CONTENTS 
PAGE OF PAGE OF 
ee THIS THIS 
. VOLUME. ARTICLE. 
Introductory Remarks. 0 gaimom-sncteiaegs ira chee 13 I 
FRC Ar sc) claret ace ata Re ates Ce eee emi Be oat, 13 I 
Pericardial Cavity) in sce Bea eyo Deer = 16 4 
Agterial System; cay or 3 jo lb.) eee ik ISA fa Soh eets 20 8 
Branchialacurcrillat1o tiem case ee acs: omen een 21 9 
GeneralvArterial:Systent, is) a Ps Se) 24 12 
Generale Ven oltsss yScte thers yt rei ennai a 28 16 
Portals Venous SySteltine. is eck es) ae “ENO - 33 21 
Remarks on Comparative Anatomy of Bdellostoma, 35 23 
Primitive Characters in the Blood-Vascular System 
OL BACLOSTOMEGISE PR on ae ne ee 43 31 
Characters Secondanly Acguired,. (3). 2-2. 272 43 31 
Explanation of Lettering used in Figures, .. . . 44 32 
Hxplatationlof lates satus SE se ees 45 33 
