462 



Bashford Dean Memorial Volume 



Text-figure 105. 

 Semidiagrammatic figure of heart and anterior blood vessels (anomalous?) of a specimen of Chlamydosel' 



achus viewed from the left side. 



a., auricle (atrium); a.i., anterior innominate artery; an., anastomotic branch of first efferent branchial artery; h.a., bulbus arteriosus; 

 br., brachial vein; c, cranial aorta; c. a., conus arteriosus; c.c, anterior carotid commissure; coe.mes., coeUaco-mesenteric artery; cor., 

 coronary artery (plus hypobranchial trunk); c.s., cardinal sinus; c.v., cardinal vein; d.a., dorsal aorta (posterior to \.); e.c, external 

 carotid artery; h.v., hepatic vein; hy., hypophysis; ic., internal carotid artery; i.c.f., internal carotid foramen; i.j.v., internal jugular 

 vein; 1^., cephalic aorta; m.s., arteriae musculo-spinales; p.c.s., precaval sinus; fi.p!., pituitary plexus; scl, subclavian artery; s.j.v., 

 superior jugular vein; sp., spiracle; s.r., sinus venosus; tT., tropeic (lateral abdominal) vein; v., ventricle; v.a., ventral aorta; I-III, 

 first to third pairs of aortic roots (arches); 1-6, first to sixth pairs of efferent branchial arteries; 1 !-6 !, first to sixth pairs of afferent 



branchial arteries. 

 After Ayers, 1889, Fig. 2. 



Text'figure 106. 

 Efferent branchial vessels and dorsal aorta (anomalous?) of a specimen of Chlamydoselachus. 



an., anastomotic branch of first efferent branchial artery; c, cranial aorta; coe.mes., coehaco-mesenteric artery; d., dorsal aorta (posterior 



to \.); e.c, external carotid artery; h., hyoid arch; i.e., internal carotid artery; i.c.f., internal carotid foramen; \., cephaHc aorta; m.s., 



arteriae musculo-spinales; p.ph, pituitary plexus; sch, subclavian artery; sp., spiracle. I-IX, first to ninth pairs of aortic roots (arches); 



1-6, first to sixth pairs of efferent branchial arteries; lv-5v, first to fifth branchial arches. 



After Ayers, 1889, Fig. 1. 



