Report of National Wluseum, 1893. PLATE 2'^ 



HOMOLOGIES OF THE PRINCIPAL BONES 



The series of which this specimen forms a part is 

 intended to show the corresponding bones in the 

 dirterent classes of vertebrates. The spaced skeleton 

 sh(iiild be compared with the mounted skeleton. 



CtKULL OF SHARK, Girc/ianas sp. an example 

 ^ of the siinijlest type of cranium. It consists entirely 

 of calcified cartilage, is immovably connected with the 

 backbone, and does not completely inclose the brain. 

 Neither cartilage bones nor membrane bones are de- 

 veloped. 



26,164 



THE DOMESTIC FOWL 



'y HE ANATOMY OF THE DOMESTIC FOWL 



as sh(jwn on a large scale b\ the Turkes, A/c/ea^ns 

 gallopavo, one of the largest of the Gallinaceous Birds. 

 Model, natural size, by Al'ZOL'.X, Pans. 



MODEL 



Showing structure of 



PRECIOUS COR.\L, Cora/Iium rubrum. 



GREATLY ENLARGED. 



1. A.\ial skeleton. 



2. Friable crust or Caenosarc, in which lie the tubes 

 connecting the body cavities of the individual 

 polyps. 



3 Individual polyps. 



.SsS 



Specimen forms of labels. 



