j 922] Kellogg: Pinnipeds from Miocene and Pleistocene Deposits 45 



sharply defined. The external facet is less protruding and more nearly 

 vertical. Transverse width of the shaft is of nearly equal dimensions 

 throughout entire length. There is some similarity in the develop- 

 ment of the base of this metatarsal with that of those referred to 

 Allodesmus. The articular surface is strongly convex, terminating 

 anteriorly on the dorsal face but not quite reaching the plantar face 

 posteriorly. The head of the metatarsal is rounded, but tibular and 

 fibular tubercles are ill defined, if present. There is a noticeable 

 median depression on the dorsal face of the shaft near base, with 

 rugose area on either side, possibly for insertion of muscles. 



PHOCA, sp. A 



On January 20, 1917, B. L. Cunningham, of the geological staff 

 of the Southern Pacific Railway Company, collected several frag- 

 ments of a mandible together with a premolar and a molar. The 

 molar is in place on a fragment and the premolar is loose. These, 

 according to the label, were found near the ' ' N.W. end of Tejon Hills, 

 between Comanche and Tejon Creeks, in unsurveyed N.E. y± Sec. 23, 

 Range 29 East, M.D.M. In Santa Margarita white clayey sands 100 

 feet below Chanac Formation. Ostrea titan and Pecten crassicardo 

 etc. occur in a bed stratigraphically but a short distance below this 

 horizon. " 



These pieces of the mandible are so small and fragmentary that 

 accurate comparison with any known phocid is impossible. On the 

 whole the mandible was heavier than that of aii3 r of the existing 

 members of the genus Phoea, and the dimensions were probably 

 slightly larger. The transverse diameter of the horizontal ramus was 

 greater than that of any of the recent species of Phoca. An inferior 

 dental canal was present and traversed the ramus in approximately 

 the same position as it does in the latter. The anterior and posterior 

 portions of both premolar and molar are broken away. The molar has 

 two roots and the premolar has but one. The teeth differ from those 

 of any Phocidae that have been available for comparison and resemble 

 rather those of Allodesmus. 



PHOCA, sp. B 



In August of 1911 Professor T. D. A. Cockerell collected the ulna 

 (figs. 19a, 19&) which is described below, in what was presumably the 

 lower level of the Upper San Pedro beds near La Jolla, California. 

 The label accompanying this ulna bears the following data: "In shell 



