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595 



animal.-. 'I In VOW N in tin :nin of the .-lulli :m- .-* r.-|H..s. 1 that tin- animal can remain 

 .-u.-jx-ndfd ]py it lor Ion;; periods, and a similar arrangement is noted in tiir li-^- of liirds. 

 Mi<-h us the swan. goose, A<v, whii-li .-Mud tor a long tiinc. Anmud the Horse's foot the 

 artt-rir-i Imuk u|> into niiiiifioii.-. ili vi-i<.i:s. and we know tlntt tliis aiiim-il c-uii n-main 

 in a .-tamlinir attitudi- for iiiontlis, and cvi n \ i ar--. Tin- nt> <>j:litlinliiii>-niii of birds is 

 arr.niir.d hki tin- r, t> ///<;'.//.. The same object is sometimes attained by great tor- 

 tno>it\ , as \\. liavi- idn-ady soen iii tlif description of several of the arteries. Perhaps 

 tin- nn'.-t iiiarkfd ( \ani|>lr. lio\\rver. is to he found in the carotid artery of the Seal, 

 \shi'li is nearly forty tiin.'s lon^.T tlum the space it has to traverse.) 



COMPARISON OF THE CAROTID ARTERIES Of MAN WITH THOSE OF ANIMALS. 



Tlir rti.'ituKHi riirntiil* of ^lan have a separate origin, the right arising from the 

 art'-ria innnminatn. the l'ft from the arch of the aorta. At the inferior border of the 

 tliMoid i-artila.L'f. tlii-y terminate l>y only two branches: the external and internal 

 ramtids ; the occipital artery is but a division of the former. 



ARTKRIKS OK TIIK FACK AM- III AI> OK MAS. 



1, Common carotid: -'. InN-rn r '!, Kxternal carotid; 4. 4. 



artery: .'.. Sti|M-ri<.r thvn.i.l artery : tj, Tnipozius; 1. Lingual artry ; 8, Sterno- 

 mastoid : '.'. r'...-i.d artery: 1", T.-ni|K.ral artery, dividius; into antriiir and 

 rior ln-alicii.-^ ; 11. Sul.in.'iital bralirh ; U, Trau.-vt-r'-i' t'.icial 



11. li ; l.\ Inferior coronary, and, 17, Su]>erior coronary branch ; 

 branch; Jl. Angular l.ranch. 



KRSAL CAROTID A RTERT. Contrary to what is ODsen-Kl in animals, th> intornal 

 carotid is a little lar-rer than the external, a difference whfch is explained in Man by 



2 Q 2 



