SAURUR*:. 



tibia. The metatarsals are fused together, and there are four clawed 

 digits (nos. I to iv) with the phalangeal formula 2, 3, 4, 5. Slender 

 abdominal ribs are observable in the ventral wall of the body-cavity. The 

 impressions of feathers seem to prove that there are seven primary and 

 ten secondary remiges in the wing, while these are distinctly overlain with 

 coverts ; the quill- feathers of the tail are arranged in pairs, one apparently 

 for each vertebra. Contour feathers are also recognisable on the neck, 

 perhaps also round the tibia. All the known remains of this bird have 



FIG. 142. 



Archceopteryx macnira ; restoration by W. P. Pycraft, about one-quarter nat. 

 size. U. Jurassic (Lithographic Stone) ; Bavaria. The tail appears 

 pointed because foreshortened in the drawing. 



been obtained from the Lithographic Stone (Lower Kimmeridgian) of 

 Bavaria. The name Archceopteryx lithographica was originally given to a 

 detached feather. A nearly complete skeleton, wanting the head, now in 

 the British Museum, is described as Archceopteryx macrura; and a still 

 more nearly complete skeleton, with the head, now in the Berlin Museum, 

 is named Archceopteryx siemensi, apparently showing several differences in 

 the proportions of the bones. These specimens are about as large as an 

 ordinary rook. 



