CASE 



PLATE 4 



Buettneria perfecta, ventral surfaces of posterior halves of interclavicles. 

 A. No. 7367, U. of Mich. X0.34. B. No. 7366, U. of Mich. X0.48. 

 C. No. 7364, U. of Mich. X0.53. 



