Vascular System of Bdellostoma dombeyt. Aq 
FIGURE XVI.—A ventral view of the dorsal wall of the portal heart of 
Bdellostoma dombeyt, the ventral half having been cut away. (X2.) 
ap, anterior portal vein. supr. int, supra-intestinal vein. cp, com- 
mon portal vein. vv, valves. 
FIGURE XVII.— Diagram of the venous system of Ade/lostoma, dorsal 
view (approximately natural size). Portal system, green; general sys- 
tem blue. On the right side, the renal branches of the posterior cardinal 
are omitted. On the left side, the somatic branches are omitted. 
acr, acl, right and left anterior cardinals (or jugulars). ded, scd, deep 
and superficial branches of anterior cardinals. s, somatic veins. ph, 
pharyngeal branches. clb, ‘‘club-muscle’’ branches. jv, inferior jugu- 
lar vein. S, sinus venosus. pnl, pnr, left and right pronephros. pcc, 
posterior common cardinal. per, pel, right and left posterior cardinals. 
ha, hp, anterior and posterior hepatic veins. caud, caudal vein. ap, 
anterior portal vein. cp, common portal vein. gb, gall bladder. sub. 
int, sub-intestinal vein. gen, genital veins. 
FIGURE XVIII.— Diagram of entire circulatory system in 4de//ostoma 
lateral view (approximately natural size). Arterial system, red; general 
venous system, blue; portal system, green. 
Lettering same as Figs. XVII and XX. 
FIGURE XIX.— Lateral view of the viscera of the pharyngeal and 
cardiac regions, including ventral view of the right side of the body 
wall (1%). In this figure the viscera have been laid over upon the 
left side, in order to show the relation of the blood vessels to the body 
wall. As a result, the somatic branches of the anterior portal and 
dorsal aorta in the branchial region are stretched somewhat beyond 
their normal length. 
Aa, anterior dorsal aorta. Ap, posterior dorsal aorta. Car, right 
common carotid. pb, pharyngeal branches. ap, anterior portal vein. 
ic, intercostals. supr. int, supra-intestinal vein. cv, cystic vein. sub. 
int, sub-intestinal vein. pcr, right posterior cardinal... ef. br, efferent 
branchial vessels. clb, ‘‘ club-muscle’’ branches. 
Otherwise as previously. 
FIGURE XX.— Diagram of the arterial system of Adellostoma dombeyt 
dorsal view (approximately natural size). The afferent branchial system 
is omitted. Of the branches of the posterior dorsal aorta, on the right 
side, the renal branches are omitted. The genital branches should be 
represented on the right side. 
V, vertebralis impar. Ilbr, lateral branch. ext. car, int. car, external 
and internal carotid arteries. s, somatic arteries. Car, Cal, right and 
left common carotid arteries. ef. br, efferent branchials. con. v. con- 
necting vessels. coel, coeliac artery. caud, caudal artery. ren, renal 
branches. mes, mesenteric arteries. 
(o) 
On 
