460 



ZOOLOGY. 



life, while all the facial bones of the skull are still cartilagi- 

 nous, long before they become hard and ossified, i.e., 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 Pseudopleuronectes Ameri- 

 canus of Gill. 



Fig. 423. — Goose-fish, one tenth natural size. — From Tenney^s Zoology. 



Order 6. Pediculati. — The 

 flsh. The name was given 

 slender bones supporting the 

 ings are small and placed in 

 pMus j)iscatoriiis Linn., the 

 has an enormous mouth, and 

 as itself. The head and fore- 

 the skin is naked, scaleless. 

 ribbon-like, thin gelatinous 

 half a metre wide, which 

 ocean. 



Order 7. Lophobranchii. —The tufted-gilled fish — such the 

 name of the order indicates — have a fibro-cartilaginous skele- 



type of this order is the goose- 

 to the group from the long 

 pectoral fins. The gill-open- 

 axils of the pectoral fins. Lo- 

 goose-fish or angler (Fig. 423), 

 swallows fishes nearly as large 

 •part of the body is very large •, 

 Its eggs are laid in broad, 

 masses, two metres long and 

 float on the surface of the 



