



