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HANDBOOK OF INVERTEBRATE ZOOLOGY. 



Their posterior ends are flattened, and lie near the sur- 

 face of the body. Notice that the cavity of the renal organ 



entirely surrounds the 

 glandular portion of the 

 blood-vessel. 



Fig. 178. — Superficial dis- 

 section of the renal and cir- 

 culatory organs of male speci- 

 men of Loligo Pealii. (Drawn 

 from nature by W. K. Brooks. ) 

 The capsules of the renal 

 organs are opened, and the 

 blood-vessels are freed from 

 the adjacent organs. 



a. Rectum, cut across. 

 b. Gills, c. Branchial veins. 

 d. Ink bag. e. Penis. /. Open- 

 ings of renal organs, g. Cav- 

 ity of renal organ, h. Intes- 

 tine, i. Glandular portion of 

 anterior vena cava. k. Sys- 

 temic heart. I. Branchial ar- 

 tery, m. Gill muscle, n. Nu- 

 trient artery of gill. o. Bran- 

 chial heart, p. Glandular 

 portion of posterior vena 

 cava. q. Enlarged portion 

 of posterior vena cava. r. Lat- 

 eral mantle artery, s. Stom- 

 ach, t. CEsophageal end of 

 stomach, ii. Reproductive 

 organs. s'. Blind sac of 

 stomach, w. Capsule of ab- 

 dominal viscera, or perito- 

 neum. X. Artery to stomach 

 Fig. 178. and mantle. 



h. The anterior vena cava runs backwards as far as the 

 branchial heart, where it unites with a much shorter 

 glandular structure, the glandular portion of the posterior 



