(ECONOMY 
S4 
Fijhes inhabit cold waters, and mod of them 
have cold blood •, whence it happens that they 
have not heat fufficient to produce the foetus . 
The all-wife Creator therefore has ordained, 
that molt of them fhould lay their eggs upon 
the fhore ; where, by means of the folar rays, 
the water is warmer, and alfo fitter for that 
purpofe *, becaufe it is there lefs impregnated 
with fait, and confequently milder; and alfo 
becaufe water-infe6ts abound more there, which 
afford the young fry a nourifhment. 
Salmons in the like manner, when they are 
about to lay their eggs, are led by inftincl to 
go up the flream, where the water is frefh and 
more pure. 
The butterfly fijh is an exception, for that 
brings forth its foetus alive. 
The fijhes of the ocean , which cannot reach 
the fliores by reafon of the diftance, are alfo 
exempt from this law. The Author of nature 
to this kind has given eggs that fwim ; fo that 
they are hatched amidft the fwi mining fucus y 
called fargazo. Flor. Zeilon. 389. 
The cetaceous fifh have warm blood, and 
therefore they bring forth their young aljve, 
and fuckle them with their teats. 
Many 
