286 RATrT^. 



21746 a. The thirteenth (?) cervical vertebra. 



21737 a. A nearly siuiilar but sliglitly suoaller specimen. 



21728. The fourteenth (?) cervical vertebra. This specimen can be 



readilj' distinguished from the two preceding ones by the 

 much slighter emargination of the anterior border of the 

 neural platform between the prezygapophyses ; a similar 

 difference occurring between the thirteenth and fourteenth 

 cervicals of A. parva. 



21754. The tifteenth (?) cervical vertebra, wanting the postzyga- 

 pophyses. 



32127. The imperfect seventeenth cervical vertebra. The two 

 hgemal processes have almost united in the middle line. 



Walter Mantell Collection. 



32127 a. The imperfect eighteenth and nineteenth cervical vertebrae, 

 associated with the preceding specimen. In each there is 

 a single haemal spine, preceded by a pit ; the centrum of 

 the eighteenth is longer than that of the nineteenth. 



Walter Mantell Collection. 



21729. The slightly imperfect eighteenth cervical vertebra. 



21729 a. The nineteenth cervical vertebra. Resembles the corre- 

 sponding vertebra of No. 32127 a. 



21729 h. The nineteenth cervical vertebra. The neural spine is 

 more produced anteriorly than in the preceding specimen. 



21729 C. The nineteenth cervical vertebra. 



32075. The nineteenth cervical vertebra. 



Walter Mantell Collection. 



21729 d. Tliree specimens of the twentieth cervical vertebra, all 

 wanting the summit of the neui'al spine. 



21735. The imperfect twentieth cervical vertebra. This specimen 

 has a longer and narrower centrum than the preceding 

 examples, and apparently belongs to a different species. 



21745. The twenty-first cervical vertebra, in a slightly imperfect 

 condition. 



21739. Two specimens ot the first dorsal vertebra. 



