XII 



PHYLUM MOLLUSCA 



a branchial ganglion at the base of the cteniilium,an<l runningal.mg 

 its axis to its extremity. Two other ganglia of considerable size 



aort 



Fl(i.:(i'28. Sepia cultrata, heart and main blood-vessels from the posterior a.-pect. nn,-t. aorta : 

 aort'. aboral aorta ; j>/>. appendage of right branchial heart ; i_rf'. //,-. r. right efferent branchial 

 vessel ; in.k n. artery to ink-sac ; it>k. c. vein from ink-sac ; /. itff. ///. >. left afferent branchial 

 vessel ; 1. nur. left auricle ; <)/. ,-. deep ovarian vein ; or. /. superficial ovarian vein ; pull. . 

 pallial vein; /. //. r. right abdominal vein; r. (iff. hi-, r. rigiit afferent liranehial vein; 

 ,-. !/!_,>. right ctenidium ; /. be. ht. right liranehial heart ; c. /v-. vena cava ; iv n. "/>/>. venous 

 appendages ; <v,if. ventricle. 



cer.buc.con 



o. 



II 



V CSC. 71 



l-'iu. c'l-j'.i. Sepia cultrata, cephalic gang- 

 lia from the anterior aspect, no. aorta ; 

 lmr. buccal ganglion ; rf/-. li,n; <-o,i. cere- 

 bro-buccal connective ; r._r. .</. cerebral 

 ganglion ; opt. <;. optic ganglion (removed 

 on the left side) ; opt. xt. optic stalk : 

 /'//. >),. pallial nerve; pi. ;i. pleural gang- 

 lion ; rise. it. visceral nerves. 



PIG. ii30. Sepia cultrata, anterior view 



of pedal and plcuro-visccral ganglia after 

 removal of the eereliral and optic: b>: -. 

 brachial nerves; conn, connectives l.e- 

 tween the cerebral ami the pedal and 

 pleuro-visceral ganglia (cut across) ; .///; ,/. 

 nerve to funnel : pall. n. p:illial nerves ; 

 vigc. i>. visceral nerve>. 



the visceral and the gustric occur in the course of this s\ >t i 'in. The 

 pleuro-visceral ganglia also give off two very stout jmlli<il nerves 

 (pall, n.} which run through the neck to the inner surface of the 



