Ch. Vi. SOUTH AMERICA.- 2S3 



cics very remarkable: the firft is called Choros, 

 already mentioned in our defcription of Lima; the 

 iecond is called Pies de Burros, aíTes feecj and the 

 third Bulgados, and thcie to me icem to preclude ali 

 manner of doubt that they were originally produced 

 in that fea, from whence thcv were carried by ihe 

 waters, and depofited in the places where they are 

 now found. 



I HAVE examined thefe parts with the clofeil atten- 

 tion, and found no manner of veOige of fubtcrraiieous 

 fires. No calcinations are to be met with on the 

 furface of the eirth, nor among the ilieils ; which, as Í 

 have already obfcrved, are not intermixed with earth j 

 nor are there ftones, or any other heterogeneous 

 fubflances found among them. Some of theic Cndls 

 are entire, others broken ; as mull naturally happen 

 in fuch a clfife compreiH n of f-hem, during io long 

 an interval of time. Thib circumftañcc, Lcwcver trifling 

 it may appear to fome, may deferve the coniiuciatioa 

 of t!)ole who have adv'anced the notion, that fiiells may 

 be formed in the earth by fubterraneous fires, co ope» 

 radng with the nature of the foil. 



The Pie de Burro, has its nam.e from the .fiih in- 

 cloied in it, refembling, when taken out, ti.c. fool; of 

 an afs. This fiili is of a dark brown colour, firm and 

 filaceous i it is an univalve, its mouth alnoft. circular, 

 and its diameter about three inches. TJie bottom of 

 the ihelj is concave within, and convex without. The 

 colour within is perfedly white, the furfice y a y 

 fmooth; the outfide fcabrous and full of tubercles. 

 Its thicknefb in every part is about four or five lines; 

 and being large, compaft, and heavy, is preferred 

 to all others for making lime. 



The Bulgados, in, the Canaries called bulgaos, are 

 fnails, not at ail dificring in their form from the com- 

 mon ; but larger than thole of the lame name found in 

 gardens, being from two inches, to two inches and a 

 half in diameter. The (hell is alfo very thick, rough 



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