76 



SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE 



VOL. 35 



The type of structure is first. The bone substance is lamellated, the lacuna) 

 are round, oval or long, and the canaliculi are bushy, short, or long-. In some 

 of the large bats of the Pteropus genus, Haversian canals of the (la) differ- 

 entiation are present. 



Detailed Examination 



eight femur of mobmoops. no. 102231, u. s. nat. mus. 



Pl. 8, Fig. 113. Syn. Tab. IV 



Antero-posterior diameter of bone, 1 mm. ; lateral, 0.8 mm. 

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

 The medullary canal is full. Medullary index, 59%. 



Structure. — The section is composed of concentric lamella) with oval lacunae 

 and bushy canaliculi surrounding the medullary canal. The bone is uniform. 

 Type I. 



BIGHT FEMUR OF EHINOLOPHUS MEHELYI. NO. 84768, U. S. NAT. MUS. 



Pl. 8. Fig. 114. Syn. Tab. IV 



Antero-posterior diameter of bone, 0.8 mm. ; lateral, 0.8 mm. 

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

 The medullary canal is full. Medullary index, 64%. 



Structure. — The section is composed of concentric lamellae with oval lacuna) 

 and bushy canaliculi surrounding the medullary canal. The bone is uniform. 

 Type I. 



LEFT FEMUR OF STUBNIRA LILIUM. NO. 115053, U. S. NAT. MUS. 



Pl. 8, Fig. 115. Syn. Tab. IV 



Antero-posterior diameter of bone, 1 mm. ; lateral, 0.9 mm. 

 Antero-posterior diameter of medullary canal, 0.5 mm. ; lateral, 0.4 mm. 

 The medullary canal is full. Medullary index, 29%. 



Structure. — The section is composed of concentric lamellae with long, nar- 

 row lacunae and long, straight canaliculi surrounding the medullary canal. The 

 bone is uniform. 



Type I. 



BIGHT FEMUB OF LONCHOBHINA. NO. 173849, U. S. NAT. MUS. 



Pl. 8, Fig. 116. Syn. Tab. IV 



Antero-posterior diameter of bone, 0.9 mm. ; lateral, 0.8 mm. 

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

 The medullary canal is full. Medullary index, 55%. 



