No. 404.] 
TABLE II.! 
THE SACRUM IN NECTURUS. 
637 
No. oF SPECIMENS RECORDED BY 
CHARACTER AND POSITION 241 
oF SACRUM. PERE Juin. Pa SPECIMENS. 
Symmetrical. 
a ler. e o 4 IO IO 54 
ALIE 133.2...) 63 15 52 10 110 
ZEX 44... YN 2 2 
AXIS Le NS Y ms I I 
NOEL xs oe a 6 24. 7 41 
AEN i. i.e s 3 5 
eR |... 149 Eel I 
Asymmetrical. OP 
BR. XVIIL L. XIX —22. ..... I 2 5 
R. XIX, L. XVII —22...... 4 
BOXIX,L. XX gg ee es s P ge 
RSX, L XIX ig 492-5 I 7 A 10 : 
R XX, L. XIX —234 ......- ; 
Ri SRT EAM eee I Ix dee I 
R. XVIII, L. XVIII, XIX —22. . 
R: XIX, XX, L. XIX —23. ... f" 2 
R i 2? 
MIX, E. XIX, XX sss 
with the sacral ribs and ilia from the dorsalside. The dotted 
lines indicate the outlines of the cartilage and other tissue 
forming the articulations between the ilia and sacral ribs, as 
! The Arabic numerals are used to designate the vertebra bearing the first 
hemal arch. 
? The position of the first haemal arch of this specimen is not recorded. 
3 The position of the first hæmal arch in one of these specimens is unknown. 
