Percesoces and Rhegnopteri 437 
ceruleomaculata are common in Samoa. The genus Querimana 
includes dwarf-mullets, two or three inches long, known as 
whirligig-mullets. These little fishes gather in small schools 
and swim round and round on the surface like the whirligig- 
beetles, or Gyrinide, their habits being like those of the young 
mullets; some young mullets having been, in fact, described 
as species of Querimana. The genus Agonostomus includes fresh- 
water mullets of the mountain rivers of the East and West Indies 
and Mexico, locally known as trucha, or trout. Agonostomus 
nasutus of Mexico is the best-known species. 
The Joturo, or Bobo, Joturus pichardi, is a very large robust 
and vigorous mullet which abounds at the foot of waterfalls 
Fic. 344.—Joturo or Bobo, Joturus pichardi Poey. Rio Bayano, Panama. 
in the mountain torrents of Cuba, eastern Mexico, and Central 
America. It is a good food-fish, frequently taken about Jalapa, 
Havana, and on the Isthmus of Panama. Its lips are very 
thick and its teeth are broad, serrated, loosely inserted incisors. 
Fossil mullets are few. Mugil radobojanus is the earliest 
from the Miocene of Croatia. 
The Barracudas: Sphyrenide.—The Sphyrenide, or barracu- 
das, differ from the mullets in the presence of very strong 
teeth in the bones of the large mouth. The lateral line is also 
developed, there is no gizzard, and there are numerous minor 
modifications connected with the food and habits. The species 
are long, slender swift fishes, powerful in swimming and vora- 
cious to the last degree. Some of the species reach a length of 
six feet or more, and these are almost as dangerous to bathers 
