Chap. XIV.] 



THE EARTHWORM. 



281 



c. 



A. 



FIG. 84. EARTHWORM : GENERAL ANATOMY. 



A. Adult earthworm opened out from dorsal side. B. Sexually immature 

 worm. C. Segmental organ (partly after Gegenbaur). 



In A. or B. b. e. Buccal cavity, c. g. Calciferous glands, c. v. d. Common 

 vas deferens. cr. Crop. gi. Gizzard, h. Hearts, int. Intestine, m. g. p. Male 

 genital pore, n .ch. Nerve-chain, oss. (Esophagus, ovd. Oviduct, ovy. Ovary. v 

 ph. Pharynx, pr. s. Prostomium. r. i. ii. Rosette-like openings of vasa defer- 

 cntia. se. Seta sac. s. o. Segmental organ, s. ces. g. Supra-oesophageal gan- 

 glion. S2). i. ii. Spermathecge . ts. i. ii. Testes. v. s. i. ii. iii. Vesiculse seminales. 

 1-20. Bodj'-rings. 



In C. i. o. Internal opening. 1. Thin- walled tube indicated by fine line. 

 2. Thick-walled ciliated portion. 3. Muscular portion. 



