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disappeared, and the remainder have been partially destroyed, so tliat it can not be determined whether the walls once completely surrounded the inclosure or whether passageways were left in the corners or other places. Doctor Stahl mentions one of these sites near the source of the Bayamon river, on the border of Aguas Buenas and Bayamon. Another was found on the banks of the Manati river, in the high mountains o'f Corosal.
The ball courts examined by the present author were situated for
the most part on terraces or on land fringing rivers, elevated high enough to be above freshets, and yet lying in river valleys that could be cultivated. The center of the inclosure is ordinarily lower than the surrounding plain. In most instances the alignment of the stones bas been disturbëd, and none of these structures which bas been examined has an unbroken surrounding wall. As a rule, only a few of thé stones which once composed them now stand upright. Many of these structures are now found in the mountains but there is good evidence that in prehistoric times they were most numerous on the coastal plains. The latter regions are now given up mostly to sugar cultivation and have been planted with cane for so many years that all traces of aboriginal structures in them have been completely obliterated. Along the banks of the Rio Grande de Arecibo and its tributaries there are still found.many remuants of bail courts, especially in the high mountains in the middle of the island. At present the best preserved are found near the towns Utuado and Adjuntas. There is a good specimen about 50 steps from the main road between Utuado and Adjuntas, just north of the latter town. ·
During his archeological studies in Utuado in 1903 over 20 5<~ys were brought to the author's attention, the most important and bestpreserved being somewhat distant from that town. The following may be mentioned as the best known: (1) Cayuco, (2) Arenas, (3) Salto Arriba, (4) Vivi Abajo, (5) Jayuya, (6) Mameyes, (7) Paso del Palma, (8) Alonso, (9) Alfonso, (10) several in the barrios of Utuado.
Just outside the boundary wall of everyone of the inclosures studied
by the author there were found one or more low mounds which bear superficial ev idences of having been made by human hands. Excavations in one of these mounds near Utuado were made by the writer in 1903, and a brief reference to the result of his work appears in the following quotation from his account of Porto Rican pictography: a
In my studies of one of these inclosures at Utuado I found that the main road
from that town to Adjuntas had eut through the edge of one of the mounds, b revealing, a few feet below the surface, a layer of soil containing fragments of pottery, a few broken celts, and the long bones of an adult. This discovery induced me to extend a trench diametrically through the mound, parallel with the sides of the <t~lmerM'<mJLH</fmpo!ûs'M, n. s., v., no. 3, 457, 1903.
b The author identifies tnese mounds with the caneys mentioned by Antonio Bachiller y Morales
in his well-known work, Cuba Primitiva.