PLATE III 



Plate III is from a section through the upper part of the 

 seventh cervical vertebra posteriorly, the arch of the cricoid car- 

 tilage (Arcus cart, cricoideae) anteriorly and the upper part 

 of the heads of the humeri laterally. The plane of section 

 is 1.8 cm. posteriorly and 1.1 cm. anteriorly below section 

 II so that the anterior margin is 3.8 cm. below the posterior. 



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