Occasional Papers of the Museum of Zoology 29 



ments. Near the shore, the surface is very barren (compare 

 CIO), but at the summit of the leeward cliffs, where this col- 

 lection was made, scattered trees indicate a richer environment. 



Station B8. Seroe Wassau (T; L68° 22.58', 12° 14.18'). 

 West of the Salinja Goto (U), the older limestone forms a 

 rather high hill. The top (123.5 meters) and eastern slopes 

 are considerably more barren than B3, 4, 5 and 6, but the base 

 of the northern escarpment has developed quite rich vegeta- 

 tion. Collections were made in both portions. 



Station B9. Seroe Grandi (V; L68° 21.33', 12° 17.78'). At 

 the northern end of Bonaire, the narrow shore zone of the 

 older limestone is excessively barren and arid. In a few 

 places, the inner edge rises into hills with steep, southern 

 escarpments. The largest of these, Seroe Grandi, protects a 

 sparse growth of acacias and organ-pipe cacti. The molluscs 

 mainly occur at the base of the escarpment, around and on 

 the cacti. 



Station Bh3. Seroe Grandi (I; L68° 16.01', 12° 11.07'). 

 "Big Mountain" is a rather common name in the Dutch Lee- 

 ward Islands. This one is a monadnock (115.3 meters) of 

 Cretaceous rocks, near the southeastern end of the main axis 

 of the island. The leeward slopes are quite well wooded. This 

 is the type locality of A7iolis honairensis Ruthven.^" 



Station Bh5. Traai Montagne (N; L68° 16.35', 12° 12.78'). 

 Near the eastern slope of Seroe Largoe, the somewhat sparser 

 vegetation in the region of Cretaceous rocks quite closely re- 

 sembles the open groves of the limestone area near Porta 

 Spaiio (B5). 



Station Bh7. Inland from Punta Blanco (S; L68° 13.17', 

 12° 10.18'). Behind the protection of the eastern rim, the 

 richer valleys of the central region develop thickets of brush 

 interspersed with larger trees. ]\Iany localities show, by their 

 reddish soil, that the erosion of the limestone cap has been 

 comparatively recent. 



Station Bh9. Base of Seroe Brandaris (W; L68° 23.97', 



30 1923 ; Occ. Papers Mus. Zool. Univ. Mich., no. 143, pp. 4-5. 



