Occasional Papers of the Museum of Zoology 31 



older limestone escarpments near the northeastern shores. At 

 Fontein van Bonaire, and at Hato van Curasao, these tiny 

 rivulets are piped into cement tanks, but at Fontein van Aruba 

 (Ac2) a little stream escapes from the roughly dammed 

 reservoir at its source. All of this water is heavily charged 

 with mineral matter in solution, and a large proportion of the 

 stagnant pools are so brackish as to be undrinkable. 



Station Cc2. Reservoir, Campo WilhelmiTia (fig. I-l, 2-D ; 

 L68° 50.57', 12° 5.38'). In front of Landhuis Wilhelmina a 

 small tank is supplied by a windmill. The water is drinkable. 



Station Cell. Pond, Seroe Papaja (11-N; L68° 57.31', 

 12° 10.63'). In a rooi at the western end of Seroe Papaja, a 

 clay dike retains a small, but apparently permanent pool of 

 foul, bitter water. Only dead shells were found. 



Station Ccl3. Sint Marie Spring (13-S; L69° 4.53', 

 12° 11.86'). Near the western end of Seroe Largoe (13-R), 

 and not far from the shore of Salinja Sint Marie (9-G), 

 seepage forms a small, but permanent pool of quite fresh 

 water. The shells were collected on dead leaves and in the 

 algae. 



Station Ccl7. Pond, Campo Lagoen (17-L; L69° 9.70' 

 12° 19.83'). The rooi that issues from the valley of Newtown 

 has been excavated and walled with stone so that a permanent 

 pool is retained. The water is utilized for stock animals. 



Station Ac2. Fontein van Aruha (fig. 1-3, H; L69° 54.74', 

 12° 29.54'). On the extremely barren northeastern side of 

 Aruba, shoreward from the principal escarpment of the older 

 limestone, is an oppressively arid zone of limestone or older 

 rock, which, in places, is buried under rather extensive sand- 

 dunes. Approach to Fontein from the south reveals what ap- 

 pears to be a bank, covered with dead brush, which extends 

 from near the escarpment almost to the shore (fig. v-11). Pene- 

 tration between this and the cliffs discloses that it is a wind- 

 break of living thorn trees, which protects a garden of fruits 

 and bananas. The cause of this abrupt change is the Fontein, 

 which is roughly dammed at its source under the cliffs, but 

 escapes as a small stream, about a foot wide by the same deep, 



