524 
THE OCEAN WORLD. 
They are numerous in species — Diorlon pilosus, represented in 
Fig. 357, being typical of the others. 
Fig. 357. Diodon pilosus. 
The Sclerodermes are distinguished by their conical or pyramidal 
muzzle, terminating in a little mouth armed with true teeth ; their 
Fig. 358. The File-fish (Batistes). 
skin is generally stiff and covered with hard scales. The File-fish, 
Batistes and Coffres, are selected for notice. The File-fish (Fig. 358 ) 
