BLAKE — ON THE CEANIA OF ANCIENT RACES. 



219 



has told us " the coins loere under very little cover, and might have 

 been imbedded very recently." The exact depth is, however, 

 unrecorded. 



The large flat plate, from (I presume) the bed of the vratercourse, 

 in the Heathery Burn Cave, is a most interesting relic. Although 

 unquestionably modern, it is covered to the depth of \ inch with a 

 thick deposit of fish-bones, of which the centra, neural arches, and 

 haemal arches of the vertebrae can be observed, and amongst which 

 some bones, possibly those of small frogs or tadpoles, may be 

 detected. All these are in a very friable state. 



Eteuria. — In the osteological department of the British Museum 

 are four skulls, of presumed high historical antiquity, which were 

 derived from caves in Etruria. I give the following table of their 

 measurements, taken in the same way as I have measured the East 

 Ham skull. This table is necessarily defective, as in the skulls 

 marked I. M. N. and +, the apical extremities of the mastoid 

 processes are broken away, and the horizontal periphery of the 

 skull mai'ked + cannot be computed exactly, by reason of the left 

 squamosal having posthumously bulged out from the parietals. 







3 



(3 



a 





o ^ 



§ 



Measurements. 



■zo 



u 



lackwi 



truria 

 M.M. 





<» 



u 



o 



^ o 

 >-,•'-> 



S 









» 













Longitudinal diameter 



61 



7i 



7 



74 



74 



n 



74 



Parietal diameter 



51 



5| 



H 



5i 



H 



5 



5 



Frontal diameter 



5 



4^ 



44 



44 





4i 



4-5- 



^8 



Vertical diameter 



41 



5f 



41 



5 





5f 



5 



Interraastoid arch 



141 



14i 



14f 



144 





144 



144 



Intermastoid line 



4f 



44 



4 



44 





4 



H 







144 



144 



144 



15f 



14 







21i 



20f 



20 



204 



21 



20 



20f 



Proportion of breadth to length, the 

















latter being estimated as 10 



8-518 



8-103 



7-321 



7 



7 



6-879 



6-666 



In I. M. M. and I. M. N. the occiput is globular, and shelving 

 gently downwards. In + it is full and oval, the lower half of the 

 supraoccipital being flattened. No undue prominence of the supra- 

 orbital ridge, or of the paroccipital tubercles, is observable. Small 

 ossa wormiana are present in the lambdoid suture of 1. M, M., but 

 in I. M. N. the sutures are obliterated ; nor does + exhibit any 

 peculiarity in this respect. The frontal suture, however, in I. M. M. 

 is present. The inion is distinctly marked in I. M. M. and in + ; 

 not so, however, in I. M. N. In all three skulls the alisphenoid and 

 parietal join. A slight depression of the vertex is indicated behind 

 the coronal suture in the three skulls, and especially in I. M. M. 

 Iso history of the specimens has been preserved, nor is there any 

 geological or antiquarian evidence demonstrating their antiquity. 



