Fig. 1. 
Fig. 2. 
Fig. 3. 
Fig. 4. 
Fig. 5. 
MUSEUM OF COMPARATIVE ZOOLOGY. 287 
EXPLANATION OF THE PLATES. 
PLATE L 
Geologie Section across the Island of Cuba from Havana to Batabano. 
Seale, 5 inches to 1 mile. (1) Pre-Tertiary Formations. (2) Tertiary 
Limestones. (3) Soboruco Reef. (4) Mud Deposit of Batabanos. 
Detail of Moro Plateau, North End of above Section. Figures have same 
reference. 
Dike near Water-Works, South Edge of Havana. (1) Dike Material. 
(2) The same, more weathered. (5) Supposed Cretaceous Clays. 
(4) Surface showing Tertiary Limestone on right. 
Geological Section of the Cafion of the Rio Yumuri of Matanzas. (1) Mas- 
sive Coralline Cantera, Reef Rock, 85 feet. (2) More Arenaceous Lime- 
stone, with Molluscan Remains, 15 feet. (3) Stratified Calcareous Clay, 
with Molluscan Remains, 10 feet. (4) Same, with great number of small 
Pebbles. (5) A very white Lime Material, with Bands of Clay. (6) At 
Base. (7) Calcareous Matrix, with Pebble, 103 feet. (8,9, 10, 11) Mio- 
cene Limestone with Molluscan Remains, becoming arenaceous at 
Base (12). 
Section at Baracoa. (a) Sea Level; (b) Elevated Reef Level; (c) Military 
Hospital Level; (d) Cuchilla High Lands (1827), Yunque Level; (e) Ra- 
diolarian Hill. (1) Soboruco. (2) Miocene (?) Limestone. (3) Yellow 
Clays with Miocene Mollusca. (4) Hill of Radiolarian Earth. 
The Cafion and Terraces of the River Yumuri of the East. Vertical height, 
600 feet. 
Section near Aguacate, showing Decay of Limestone into Red Residual 
Soil. 
. Ideal Illustration of the Epochs of Elevation in Cuba. (1) Soboruco or 
Elevated Reef. .(2) Cliffs of the Coast. (3) The Cuchilla Level. 
(4) The Yunque Level. (5) The Sierra Maestra. 
PLATE II. . 
The Evolution of the Circular Harbors of the North Coast of Cuba. 
Figs. 1, 2. Mouths of simple Rivers, with Fringing Reefs growing off their Points. 
(1) The Yumuri of the East. (2) The Limones. 
Figs. 5, 6, 8. The Development of the Circular Bay, by Erosion of the softer Ma- 
terial back of the harder Points of elevated Reef Rock. (5 and 8, Mata 
Bay ; 6, Baracoa.) 
