ILLUSTRATIONS. 



PAGE. 



Plate I. Physiographic provinces of the Dominican Republic 26 



II. A, South front of the Cordillera Septentrional as seen looking north, 

 from a point east of Santiago; B, El Morro de Monte Cristi as seen 

 from the south side; C, Loma la Cumbre, the summit of the Cordil- 

 lera Septentrional between Altamira and El Aguacate, as seen look- 

 ing northward 28 



III. A, Monte Isabel de Torres; B, Santa Barbara de Samand; C, San- 



chez, showing terraces between the hills and the shore 30 



IV. A, Vega Real, Sabana Liana near El Higo Gordo, province of La 



Vega, with the foothills of the Cordillera Central in the distance; 



B, Valley of Rio Yaque del Norte north of Esperanza 32 



V. A, View northward from Hatillo, 28.5 kilometers northwest of the 

 city of Santo Domingo; B, View southward from Loma Coco be- 

 tween Hatillo and El Madrigal; C, Terrace flat at El Madrigal, on 



Rio Jaina 34 



VI. A, Loma Penita as seen from the trail from Sabaneta to Restau- 

 raci6n; B, Siete Picos, looking northeastward from La Mata, be- 

 tween El Madrigal and Sabana Grande 36 



VII. A, Terraces on Rio Magua above San Pedro de Macoris; B, Sierra 



Prieta; cliff of white limestone; C, Goige of Rio Mao above Bulla.... 40 



VIII. Geologic sketch map of the Dominican Republic 50 



IX. Sketch map of part of Rio Mao showing position of stations at which 



collections of fossils were made 66 



X. Bulla conglomerate interbedded with fossihferous sand northeast of 



Bulla, at east edge of flat on Rio Mao 68 



XL Sketch map of part of Rio Gurabo showing positions of stations at 



which collections of fossils were made 70 



XII. A, Cercado formation on Rio Mao opposite Hato Viejo; B, Gurabo 



formation on Rio Mao just above El Paso Bajito 72 



XIII. A, Gurabo formation en Rio Mao below Cercado de Mao; B, Rio Mao 



seen from top of bluff above El Paso Bajito 74 



XIV. Sketch map of Monte Cristi and vicinity 170 



XV. Geologic map of parts of the provinces of Azua and Barahona 186 



XVI. A, Las Matas de Far fan and Sieira de Neiba as seen from the east; 

 B, View in the Cordillera Central southwestward from a point on 



the Banica-Restauraci6n trail near La Cruz 188 



XVII. A, Young lignum- vitae tree (guayacan) along road near Rio Ocoa; 

 B, Typical exposure of reef corals forming a bench on the south 



side of Lake Enriquillo 198 



XVIII. A, Sandy shale and sandstone of the Yaque group on Rio Yaque 

 del Sur at crossing of Azua-San Juan road; B, View northward, up 



the valley of Rio Yaque del Sur from the vicinity of Boca Mula 208 



XIX. A, Part of Du verge; Sierra de Bahoruco in background; B, Sierra 



de Bahoruco, looking south from San Jose 220 



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