Australian Earthivorms. 83 



EXPLANATION OF PLATES XIY.-XVIL 



Figs. 1-19 — Side views of cephalic blood vessels of the earth- 

 worms named. 



,, la, 2a — Dorsal views of those of C. gijyi^slandicus and 

 Meyascolex yoonmurk, to sliow the double vessel. 



„ 20--Blood supply in one segment in the region of the 



hearts in C. gijJpslandicus, constructed from serial 

 sections. 



„ 21 — High power of a valve of ventral vessel of F. 



unions. 



„ 22 — Compiled low power drawing of a transversa 



section of the blood vessels of one segment in the 

 heart region of F. nnicns. 



,, 22a — Low power of horizontal section of the supra- 



intestinal vessel and hearts in F. amicus. 



^, 22b — Lower power of horizontal section of dorsal vessel 

 in /'. unions, showing connection with heart. 



^, 23 — Blood supply in one segment in the region of the 



hearts in F. unions, constructed from serial 

 sections. 



^, 24 — Blood supply in one segment in the regions of the 



hearts in P. fielderi, constructed from serial 

 sections. 



A — Diagram of longitudinal arrangement of vessels in 

 anterior part of earthworm. 



B — Diagram of vessels in transverse section in region 

 anterior to hearts. 



C — Diagram of vessels in transverse section in region 

 of hearts, showing two subintestinals. 



D — Diagram of vessels in transverse section in region 

 of hearts, showing one subintestinal. 



