266 THO.MAS DWKJIIT ON 



Length of 110. Lcnutli, male average. Fropoi-tions of 110. Average proportions. 



Neck 12.7 cm. ]-J.7cm. 13.3 cm. li).-J'/o 19.5% 21.5% 



Back 31.7 28.6 28.7 48.8 44.0 46.3 



Loins 20.6 23.7 19.9 31.7 36.5 32.2 



65.0 65.0 61.9 lOD.O lOo.O 100.0 



There is a general .similarity in (lioup A. The most peculiar specimen is that of a 

 nulimcntary lirst rih. The lM)uii(larics ol iIk' thoracic reji'ion sliow a good ileal of varia- 

 tion, sometimes heing clear cut and al oliicrs transitional. Sometimes the 1st ribs en- 

 croach on the 7th vertehi'a. The hnnhar i-euion may, exceptionally, he practically t3'pical. 



Group B. 

 The spines in this group liave the ad(htional praesacral vertebra in the lumbar region. 



493. Cat. 9379-18. 



Male, white, aet. 37. C. 7, T. 12, L. 6, S. 5. (C. 4 ? ) . 



The first ribs are large, as is also the 12th pair, which seems to occur in spines of this 

 group as well as in those of the preceding. The right 12th measures along the cvirve 15. 

 cm., and on the left 13.-3 cm. The 2()th vertebra has pretty nearly normal transverse 

 processes. The change of the articular processes is, perhaps, a little transitional above the 

 19th, but t\ pical below it. The spinous process of the 2()th vertebra is thoracic rather 

 tlian luml)ar. The spread of the lumbar transverse processes increases to the 4th (23d), 

 but the}' are all abont eciual. Those of the 24th and 2oth ai-c tolerably typical of the 

 last two vertebrae. The sacrum is very normal except that the lateral masses rise, 

 perhaps, a little too much. The auricular surfaces pro])ably touch the 3d piece. There 

 is no confiKjata vera. The coccyx consists probably of foiu- vertebrae, so fused together 

 that the number is uncertain, but it can hardly be smaller. 



Y. Cat. 9379-19. 



Identity unknown. Male almost certainly. C. 7, T. 12. L. 6, S. o, (C. 3 at least). 



A very pretty spine. The 12th ribs are cut. but are probably longer than usual. 

 The 20tli vertebra has on the left a small transverse process, the natui-e of w Inch is un- 

 questionable. On the right a free process of about the same length ( 1.7 cm.) . but broader, 

 arises from a corresponchng place at the junction of the pechcle and the lamina, clearly 



