PLATE 5. 
Fic. 1—Drawing of the third specimen of Humicrerpeton parvum 
Moodie. X4. (No. 4400, United States National Museum.) a, anus; 
f, femur; h, humerus; 2, interclavicle (?) clavicle; in, intestine; m, man- 
dible; 0, orbit; s, stomach; ¢, tibia and fibula. 
Fic. 2.—Drawing of the skeleton of Amphibamus thoracatus Moodie. 
X2. (No. 4306, United States National Museum.) , clavicle; h, 
humerus; 7, interclavicle; 0, orbit; 7, radius; v, vertebra. 
Fic. 3.—Cope’s drawing of the type specimen of Amphibamus grandi- 
ceps Cope. X1ca. (Geol. Survey Illinois, vol. 2, pl. 32.) 
