EXPLANATION OF THE PLATES. 



a anus 



aor aorta 



ap anterior pedal gland 



b brain 



be buccal commissure 



bg labiobuccal ganglion 



br gill 



brn nerve to gill 



c intestinal coecum 



cl cloacal chamber 



CO cloacal coecum 



cp coelomoduct 



da dorsal aorta 



dsg dorsal salivary gland 



fo buccal plate 



gl glands of pharynx 



gon gonad 



ht heart 



int intestine 



II ic labiobuccal connective 



liv liver 



m mouth 



n nerve to buccal plate 



oe oesophagus 



pc pedal ganglion 



peg precerebral ganglion 



pcm pericardium 



ph pharynx 



pi lateral ganglion 



ps pedal sinus 



r radula 



re seminal receptacle 



rs radular support 



s anterior vertical septum 



sc subradular commissure 



sg ventral salivary gland 



sgl shell gland 



sn subradular ganglion 



so sense organ 



sp spicule 



sr dorsal gill retractor 



sro subradular organ 



sto stomach 



sv seminal vesicle 



vr ventral gill retractor 



vs ventral diaphragm 



