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University of California Publications in Geology [Vol. 10 



PROSTHENNOPS, sp. 

 A number of fragments (no. 22459) from the Chanac formation 

 represent a large peccary in which the cusps of the cheek-teeth are 

 low or blunt-conical as in Prosthennops. This species approaches cer- 

 tain of the imperfectly known peccary forms from Pliocene faunas of 

 the Pacific Coast and Great Basin regions. The material available 



Figs. 16 to 21. Merycodus near necatus Leidy. All figures natural size. 

 Chanac formation, southern end of San Joaquin Valley, California. Specimens 

 represented in figs. 19 and 20 collected by E. W. Pack of U. S. Geol. Survey. 



Fig. 16. or M'j, occlusal and outer views, no. 22366 ; fig. 17, flattened 



superior portion of beam, no. 22332; fig. 18, terminal portion of horn, no. 22367; 

 fig. 19, distal end of metatarsus, anterior side ; fig. 20, proximal phalanx, lateral 

 and superior views; fig. 21, second phalanx, lateral and superior views, no. 22460. 



