92 DR. A. SMITH WOODWARD : THE PILTDOWX SKULL [April I914, 



The Associated Mammalia. 



STEGODO]V. 



The new fragment of a molar of Stegodon is part of an unworn 

 plate showing three cusps in line, the outermost being smaller and 

 much less elevated than the two others. It evidently belongs to 

 the hinder end of a molar, and it may perhaps be part of the same 

 specimen as the fragments already described. 



Khln-ocebos. (PL XIV, figs. 3 a & 3 b.) 



Rhinoceros is represented only by the anterior crest of an upper 

 cheek-tooth, which has been broken and rolled before burial, and is 

 as highly mineralized as the pieces of molars of Stegodon and 

 Mastodon. This specimen has, therefore, the appearance of a 

 derived fossil. As shown in anterior view (fig. 3 a) the crown 

 is rather low, and as seen from above (fig. 3 b) the inner expansion 

 of the crest is very wide at the base. The basal cingulum is pre- 

 served only on the anterior face, and does not appear to have 

 extended round the inner end of the crest. The enamel of the 

 inner expansion is almost smooth, but that on the sides of the thin 

 part of the crest is marked by a coarse rugosity and a few vertical 

 corrugations. The specimen cannot be specifically determined with 

 certainty ; but, on direct comparison, it is found to agree best with 

 the anterior crest of upper premolar 3 of Rhinoceros mercki 

 (= Rh. leptorhinus Owen) and Rh. etruscus. So far as general 

 shape is concerned, it might belong to either of these species ; 

 but, as pointed out to me by Prof. Boyd Dawkins, the peculiar 

 coarse rugosity of the enamel is most closely similar to that of 

 Rhinoceros etruscus. 



Castor. 



4 



A fragment of the alveolar portion of the inner face of the 

 nght mandibular ramus of Castor corresponds in size with the true 

 molar described last year. 1 This tooth, in fact, fits well the socket 

 for m. 2. The newly discovered lower incisor may also, perhaps, 

 belong to the same mandible. 



EXPLANATION OF PLATES XIV AND XV. 



Plate XIV. 



Pig. 1. Flaked flint, showing few flakings on one face (la), a simple flake on 

 the other face (1 b), and its tabular shape in edge-view (1 c). Natural 

 size. (See p. 84.) 



2. ' Eolith,' showing flaked edge (2 a), simply-flaked face (2 b), and edge- 



view (2c). Two -thirds of the natural size. (See p. 85.) 



3. Rhinoceros cf. etruscus Falconer : imperfect anterior crest of right 



upper premolar 3, front view (3 a) and inner view (3 b). Natural 

 size. (See p. 92.) 



2 Q.J.G.S. vol. lxix (1913) p. 143 & pi. xxi, fig. 7. 



