ON NAUTILUS AND SOME OTHER ORGANISMS. 149 
left, arise from it almost at right angles to it. 
These may be 
called the branchio-osphradial branches of the anterior pallial 
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Fic. 1—N. pompilius, 
9. View of ventral surface of pallial and 
visceral regions, to show the course of the pallial arteries. A Funnel. 
Free edge of mantle. 
7. a. Radial paljial arteries. 
artery. a.p.a. Anterior pallial artery. 
a. g. Region of nidamental gland. 
b. 0. a. Branchio-osphradial artery. s. m. Shell-muscle. 7. 0. Region of 
renal organs. /. Heart. p.p.a. Posterior pallial artery. g. Gonad. 
Intestinal branch of anterior pallial artery. 
Mm. e. 
m. a. Marginal pallial 
1. Qe 
