XIII 



[. Anterior aorta. 

 ]i. a. ramus to lower caecal lobe. 



6. r. to adjacent walls of stomach and caecum. 



c. r. to caecal folds. 



d. V. to pancreas, 

 r. to dorsal plexus, 

 r. to blood gland. 

 r. to siplional retractors, 

 r. to liver. 



r. to nuchal retractors and mantle, 

 r. to cephalic retractor and part of liver. 

 r. to median salivary gland, 

 r. to eye. 

 r. to siphon, 

 r. to pharynx, 

 pedal ramus. 



21. 



31. 



41. 



51. 



61. 



71. 



81, 



fii, 

 101, 

 111. 

 121, 

 131 

 141. 

 151 

 161 

 171 



rami to the five arms. 



II. Posterior aorta. 



12. r. to ink sac. 



22. r. to rectum. 



32. r. to branchial heart. 



42. r. to sperm duct or oviduct. 



52. lateral pallial artery. 



62. median pallial artery. 



72. r. to mantle. 



82. r. to fin. 



92. arterial plexus. 



III. (ienital aorta. 



JV. Branchial vein. 

 V. Nephridial sinus. 

 1*. vein from rectum. 



VIII. Branchial artery. 



Fig. 10. Outer (right 1 surface of the sperm duct. 



Fig. 11. Inner surface of the proximal portion of the sperm duct. 



Fig. 12. Diagram of the spermatophoric gland. 



App. appendix , the second loop of the sperm duct. 

 Ci.G. ciliated canal of Chun. 

 D. vas deferens. 



Di. small tubular diverticulum from the appendix. 

 D.Pr. duct of the prostata. 

 G.S. genital sac. 



P. penis. 

 Pr. prostata. 



S.C. sperm canal of the first two portions of the seminal vesicle. 

 Sp.S. spermatophoric sac. 

 V. 1. first portion of the seminal vesicle. 



V. 1.1 acce.ssory lobe of the first portion of the seminal vesicle. 

 V. 2. second portion of seminal vesicle. 

 V. 3. third „ „ „ „ 



