M. Bonpland And I Observed In A Crocodile, Eleven Feet Long, Which We Dissected At Batallez, On The Banks Of The Rio Magdalena, That The Stomach Of This Reptile Contained Half-Digested Fish, And Rounded Fragments Of Granite Three Or Four Inches In Diameter.

It is difficult to admit that the crocodiles swallow these stony masses accidentally, for they do not catch fish with their lower jaw resting on the ground at the bottom of the river.

The Indians have framed the absurd hypothesis that these indolent animals like to augment their weight, that they may have less trouble in diving. I rather think that they load their stomach with large pebbles to excite an abundant secretion of the gastric juice. The experiments of Majendie render this explanation extremely probable. With respect to the habit of the granivorous birds, particularly the gallinaceae and ostriches, of swallowing sand and small pebbles, it has been hitherto attributed to an instinctive desire of accelerating the trituration of the aliments in a muscular and thick stomach.

We have mentioned that tribes of Negroes on the Gambia mingle clay with their rice. Some families of Ottomacs were perhaps formerly accustomed to cause the maize and other farinaceous seeds to rot in their poya, in order to eat earth and amylaceous matter together: possibly it was a preparation of this kind, that Father Gumilla described indistinctly in the first volume of his work when he affirms that the Guamos and the Ottomacs feed upon earth only because it is impregnated with the sustancia del maiz (substance of maize) and the fat of the cayman. I have already observed that neither the present missionary of Uruana, nor Fray Juan Gonzales, who lived long in those countries, knew anything of this mixture of animal and vegetable substances with the poya. Perhaps Father Gumilla has confounded the preparation of the earth which the natives swallow with the custom they still retain (of which M. Bonpland acquired the certainty on the spot) of burying in the ground the beans of a species of mimosacea,* (* Of the genus Inga.) to cause them to enter into decomposition so as to reduce them into a white bread, savoury, but difficult of digestion. I repeat that the balls of poya, which we took from the winter stores of the Indians, contained no trace of animal fat, or of amylaceous matter. Gumilla being one of the most credulous travellers we know, it almost perplexes us to credit facts which even he has thought fit to reject. In the second volume of his work he however gainsays a great part of what he advanced in the first; he no longer doubts that half at least (a lo menos) of the bread of the Ottomacs and the Guamos is clay. He asserts, that children and full grown persons not only eat this bread without suffering in their health, but also great pieces of pure clay (muchos terrones de pura greda.) He adds that those who feel a weight on the stomach physic themselves with the fat of the crocodile which restores their appetite and enables them to continue to eat pure earth.* (* Gumilla volume 2 page 260.) It is certain that the Guamos are very fond, if not of the fat, at least of the flesh of the crocodile, which appeared to us white, and without any smell of musk.

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