82 SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE VOL. 35 



EIGHT FEMUK OF PLECOTUS AUEITUS. NO. 152597, V. S. NAT. MUS. 



Pl. 8. Fig. 137. Syn. Tab. IV 



Autero-posterior diameter of boue, 0.8 mm. ; lateral, 0.7 mm. 

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

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



Structure. — The section is composed of concentric lamella? with oval lacuna.' 

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

 Type I. 



LEFT FEMUE OF NYCTICEIUS HUMEBALIS. NO. 115141, V. S. NAT. MUS. 



Pl. 8. Fig. 138. Syn. Tab. IV 



Antero-posterior diameter of boue, 0.8 mm. ; lateral, 0.7 mm. 



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



The medullary canal is full. Medullary index, 116%. 



Structure. — The section is composed of a few concentric lamellas with oval 

 laeunse and strai.ijlit canaliculi surrounding the medullary canal. The bone is 

 uniform. 



Type I. 



EIGHT FEMUE OF MYOTIS MYOTIS. NO. 86500, U. S. NAT. MUS. 



Pl. 8, Fig. 139. Syn. Tab. IV 



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

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

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



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

 and straight canaliculi surrounding the medullary canah The bone is uniform. 

 Type I. 



LEFT FEMUR OF EPTESICUS BAHAMENSIS. NO. 121929, V. S. NAT. MUS. 



Pl. 8. Fig. 140. Syn. Tab. IV 



Antero-posterior diameter of bone, 0.8 nun. ; lateral, 0.7 mm. 

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

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



Structure. — The section is composed of concentric lamellfe with oval lacunas 

 and straight canaliculi surrounding the medullary canal. The boue is uniform. 

 Type I. 



