292 THOMAS DWIGHT ON 



rower. A smaller one is found on the right below the 3d lumbar, and a still smaller one 

 is found on the same side below the 4th. They suggest epiphyses, but are where there 

 are normally none.^ 



The peculiarity which makes the atlas unicjue is the total absence of the anterior 

 arch. There are cases in which it is represented by ligament or cartilage ; but here it is 

 simply absent, and the front of the odontoid occupies its place. A strong band, which 

 might be called odonto-atloid ligament, extends from each side of the odontoid outward to 

 each lateral mass of the atlas. The right posterior arch of the atlas is represented by a 

 distinct piece attached at each end by ligament to the rest of the bone. Thus each 

 half of the atlas can move independently of the other. The odontoid projects above the 

 neighboring parts of the atlas and bears a smooth facet on its top, slanting forwards, 

 which rested against a fibrous or fibro-cartilaginous mass separating it from a tubercle on 

 the front of the foramen magnum, a spurious third condyle. The superior articular 

 facets of the atlas were but very slightly concave, and the occipital condyles correspond- 

 ingly flat. 



It is unfortunate that no measurements of the spine were made while it was fresh, 

 but those made on the dry vertebrae are very interesting as showing how the thorax, in 

 spite of the want of one vertebra, has even more than the usual length by the greater 

 size of the bodies. 



Height of bodies of 

 No. 267. 



1.3 

 1.3 

 1.3 

 1.3 

 1.6 



6.8 



1.8 

 1.9 

 2.0 

 2.1 

 2.2 

 2.2 

 2.3 

 2.2 

 2.5 

 2.5 

 2.5 . 



24.2 



22.1 



1 These ossifications, as well a.s a part of the occiput, are figured iu the .Jounuil of Anatomy and Physiology (Dwight, '87). 



