Circulatory System Special. 107 



is represented by a plexus, and occupies mucli of the haemapopliysial 

 canal. 



5. "IhQ Blood. 



Oval discs. 



Artiodactyla. The Camelidce, (e.g. Dromedary, Llama, Vicunga) 

 have elliptical blood discs : but these are equally non-nucleate with 

 the ordinary circular blood discs ; and adhere to the Ruminant 

 characteristic of minuteness of size. 



Sue of discs. 



The two extremes of size observed in the Mammalian class are in 

 Elephas Indicus 2745, and Moschus Javanicus y^^^. 



Artiodactyla. An unusually small size of the blood discs is asso- 

 ciated with the peculiarities of the Ruminant structure. 



W. Hewson. 



