INDEX. 359 



Sea-worm may be multiplied by being cut in pieces, i. 365. 

 See Polypus. 



Seal resembles both a quadruped in some respects, and a fish 

 in others; its description; the varieties innumerable; the 

 brain largest of any animal ; its tongue differs from other 

 quadrupeds ; the foramen ovale in its heart never closing, 

 fits it for continuing under water, though not so long as 

 fishes ; the water its habitation, and any fish its food ; makes 

 little use of its legs ; seldom at a distance from the shore ; 

 found in the North and Icy Seas, and on those shores in 

 flocks, basking on the rocks, and suckling their young; 

 alarmed, they plunge all together into the water ; in thun- 

 der and torrents they sport along the shore, as delighted 

 with universal disorder ; gregarious and migrant, direct 

 their course to northern coasts and seas free of ice, ob- 

 serving time and track ; how and by what passages they 

 return, unknown ; they go out fat, and return lean ; females 

 in our climate bring forth in winter ; where they rear their 

 young, iii. 260. How they suckle them ; she has four 

 teats ; in fifteen days she brings the young to the water, 

 to swim and get food ; no litter exceeds four ; the young 

 know the mother's voice among the bleatings of the old ; 

 assist each other in danger, and are obedient to her call ; 

 hunt and herd together, and have a variety of tones like 

 dogs and cats, to pursue prey, or warn of danger ; feeling 

 natural desires, they fight desperately, and the victorious 

 male keeps all to himself; two never fall upon one, each has 

 its antagonist; neither length of time in pregnancy, nor 

 duration of these animals' lives, yet known; two taken young, 

 after ten years had the marks of age ; expert at catching 

 fish ; destroy herrings by thousands ; swift in deep waters, 

 and dive with rapidity ; attacked with stones, they bite at 

 what is thrown, and to the last gasp annoy the enemy ; time 

 to surprise them ; how the Europeans and Greenlanders 

 destroy them ; in our climate they are wary, and suffer no 

 approach ; never sleep without moving, and seldom more 

 than a minute ; taken for their skin and oil ; uses of the 

 skin when dressed ; the flesh formerly at the tables of the 

 great ; an instance of it ; the sea-lion, in Anson's Voyage, 

 the largest of the seal family, 266. 



Secretary-bird devours serpents, iv. 107. 



Seeds, some thought to thrive better for maceration in the 

 stomach of birds, before they be voided on the ground, 

 iv. 256. 



Sensations, their illusion when man is newly brought into 

 existence, ii. 53. Fish fall behind terrestrial animals in 

 their sensations, v. 6. 



Senses, acting at some distance, proportionably more capable 

 of making combinations ; and, consequently, more improve- 



