Vol. 70.] AND ASSOCIATED MAMMALIAN REMAINS. 87 



is obviously broken at tbis angle. The following are some 

 measurements (in millimetres) : — 



Width of naturally apposed nasals at the upper end 13 



Width of naturally apposed nasals at the lower end (about) ... 15 



Length of the median suture 14 



Maximum length of the nasals- 18 



Length of the upper border of the left nasal 7 



Do. do. do. right nasal 10 



Do. lower do. left nasal 10 



Do. do. do. right nasal (about) 11 



Comparison proves that these nasal bones resemble those of 

 the existing Melanesian and African races, rather than those of the 

 Eurasian type. 



The remains of a turbinal found beneath the nasal bones 

 are too much crushed and too fragmentary for description ; but 

 it may be noted that the spongy bone is unusually thick, and has 

 split longitudinally into a series of long and narrow strips. 



The remarkable new canine tooth (PL XV, figs. 2a-2e) is 

 certainly that of a Primate Mammal, and may therefore be referred 

 without hesitation to Eoanthropus. As it belongs to the right 

 side of the mandible, corresponds in size with the jaw already found 

 at the same spot, and agrees with the molar teeth in having been 

 considerably worn by mastication, it may almost certainly be 

 regarded as part of the specimen previously described. No trace 

 of the socket for the tooth is seen in the bone preserved at the 

 svmphysial end of the fragmentary mandible, but its position can 

 be determined approximately by reference to the corresponding 

 tooth in the Apes. 



The crown of the tooth is conical in shape, but much laterally 

 compressed, so that its inner (lingual) face is concave, while its 

 outer (labial) face is only gently convex. The extreme apex is 

 missing, but whether by wear or by accidental fracture cannot be 

 decided. In the upper half of the outer face (PI. XV, fig. 2 a) 

 the thin layer of enamel is shown, marked by the usual faint 

 transverse stria tions (or imbrications) ; but below this the tooth 

 is encrusted with a film of hydrated oxide of iron, which has broken 

 away at the base of the crown, removing the enamel with it. The 

 darkly- stained dentine is thus exposed here, and the only mark of 

 the lower limit of the crown is a faintty-impressed transverse line 

 just above the constricted neck of the tooth. The enamel on the 

 inner face of the crown (PI. XV, fig. 2 b) has been completely 

 removed by mastication, while that of the outer face, showing its 

 prismatic structure, is exposed in worn section along the edges of 

 the apical portion. The surface of wear forms a simple gently- 

 curved concavity, evidently produced by a single opposing tooth ; 

 and it extends to the basal edge of the crown, as indicated by 

 the clear ending of the cement along its lower margin. It is 

 probably almost parallel with the original inner face of the crown, 

 and the wear has been sufficient near the apex to expose the 

 secondary dentine at the upper end of the pulp-cavity. The 



