HABIIS OF THE FLOUNDER, ETC. 457 
life, while all the facial bones of the skull are still cartilagi 
nous, long before they become hard and ossified, 7.¢., when 
the flounder (Plagusia) is twenty-five millimetres (one inch) 
long. ‘‘The transfer of the eye from the right side to the 
left takes place by means of a movement of translation, ac- 
companied and supplemented by a movement of rotation 
over the frontal bone.” Young flounders, when less than 
two inches in length, are remarkably active compared with 
the adults, darting rapidly through the water after their 
food, which consists principally of larval, surface-swimming 
crustaceans, etc. (A. Agassiz.) The common flounder from 
Nova Scotia to Cape Hatteras is Psewdoplewronectes Amer i- 
canus of Gill. 
Fig. 415.—Goose-fish, one tenth natural size.—From Tenney'‘s Zoology. 
Order 6. Pediculatt.—The type of this order is the goose- 
fish, The name was given to the group from the long 
slender bones supporting the pectoral fins. The gill-open- 
ings are small and placed in axils of the pectoral fins. Lo- 
phius piscatorius Linn., the goose-fish or angler (Fig. 415), 
has an enormous mouth, and swallows fishes nearly as large 
as itself. The head and fore-part of the body is very large , 
the skin is naked, scaleless. Its eggs are laid in broad, 
ribbon-like, thin gelatinous masses, two metres long and 
half a metre wide, which float on the surface of the 
ocean. 
Order %. Lophobranchii. —The tufted-gilled fish—such the , 
name of the order indicates—have a fibro-cartilaginous skele- 
