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MR. R. LYDEKKER OX ORNITTIOSAURIAX REMAINS 



large size are evidently cervieals. They are somewhat smaller than 

 those of the specimen represented in fig. 1 of ZitteFs pbite. The 

 arches and spine are not well preserved, hut the inferior aspect of 

 the centra (%. 1) is entire. These exhihit a feature which at the 



Ehamphorhynchiis Jessoni. — 1. Left-lateral and ventral aspects of two cervical 

 vertebras ; r, rib-facet. 2. Left-lateral and ventral aspects of a dorsal ver- 

 tebra. 3. Ventral aspect of the left feinur. 4. Ventral aspect of the left 

 innominate; ac, acetabulum. (All the figures are twice the natural 

 size.) 



time Professor Huxley wrote his 'Anatomy of Yertebrated Animals ' 

 had not been observed, but which has subsequently been recorded 

 by Dr. Baur in the genus Bhamphorluinclius. This feature is the 

 presence of a distinct rib-facet at the lateral border of the inferior 

 surface of the centrum, thus proving the existence of cervical ribs at 

 least in this genus of Pterodactyles. 



Another vertebra which calls for notice is an entire dorsal. The 

 most noticeable feature of this specimen (fig. 2) is the lowness and 

 length (antero-posteriorly) of the neural spine, which strikingly 

 recalls that of a bird. There is no rib-facet on the centrum, and 

 apparently none on the arch, so that the rib was probably supported 

 entirely on the transverse process, as in crocodiles. An imperfect 

 sacral vertebra show^s the widely expanded sacral ribs anchylosed to 

 the centrum, and corresponding in size with the sacral processes of 

 the ilium. 



The femur, as I have placed the two fragments, measures about 

 one inch in length. The globular head is set very obliquely to the 

 shaft by means of a long 'neck;' there is no inner trochanter, 

 although the posterior surface of the shaft shows a distinct linea 

 aspera. 



The specimens under consideration are of interest, not only ns the 

 first recorded evidence of anOrnithosaurian in the 0:?fi'oid Clav, but 



