November 12, 1891] 



NATURE 



Fig. I.— Right lateral aspect of the skull o{ Archaopteryx macnira, Owen, 

 from the Lithographic stone, Lower Kimmeridgian, Solenhofen, Bavaria 

 (1). (After Dames, *' Palaontologische Abhandliingen," vol. ii., 1884. ) 



Fig. 2.— Restored skeleton oi Hesperomis regalis. Marsh (1870), from the 

 Cretaceous of Kansas, North America (about J natural size). (Repro- 

 duced, by permission, from Prof O. C. Marsh's "Extinct Toothed Birds 

 of North America " (folio), New Haven, Conn., U.S., 1880.) 



Fig. 3.— Restored skeleton of Tchthyorm's victor. Marsh (1872), from the 

 Cretaceous of Kansas (} natural size). (Reproduced, by permission, 

 from Prof. Marsh's " Extinct Toothed Birds of North America" (folio) 

 New Haven, Conn., US., 1880.) 



Fig. 4.— Restored skeleton of Dinomis {Pachyoniis) elephantopus, Owen, 

 from Pleistocene deposits. Oamaru Point, South Island. New Zealand 

 (about jV natural size). (Original in British Museum, N.H.) 





