btcc 



t.bii^ 



-jj—post OGS 



i 013. — Triton nodiferus. Dissection uf the internal organs of a female, viewed from the 

 dorsal side. The roof of the mantle- cavity has been divided by a longitudinal incision and the 

 flaps laid out, thafon the left bearing the ctenidium and nsphradium, and that on the right the 

 rectum and terminal part of the oviduct. The muscular dorsal wall of the body and the 

 introvert have been divided so as to bring into view the anterior part of the alimentary canal 

 and a portion of the nervous sj'stem. The buccal cavity has been tilted up and opened so as 

 to show the odontophore, and the oesophagus has been cut through near the anterior end. 

 A portion of the ventral wall of the crop has been removed so as to bring the internal 

 folds into view, and the interior of the nephridium with the contained portion of the 

 intestine has been exposed. NoU. The complete course of the intestine through the 

 nephridium is not shown ; the stomach is not seen, being hidden Ijy the nephridium, and 

 the ovary ia not represented, ait. anus; ant. aort, anterior aorta ; aur. auricle; /juc. buccal 

 cavity ; cer. hue. con. cerebro-buccal connective ; cer. g. cerebral ganglia ; crojtt crop ; rten. 

 ctenidium ; int. intestine ; jaw, jaw ; I. hue. g. left buccal ganglia ; L. sal. gl. left salivary 

 gland ; neiih. nephridium ; neph. ap. nephridial aperture ; od. odontophore ; wti. u;.suphagus ; 

 ten', anterior end of same, cut and turned aside; osph. osphradium ; ovkL oviduct; ovid'. 

 terminal thick-walled portion of oviduct ; pleur. g. pleural ganglion ; -post. aort. posterior 

 aorta; post. rep. postericr tesophagus ; ratL s. radulasac; *ff(. rectum ; r. saZ. r//. right salivary 

 gland; m^ du. salivary duct; sijyh. siphon; supra, g. supra-ossophageal visceral ganglion; 

 tent, tentacle ; tent. n. tentacular nerve ; vent, ventricle. 



