Darwi/ru 
Phil. Trans. 1 S 87 A.Platn 2 2. 
JDixrrfb-'beZl/ fijgvumy oF oxpujJjUorijuunnj. 
Secfiorv perperuLUyuZour to ococfs oF rotouttoro. 
[A-cUj -2-443; (3 —-j; P ~ 6 p^- 0434- j rnr-rnAnJxuru x ’48Zj 
F i g . 2 . 
D-vunJb - b eJOb figvure, of e/O^uJJFbr turns 
Seotvony through, clocLs of rvboutwru 
[A~oo, £ - 2’449 / B = j ; y^Ji T* ” 0494; TruOTwenkujn, ~ (fn) f h 5 x '4<92_7 
Pig, 3 . 
JSquxxZ- -tTbduss&s nearly ins oorotouct. 
Section, perperudarwJjxr to cuocts of rotojdjorv. 
[A-a,; &-2'646j (l-i; Y~jj $-038; rru> mcntiurv « ( jX)rb B x 472 ] 
Fig. 4. 
"West ^evraian. &. 0 ° Hfch. 
