On the Blood-Vascular System of the Earthworm 
Pheretima, and the Course of the Circu- 
lation in Earthworms. 
By 
d 
Karm Narayan Bahl, D.Se., 
Of the Muir Central College, Allahabad, India. 
(From the Department of Comparative Anatomy. Oxford.) 
With 11 Text-figures. 
TABLE OF CONTENTS. 
PAG 
1, INTRODUCTORY : : F ; , ; : : “i spd 
2, THe TypicAL ARRANGEMENT OF THE BLOOD-SYSTEM IN THE 
INTESTINAL REGION OF THE BoDY BEHIND THE Four- 
TEENTH SEGMENT . : ; F : : , 5 IBY 
(a) The Longitudinal Trunks F : : : ‘ SDE 
(6) The Intestinal Blood-plexus . 3857 
(c) The Commissural, Integumentary, and Nephitidial Wecel: Reiss 
(d) The Dorso- and Ventro-intestinals . : : ‘ . 368 
3. THE BtLoop-systeM IN THE First FouRTEEN CEPHALIZED 
SEGMENTS. ‘ : ‘ : ; - BH 
(a) The Sign ee Truriks : ' : ‘ ; -f 210 
(6) The * Hearts’ and the Anterior Loops —. ‘ 5 GR 
(c) The Blood-vessels of the Oesophagus and Phasyax ‘ oS 
4. COMPARISON OF THE BLOOD-SYSTEM OF PHERETIMA WITH 
THAT OF LUMBRICUS AND ALLOLOBOPHORA . a Phe: 
5. THe VALVES IN THE BLOOD-VESSELS AND THE COURSE OF 'THE 
CIRCULATION OF THE BLOOD ; , : : . 380 
6. SUMMARY : : . ; ; ; : : ‘ . 391 
7. List or RevERENCES . : 3 ? ; : . dy) BOR 
