PLATE 8. 
Figs. 1 AND 2.—The two halves of the nodule containing the vertebrz 
of Spondylerpeton spinatum Moodie. X1. (No. 793, Yale Museum.) 
Fic. 3—The arm elements of Hrpetobrachium mazonensis Moodie. 
X1. (No. 799, Yale Museum.) h, humerus; 7, radius; s, scapula; w, ulna. 
Fig. 4.—The skeleton of Mazonerpeton costatum Moodie. X1. (No. 
800, Yale Museum.) 
