LIST OF ILLUSTRATIONS— TEXT FIGURES v 



Page 



The cuestas and lowlands of western New York 17 



Diagrammatic representation of the essential relief features of northern New 



York City, with cross-sections showing the underground structure 18 



Diagrammatic representation of the essential relief features of the Hacketts- 



town, New Jersey, region 19 



The Cretaceous and Tertiary levels as seen looking west from the base of 



Schooley Mountain, south of Hackettstown, New Jersey 20 



Diagrammatic representation of the main relief features in the Delaware Water 



Gap region 20 



Diagrammatic representation of the essential relief features of the southern 



Connecticut Valley 21 



Diagrammatic representation of the essential relief features of the Harrisburg 



region 22 



View upstream from the summit of Blue Mountain at the Susquehanna Water 



Gap 23 



The great stone arch bridge of the Pennsylvania Railroad at the Susquehanna 



Water Gap •. 24 



Diagrammatic representation of the essential relief features of the Altoona 



region 25 



Vista down the open trough of Lake George 27 



A typical portion of the well developed New England peneplane with isolated 



monadnocks in southern New Hampshire 28 



The cirques on the east side of Mt. Washington in the White Mountains 29 



Diagrammatic representation of the essential relief features of the Blue Ridge 



and Piedmont region 30 



Diagrammatic representation of the principal relief elements of the Wyoming, 



or northern, anthracite coal basin 32 



Diagrammatic representation of the main relief features at Niagara Falls 34 



Block Diagram showing the Relief Features of Northern New Jersey (loosely 



inserted map) 



Mandible of Neoceratodus forsteri with the tendinous fascia of the adductor 



mandibular muscle 81 



Variations of the digastric in mammals 107 



(1) Outline restoration of Coccosteus, a primitive arthrodire, (2) Outline restora- 

 tion of an antiarch, Bothriolepis, (3) Longitudinal section of Bothriolepis, 



(4) Outline of Pterichthys 122 



Dermal jaw bones of various arthrodires, lateral surfaces; from specimens in the 



American Museum of Natural History 125 



Skull of a pseudosuchian, Euparkeria capensis 132 



Eleutherodactylus auriculatus 171 



Embryo of Eleutherodactylus auriculatus 172 



Eleutherodactylus gryllus, new species 173 



Eleutherodactylus locustus, new species 175 



Eleutherodactylus cramptoni, new species 177 



Eleutherodactylus antillensis (Reinhardt and Liitken) 178 



Eleutherodactylus brittoni, new species 180 



Eleutherodactylus wightmanae, new species 182 



Eleutherodactylus richmondi, Stejneger 184 



