THE EURTPIIARTNX. 
175 
Ladoplirys trigonus, is a West Indian fish; one specimen 
has appeared at Holmes' Hole, Mass. The porcupine-fish 
{CMlichthys turgidits) and smooth puffer {Tetrodon IcBviga- 
tus) and the spring box-fisli {Chilomycterus geometiHcus) 
range from Cape Cod to Florida. The sun-fish {Mola ro- 
hmda, Fig. 221) is, like the others of the order, a surface- 
swimmer. It is sometimes a metre or more in length, 
weighing five hundred pounds or more. 
A very strange fish of unknown affinities is the Bury- 
phary7ix (Fig. 222), which was dredged in the Mediterra- 
nean Sea at a depth of 2300 metres (1200 fathoms). It is 
Fig. 222.—Eurypharynxpel€canoides. From LUtken. 
.47 metres (18 inches) long, with an enormous mouth; it 
is without fins, and it differs from all other bony fishes in 
having six pairs of internal branchial slits and consequently 
five pairs of gills. 
Class V. — Batrachia {Salammiders, Toads, and Frogs), 
General Characters of Batrachians. — We now come to 
air-breathing vertebrates, with legs and lungs, and with ribs. 
The Amphibians, with the exception of the toads and frogs^ 
are often mistaken for lizards, but the skin is always 
smooth, not scaled as in true reptiles, and the toes are not 
provided with claws. These animals are called Amphibiaija 
