NO. O COMPARATIVE HISTUI.OGV OF J'KMUR KOOTE 93 



KIGHT FEMIIH OF iMACHOI'lS. WALLABY. NO. 22810, AMEE. MI'S. NAT. HIST. 



Pl. 9, Fi(i. IM. Syn-. 'J'\ii. V 



Antero-posterioi- diameter of l)oiie. 14 iiiiii.; lateral, 1-1- iiuii. 



Antero-posterior diameter of inediillary ramil, 1(» mm.; lateral, VU.5 mm. 



The medullary eaiial is full. Medullary index, 115%. 



Structure. — The section is composed of lamella' with oval long lacuuiu 

 and straight canaliculi, interrupted in the posterior wall by vascular canals and 

 crude Haversian systems, and elsewhere by frequent radiating canals and 

 Haversian systems of the (la) differentiation. It is indistimitly laminated. 



Type I-III, la. 



LEFT FEMLTR OF SOLENODOX PAKADOXfS (yOUXG). AMEB. MUS. NAT. HIST. 



Pl. 9, Fig. 175. Syn. Tab. V 



Antero-posterior diameter of bone, 5 mm. ; lateral, 4.5 mm. 



Antero-posterior diameter of medullary canal, 4 mm.; lateral, ."t.n mm. 



The medullary canal is full. Medullary index, 165%. 



Structure. — The section is composed of lamellse with round and oval lacuna^ 

 and bushy canaliculi, frequently interrupted Ijy Haversian systems of tlie (la) 

 and (lb) dift'erentiation and crossed by many obli(|ue and radiating canals 

 which take their origin in the medullary canal. The bone sliows a very incom- 

 plete differentiation. 



Type I-lII, la, lb. 



RIGHT FEMLTK OF SOLE.VODOX I'A [iADdXlS (ADI'LT). AMER. MI'S. NAT. HIST. 



Pl. 9, Fig. lU!. Syn. Tab. Y 



Antero-posterior diameter of bone, 6.5 mm; lateral, 5 mm. 



Antero-posterior diaiueter of medullary canal, 4.5 mm.; lateral, o.5 mm. 



The medullary canal is full. Medullary index, 94 '/i. 



Structure. — The section shows the three divisions. The external circum- 

 ferential lamellje form a distinct ring around the section. It is widest in the 

 inner wall. The lacume are long and the caualiculi are bushy and straight. The 

 central ring is composed of lamella' with oval lacnn;c and bushy canaliculi, 

 interrupted by crude Haversian systems of the (la) and (lb) dift'erentiations. 

 The section is nearly all lamella'. The internal circumferential lamella? form a 

 fragTnentary ring around the medullary canal. Their lacuna? are oval and 

 straight and the canaliculi are straight. 



Type I-III, la, lb. 



