HOLLAND AND PETERSON: OSTEOLOGY OF THE CHALICOTHEROIDEA. 7453) 
Catalog No. 1722. 
This consists of a small and quite perfect atlas, and the third, fourth, and 
seventh cervicals. The bones belonged to a small and very immature individual, 
and with the exception of the atlas, are not in very good condition, having been 
somewhat broken. 
Catalog No. 1722A. 
This consists of the fourth, fifth, and seventh cervicals of a quite small and 
immature individual. All the bones are in a somewhat fragmentary condition. 
Catalog No. 1728. 
The series placed under this number consists of the third, fourth, and fifth 
cervicals, a fragment of the sixth (?), and a seventh cervical. The latter is in 
comparatively good condition, as is also the fifth. The other members of the 
series are more or less fragmentary. ‘The specimens represent an individual of 
small size, retaining the posterior and anterior epiphyses, thus indicating a 
maturer development than in the two preceding series, which have been mentioned. 
Catalog No. 1724. 
The specimens assembled under this number consist of a very well preserved 
atlas, an axis, and the third, fourth, and fifth cervicals in a more or less broken 
condition. ‘The specimen to which these bones belonged was apparently some- 
what smaller in size than the specimen accessed as No. 1723, and the posterior 
epiphyses of the centra have all slipped. 
Catalog No. 1725A. 
This series consists of an axis, together with the fourth, fifth, and sixth cervicals. 
The axis is in fairly good condition. The other vertebrae have sustained extensive 
injuries through breakage. The bones represent an individual of medium size. 
Catalog No. 1726. 
This consists of a single atlas of quite small size, but in perfect condition. 
Catalog No. 1727. 
Under this number has been placed a large and beautifully preserved atlas. 
Catalog No. 1728. 
Under this number there has been cataloged a medium-sized, but singularly 
perfect atlas. 
