NO. 3 COMPARATIVE HISTOLOGY OF FEMUK FOOTE 53 



BIGHT FEMUK OF SCELOPORUS OCCIDENTALIS. N'O. I 74 3, f. S. XAT. MUS. 



Pl. 4, Fig. 53. Syn. Tab. II 



Antero-posterior diameter of bone, 1.5 mm. ; lateral, 1 mm. 



Antero-posterior diameter of medullary eaiial, 0.6 mm. ; lateral, 0.5 mm. 



The mednllaiy eanal is full, ^fednllary index, 24%. 



Structure. — The seftion is eomi^osed of lamelte with oval and long lacunae 

 and straight canalieuli surrounding tlie medullaiy canal. There is no dif- 

 ferentiation of structure. 



Type I. 



right FEMUK OF SCELOPORUS MAGISTER. NO. .1 71 2, U. S. X.AT. MUS. 



Pl. 4, Fig. 54. Syx. Tab. IT 



Antero-posterior diameter of bone, 1.5 mm. ; lateral, 1 mm. 



Antero-posterior diameter of medullary canal, 0.5 mm. ; lateral, 0.5 mm. 



The medullary canal is full. Medullary index, 19%-. 



Structure. — The section is composed of concentric lamelliP with oval lacuna; 

 and bushy canalieuli surrounding the medullary canal. There is no dii¥erentia- 

 tion of structure. 



Type I. 



RIGHT FEMUR OF CYCLURA CARINATA. U. S. XAT. MUS. 



Pl. 4, Fin. 53. Syx. Tab. II 



Antero-posterior diameter of bone, 5 mm. ; lateral, 5 mm. 



Antero-posterior diameter of medullary canal, 3 mm. ; lateral, 3 mm. 



The medullary canal is full. Medullary index, 56%. 



Stmctitre. — The section is composed of concentric lamellse with oval lacunae 

 and straight canalieuli surrounding the medullary canal. There is very little 

 differentiation of structure. The section is uniform. 



Type I. 



RIGHT FEMUR OF AXIOMS CRISTATELLUS. NO. L 15 13, U. S. XAT. MUS. 



Pl. 4, Fig. 56. Syx. Tab. II 



Antero-posterior diameter of bone, 1 mm.; lateral, 1 niuL 



Antero-posterior diameter of medullary eanal, 0.5 mm.; lateral, 0.5 mm. 



The medullary canal is full. Medullary index, 33%. 



Structure. — The section is composed of two rings of laniell*, external and 

 internal. The external lias long lacuna" with straight canalieuli and the internal, 

 oval and round lacuna" with bushy canalieuli. They are of nearly equal width. 

 There is very little differentiation of structure. The section shows the twofold 

 division. 



Type I. 



