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Show 1899.] FROM THE LONDON CLAY OF SHEPPEY. 777 and on the exposed (right) side the postorbital and zygomatic processes, together with the outer half of the quadrate, are much abraded. Fig. 1. Skull of Prophacthon shrubsolei, from above. Natural size. cb.p., cerebellar prominence; j., jugal; l.s., surface for articulation with lachrymal; »., external nares ; n.g., narial groove ; r.h., rostral hinge ; sq., squamosal; tf., temporal fossa ; p.o.p., postorbital process. The occipital surface (Plate LI. fig. 2) of the skull is wider than it is high. The sessile occipital coudyle (oc.c.) is nearly |