134 OF INSTINCT. Sect. XVI. 14. 3. 



to prey upon the latter, and in fome years devour fuch immenfe 

 quantities as to render this filhery more expenfive than profita- 

 ble. 



?. The remora, when he wifhes to remove his fituation, as 

 be is a very flow fwimmer, is content to take an outfide place 

 on whatever conveyance is going his way •, nor can the cunning 

 animal be tempted to quit his hold of a Ihip when (he is failing, 

 not even for the lucre of a piece of pork, left it fhould endan- 

 ger the lofs of his palTage : at other times he is eafily caught with 

 the hook. 



4. The crab-fiih, like many other teftaceous animals, annu- 

 ally changes its (hell ; it is then in a foft ftate, covered only 

 with a mucous membrane, and conceals itfelf in holes in the 

 find or under weeds ; at this place a hard fhelled crab always 

 ftands centinel, to prevent the fca infects from injuring the other 

 in its defencelefs ftate ; and the fifhermen from his appearance 

 inow where to find the foft ones, which they ufe for baits in 

 catching other fiih. 



And though the hard fhelled crab, when he is on this duty, 

 advances boldly to meet the foe, and will with difficulty quit 

 the field ; yet at other times he fhews great timidity, and has a 

 wonderful fpeed in attempting his efcape •, and, if often inter- 

 rupted, will pretend death like the fpider, and watch an oppor- 

 tunity to fink himfeif into the (and, keeping only his eyes above. 

 My ingenious friend Mr. Burdett, who favoured me with thefe 

 accounts at the time he was furveying the coafts, thinks the 

 commerce between the fexes takes place at this time, and in- 

 spires the courage of the creature. 



5. The fhoals of herrings, cods, haddocks, and other fifh, 

 which approach our mores at certain feafons, and quit them at 

 other feafons without leaving one behind ; and the falmon, that 

 periodically frequent our rivers, evince, that there are vagrant 

 tribes of fiih, that perform as regular migrations as the birds of 

 paffage already mentioned. 



6. There is a cataracl on the river LifFey in Ireland about 

 nineteen feet high : here in the falmon feafon many of the inhab- 

 itants amufe themfelves in ob ferving thefe fiih leap up the tor- 

 rent. They dart themfelves quite out of the water as they af- , 

 cend, and frequently fall back many times before they furmount 

 5t, and bafkets made of twigs are placed near the edge of the 

 ftream to catch them in their fail. 



I have obferved, as I have fat by a fpout of water, which de- 



:nds from a {tone trough about two feet into a dream below, 



at particular feafons of the year, a great number of little fiih 



caUed miliums., cr pinks, throw themfelves about twenty times 



their 



