232 Scientific Proceedings, Royal Dublin Societi/. 



Table I. — Measurements of 



Ightham 

 Fossil. 



o 



1. Basal length, . . 



2. Extreme length, 



3. Zygomatic breadth, ,. 



4. Width of hraiucase midway between ear and zygoma, 



5. Distance between anterior border of foramen magnum 



and plane of posterior edges of ra. 3. 



6. Least -width of frontals behind superciliary processes, 



7. Extreme width of frontals across superciliary pro- 



cesses. 



8. Width of nasals at point Avhere frontal, nasal, and 



premaxillary come in contact. 



9. "Vertical diameter of malar, .. 



10. Length of Diasteme, . . 



11. Alveolar length of molar series, 



12. Width between inner edges of ra. 3, . . 



13. Width between inner edges of p. 3, 



14. Width between outer edges of alveolar walls between 

 m. 1 and p. 1, 



S3 



103-2 

 50-6 

 35-1 

 32-2 

 16-5 

 37-5 

 20-3 

 10-0 

 29-6 

 19-1 

 17-4 

 H-7 

 29-0 



85-8 

 103-8 



i. var. hibernicm. 

 British Museum. 



Wc 



41-6 

 Ca 



28-2 

 19-9 

 18-3 

 14-8 

 29-5 



33-3 

 22-8 

 10-0 

 32-3 

 19-5 



79-1 



98-5 



48-2 



33-4 



29-8 



13-9 



34 

 Ca 



21-0 

 7-S 

 28-0 

 18-6 

 16-0 

 13-4 

 27-5 



76-6 

 95-0 

 45-8 

 32-4 

 29-0 

 16-5 

 32-6 

 20-8 

 9-7 

 20-0 

 18-4 

 16-4 

 12-0 

 28-4 



tii-l 



75-9 

 94-0 

 45-7 

 32-1 

 28-8 

 15-2 

 33-3 

 18-6 

 8-7 

 27-0 

 18-1 

 15-9 

 13-3 

 26-9 



74-4 

 92-0 

 45-1 

 33-0 

 29-0 

 16-6 



18-5 

 8-0 

 25-0 

 17-5 

 15-6 

 12-8 



72-0 



89-3 

 45-4 



31-" 

 27-9 

 17-8 

 33-1 



24-7 

 17-6 



15-1 ; 



12-1 

 26-0 



