EXPLANATION OF PLATE 29 

 Fig. 1. Saxidomus(?) noblei, n. sp. X 1. 



Fig. 2. Crassatellites brainerdi, n. sp. X 1. This specimen is abundant but 

 poorly preserved at University of California Locality 2233 in the Martinez of 

 the Santa Ana Mountains. 



Fig. 3a. Molopopliorus( ?) howardi, n. sp. X 1. Mouth view. Type specimen 

 from the Martinez of Bock Creek. 



Fig. 3b. MolopopJiorus( ?) howardi, n. sp. X 1. Back view. 



Fig. 4. Cerithium butterwortlxi, n. sp. X 1. This species is from the Santa 

 Ana Mountains on a ridge one quarter mile west of the summit of the Santa Ana 

 Mountains on the headwaters of Sierra Canon. 



Fig. 5a. Natica pinyonensis, n.sp. X 1. Back view of type specimen. 



Fig. 56. Natica pinyonensis, n. sp. X 1. Mouth view of a second specimen. 



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