Dominican Sections — Maury 



Species in common with Florida.— Comparatively few of our 

 Dominican fossils occur in the Oligocene of Florida. Among 

 these the following may be cited: 



List of Species 



C=Chipola, T=Tampa silex beds, W= White Beach limestone. 

 Terebra bipartita Sby., C. Ostrea haitensis Sby., CO. G. 



Lyria pulchella Sby., T. Liphophaga antillarum d'Orbigny, T, 



Morum domingense Sby., T. Liphophaga nigra d'Orbigny. 



Orthaulax inornatus Gb. , T. W: Phacoides domingensis Dall. 



Area umbonata Lamarck. Pitaria planivieta? Gpy., W. 



Barbatia reticulata Gm., T. and C, Antigona tarquinia Dall, T. 

 Siliqua subaequalis ? Gabb, C. 



Orthaulax links the Tampa beds to the Orthaulax zone. 



Geology op the River Mao 

 Our explorations were made near Cercado de Mao of which a 

 general view is shown in the frontispiece, Bulletin 29, and the 

 location of the hamlet is indicated as number 13 on the Sketch 

 Map facing page 10 of that bulletin. Views of Rio Mao are shown 

 Plates iB and 2B of this bulletin ; photographs were taken by 

 Mr. K. P. Schmidt. Cercado is one of the oldest of the Santo Do- 

 mingo type localities where Colonel Heneken made his first col- 

 lection in 1849.* Our section is a generalized one obtained from 

 successive high bluffs met with on ascending the river. 



Section at Cercado de Mao 



Feet 



Bluff No. 1. A mile above Cercado. Composed of blue clays lo- 

 cally hard and .brittle. No limestone. Fossils abundant and 

 well preserved. Height of bluff approximately 200 



Bluff No. 2. Four miles above Cercado. Blue cla3'3 with layers 

 formed of masses of Foraminifera which appear like fine 

 gravel. Fossil mollusca occur in lenses and are quite abund- 

 ant. Height about 200 



Bluff No. 3. Five miles above Cercado. Bluff composed of blue 

 clays and sand with layers of marl. Telliuas abundant. Fu- 

 coids and Bryozca in the sandy layers. Fauna exceedingly 

 rich. Height approximately 200 



"See Quart. Jour. Geol. Sec. London, vol. 6, 1S50 ; vol. 9, 1853 ; vol., 

 32, 1876. 



