iv ANNALS OF THE NEW YORK ACADEMY OF SCIENCES 



LIST OF ILLUSTRATIONS 



Plates 



I. — Jaw muscles of Scyllium and Acanthias, representing the Elasmobranchii, 



and of Acipenser and Polyodon, representing the Chondrostei. 

 II. — Jaw muscles of Amia and Lepidosteus, representing the Ganoidei Holostei, 



and of Anguilla, representing the Teleostei Apodes. 

 III. — Jaw muscles of Esox, representing the Teleostei Haplomi, and of Palinu- 



richtyhs, representing the Teleostei Acanthopterygii. 

 IV. — Jaw muscles of Polypterus, representing the Crossopterygii, and of Neocera- 

 todus, representing the Dipnoi. 

 V. — Jaw muscles of Rana, representing the Anura, and of Cryptobranchus 



japonicus, Amphiuma and Amblystoma, representing the Urodela. 

 VI. — Jaw muscles of monimostylic reptiles: Chelydra, Sphenodon, and Alligator. 

 The pretrematic muscles (innervated by V3) are seen in front of the audi- 

 tory region, the posttrematic muscles (innervated by VII) are seen 

 behind it. 

 VII. — Jaw muscles of streptostylic reptiles: Iguana and Varanus. 

 VIII. — Jaw muscles of a typical bird: Gallus. 

 IX. — Jaw muscles of monotremes: Ornithorhynchus, Echidna. After Schulman. 

 X. — Jaw muscles of typical mammals: Didelphys, Solenodon, Mus, and Homo. 

 XL — Partial reconstruction of the jaw muscles of Dinichthys, representing the 



Arthrodira. 

 XII. — Restoration of the jaw muscles of Eryops, representing the Temnospondyli, 



and of Labidosaurus, representing the Cotylosauria. 

 XIII. — Restoration of the jaw muscles of Tyrannosaurus, representing the Dino- 

 sauria Theropoda, and of Cynognathus, representing the Therapsida. 



Text Figures 



Page 

 Generalized geological map and typical cross-sections of the region within a 



radius of 300 miles of New York City 3 



Outline map of northeastern United States showing the limits of the main 



physiographic provinces \ 5 



Diagrammatic map of northeastern United States showing the salient relief 



features 7 



Sketch of New England peneplane having an elevation of 1,400 feet in western 



Massachusetts 8 



Sketches in the Hudson Highlands 9 



View looking down the Hudson River at Haverstraw, New York 10 



Features of local glaciation in the White Mountains 11 



Characteristic view and map of portions of the terminal moraine 12 



The largest erratic on Long Island and one of the largest in the eastern United 



States 13 



Characteristic view and map of glacial drumlins 14 



Giant sand dunes on Cape Henry, Virginia, encroaching upon an evergreen 



forest which borders the coast 15 



Profile view of the coastal plain cuesta, near Clementon, New Jersey 16 



