\'i(l.-S. Isk. Skr. I. M.-\. Kl. ur^'^. Xo. 5. 



[// d. h. 



r. d. gi. 



a.p. 



1. d. jrl. V^^ 



C. gi. 



Al,/n,- ,M. 



F\g. -j. Anatomy of Arioii atir, somewhat diagrammatic. — ' 1. 

 Green: Alimentary canal, yellow: reproductive organs, red: circulatory system, orange: kidney, blue: 



nervous system. 

 a. a. aorta anterior, n. gl. albmnen gland, a. p. aorta posterior, atr. atrium genitale, c. gl. caudal gland, 

 (1. II. ductus hermaphroditicus, cp. epiphallus, /. /. floore of the lung, ^. gonad, k. kidney, I. ci. gl. left diges- 

 tive gland, /. Olli, left ommatophore, /. t. rrtr. left tentacular retractor, o. (free! oviduct, or.s. oesophagus, 

 i).-f.p.-d. ovispermatoduct, pitl. gl. pedal gland, peti. 11. pedal nerves, p/i. pharynx, />/;. rtfr. pharyngeal 

 retractor, pii. pneumostome, ;-. d. gl. right digestive gland, /■. /. rclr. right tentacular retractor, 

 >: I. roofe of the lung, rrc. receptaculum, rc/r. (genitall retractor, s.gL salivary gland, 

 sf. stomach, ;'. r/. vas deferens, i'. /1. ventricle of the heart. 



