402 E. C. CASE 



The bones of the limb are stout and short. The humerus is 

 very imperfect, only the lower portion being preserved, but it 

 indicates a very stout bone, and the lower end is strikingly simi- 

 lar to that of Eryops ; the head for the radius is very large and 

 is located almost entirely on the anterior side of the bone ; just 



posterior to it is a strong descending 

 process that reaches below the lower 

 / end of the bone. Fig. 7. There is a 

 distinct ectepicondylar process on the 

 -v, outer side of the bone. There is no 



entepicondylar foramen visible, but the 

 <^ """v ( bone is broken below where this should 



appear. The two other limb bones are 

 shown in Figs. 8 and 9. 

 / m '1 The caudal vertebrae differ markedly 



^f from the typical dorsals. The centra 



Fig. lO.-Caudal vertebra. ^^^ ^^ ^ ^^ ^^ ^ ^^^ ^^e neural 



from same specimen as thai . . i . , 



shown m Figs. 6-9. ^pi^e IS as high as the length of the 



centrum. The centrum is not broader 

 than long and is deeply amphicoelous. There are well-developed 

 anterior and posterior zygapophyses, but no trace of zygos- 

 phene or zygantrum. The lower side of the vertebrae is marked 

 by the exceptionally strong and elongated chevron bones ; 

 they are attached between two adjacent vertebrae, and there is a 

 strong face on the lower edge of the posterior surface of the pre- 

 ceding vertebra for the attachment of the head of the chevron. 

 The caudals with chevrons are shown in Fig. 10. 



MEASUREMENTS. 



Length of the longest limb bone ------- .106™ 



Width of the complete end ------- .065 



Length of the shortest limb bone ------- .087 



Width of its widest end _----.*- .047 



Width of its shortest end - - - - - - - - .036 



Length of three caudals -------- .061 



Height of the first from the base of centrum to top of spine - - .044 



Horizontal diameter of centrum of first - - - - - .012 



Vertical diameter of centrum of first ------ .019 



Length of a complete chevron ------- .031 



E. C. Case. 



State Normal School, 

 Milwaukee, Wis. 



