OR, PLAIN TEACHING. 



cow," etc. The walrus feeds 

 upon marine plants, and the small 

 animals that inhabit them; its 

 long tusks are for the purpose of 

 rooting up the plants that form 

 its food; it also uses these tusks 

 to defend itself when attacked. 

 Large herds of these animals 

 gather upon the ice, and at other 

 times quit the water, and venture 

 some distance upon the land. In 

 the Mediterranean and Indian 

 seas, the dolphin (Delphwus 



delphis), 15, and in the same 

 waters, as well as on the Ame- 

 rican and European coasts, the 

 porpoise (Phocoena vulgaris), 16, 

 pursue their gambols and chase 

 their prey.* In 

 tropical seas, the cu- 

 rious family of Chce- 

 todons, 17, display 

 their singular forms 

 and brilliant co- 

 lours. There, too, 

 the nautilus (Nau- 

 tilus Pompilius), 18, 

 117 - spreads out its 

 membranous ten 

 tacles, 19, and 

 glides like a fairy 

 ship upon the gol- 

 den sea ; and the 

 Jlying fish (PJxo- us. 



* Whales, porpoises, and the dolphin mentioned, are 

 notfishes, although they inhabit the sea. SSee the 

 classification of fishes (pisces), and also the order 

 Cetaeea- 



eel us volitans), 20, darting from 

 the pursuing dolphin, springs 

 into the air, and 

 after a brief 

 flight drops into 

 its native ele- 

 ment. 



In the seas 

 which surround th e British islands, 

 fishes of many varieties abound, 

 among them the herring (Clupea 

 Harengus), 1; the bream (Abra- 



119. 



120. 



mis brama),2; the cod (Gadus 

 collar us), 3; the mqckarel (Scom- 

 ber scomber), 4; the plaice (Pleu- 

 ronectes platessa), 5 ; the sole 

 (Pleuronectes solea), 6; the turbot, 

 (Pleuronectes maximus), 7 ; the 

 conger eel (Anguilla conger)^ 8; 

 and numerous others. 



Besides these, there are many 

 Crustaceans: the shrimp (Crangon 

 vulgaris), 9; the prawn (Paloemon 

 serratus), 10; the lobster (Homa* 



