220 DR. J. MURIE ON THE ANATOMY [Feb. 14, 
mensions. The articulating facet for the second rib is on the under 
surface of the transverse process. In the third the neural spine is 
more blunted than in the second; the transverse process becomes 
flattened from above downwards, not before backwards as in the two 
first. The fourth dorsal has a broader truncated spine looking di- 
rectly upwards; its transverse process is completely flattened, but 
thick at the outer point for the attachment of the rib. The remainder 
of the dorsal vertebrz differ so little from each other as not to re- 
quire any special notice. 
The lumbar vertebree present few special differences from the dor- 
sal, only varying somewhat in the proportions of their several parts. 
The average thickness of the body in each is about 93 inches, but in 
the last five it is an inch more. The same might be said of their 
height, while their width is above 12 inches. The spinal canal is 
lessened in size towards the last. The neural spine slopes rather 
more backwards than in the dorsal, its truncated extremity is straight 
and looking directly upwards; but in the last one the truncation is 
more oblique, the posterior angle of the spine less inclined upwards, 
but more backwards and downwards. The metapophyses at first are 
subquadrate, and arise from the base of the neural lamine ; but in 
the more posterior vertebrae they become conical, are given off 
higher, and, instead of a direction forwards, rather come to point 
upwards. The transverse processes are very uniform, flat, thin, 
straight, and of nearly an equal breadth throughout. Their average 
length is 14 inches, diminishing to 12 inches in the five hinder ver- 
tebree ; and their breadth is at narrowest 5 inches, increasing out- 
wardly to 8 inches. 
Series of Measurements to illustrate the comparative Dimensions of 
the Lumbar Vertebre, in inches. 
o oc . n 5 n mn = 
02 se ols ne a 2 n n =| e 3 
GES |See a = 3 2 o | 3 he se : . 
seecleses |B./2 [s8les js |2 | sel eslsblaé 
Baie ta = eel ois 1] @ es] es ae 4 s aS ml Om 
Lumbar | © 822/232] 55/29|S3/S5|S os Soslediselse/fele8 
bre See ee ales| B3\o5| P2/Sees!25| SS) 52/25) Bslss 
vertebra.) S55 3/3429). 3) 20 /nu|ss/SS5/S5e/ 4S (So/Se)selea 
BooO} Ss al’ so|So/SoieealRe Sle" oal/gSimSiES 
PEEa Sess (|e IT BIFe Ae |e |} eel se al” 3 
Lal o 
ere jogsid |° |§ | #] B | 8 iA jaye | Bl ® 
2Qnd..| 414 25 |112) 8%] 921/143) 4% | 6% | 133) 62 | OF) 43 | 42 
4th ..| 42 25 |12 | 9 | 94/142) 5 8 13 | 6 93) 42 | 5 
6th ..| 40 26 | 123/10 4/14 | 52 | 8F 114 | 53/10 | 3% | 43 
8th ..| 39 25 1121) 9 | 92|14 | 52] 8 134] 63 4] 34 | 54 
2 d ie |.. 2 a | OF a| ¢ Fa 
10th ..| 38% | 252 |12%)10 | 9%) 122) 53 7% | 143] 6 91) 31 | 6 
12th ..| 36 242 1122) 103|10 | 123) 53 | 8 |14 | 6 9 | 2% | 52 
14th ..} 30 283 |13 | 103) 103 ae -- |14 | 63 | 9 | 33] 5 
The caudal vertebrae present are twenty-one in number. The 
three most anterior of these are chiefly distinguished from the last 
lumbar by the attachment of the chevron bones; but those behind 
by degrees alter in form till at length there remains only a small 
