EXPLANATION OF PLATE 29 



All figures natural size. 



Fig. 1. Mulinia densa ta Conrad. San Pablo, Miocene. 



Fig. 2. Mulinia densata Conrad. San Pablo, Miocene. 



Fig. 3. Mulinia densata Conrad. San Pablo, Miocene. 



Note type of umbones as compared witb the figures above. 



[348] 



