Henchman. — Nervous System of Liraax 



PLATE X. 



Fig. 121. (See explanation of Figs 97-100, Plate VIII.) Tiie 127tii section; it 

 passes through the left cerebral invagination, also through the left 

 cerebral and buccal ganglia, and tlieir connective, x 237. 



" 122. (See explanation of Figs. 103, 103^ Plate VIII ) The 217lii section of 

 the series. It passes through the right cerebral ganglion and its lat- 

 eral lobe; it also shows the ocular tentacle and the wall of the riglit 

 eye, transverse sections of the oesophagus, salivary glands, radula sac, 

 and primary se.xual duct, x 237. 



" 123. (See explanation of Figs. 97-109, Plate VIII ) Tliis section passes 

 tiirough the right pleural and visceral ganglia, a small portion of the 

 left pleural and visceral ganglia, and the abdominal ganglion, which 

 lies between the cesopiiagus and radula sac. X 250. 



" 124. Tlie posterior face of a transverse section from an embryo of the six- 

 teenth dnij. The left side is cut a little in advance of the rigiit. The 

 section passes through tiie cerebral invagination, — still open to the 

 exterior, — the cerebral ganglion of the left side and its lateral lobe, 

 and the left buccal ganglion It also shows in cross section the duct 

 of the salivary gland, and a small portion of tlie wall of the radula 

 sac. X 237. Perenyi's fluid ; picro-carminate of lithium. 



" 125, 126. See e.xplanation of Figs. 97-100, Plate VIII. 



" 125. The l'22d section; it shows the left pleural and visceral ganglia, with 

 the pleuro-visceral connective, and a small portion of the left cerebral 

 ganglion. X 250. 



" 120. The 139th section ; it shows in section the left cerebral invagination, 

 the cerebral ganglion, and the cerebral commissure, x 250. 



" 127. (See e.xplanation of Figs. 103, 103^ Plate VIII.) The 225th section; it 

 .shows the cerebral invagination, and the right lateral lobe of the 

 brain. (Compare Plate VIII. Fig. 108.) x 237. 



