PLATE V. 
Fig. A. Upper end of Kauya Hoora Gorge, Trenton Falls, N. Y., embracing 
the upper third of the Trenton limestone, from D 18 to D 23. 
Exhibits black thin bedded limestones below, and above them 
the heavy gray crystalline capping. Photograped by Theodore 
G. White, November, 1895. 
Fig. B. Palaeospondylus gunni, Traquair < ;'5. From drawing with Abbé 
camera. BW, line indicating the marginal body wall. PO, 
postoccipital plates of Traquair. RS, radial-like supports (of 
paired fins). To illustrate paper by Bashford Dean, p. 101. 
