ANALYSIS OF THE LESSONS. XXV11 



1185. The respiratory ganglions. 1186. The pallial nerves. 1187. The post- 

 pallial nerves. 1188. Remarks. 



LESSON LXXX. NERVOUS SYSTEM IN THE GASTEROPODA, p. 263 



1189. The word explained. 1190. Their sexes. 1191. Their muscular sys- 

 tem. 1192. Aggregation of the nervous system. 1193. The principal centres 

 of the nervous system. 1194. The nervous system of Bulla lignaria. 1195. In 

 the Carinaria Mediterranea. 1196. Greatest accumulation of cerebral nervous 

 matter in Buccinum and ffarpa. 1197. Nervous system of Harpa elongata. 

 1198. Remarks. 



LESSON LXXXI. NERVOUS SYSTEM IN PTEROPODA AND CEPHALOPODA, p. 266. 



1199. Origin of the name. 1200. General particulars of the class. 1201. 

 Their nervous system. 1202. Nervous system of Clio borealis. 1203. The CE- 

 PHALOPODS the nearest to the Yertebrata. 1204. The nervous system of Nauti- 

 lus pompilius. 



LESSON LXXXIL NERVOUS SYSTEM IN THE FISHES, p. 268. 



1205. Preliminary remarks. 1206. The nervous system in the long worm- 

 like .Fishes. 1207. Analogous to the highest Vertebrata. 1208. The brain does 

 not fill the cavity of the cranium. 1209. The spinal chord nearly equal in its 

 development. 1210. Its condition in Rays and Flying-fishes. 



LESSON LXXXIII. NERVOUS SYSTEM IN FISHES, CONCLUDED, ... p. 270. 



1211. Ganglionic enlargements of the spinal chord in the Trigla cucullus. 

 1212. Demonstration of them. 1213. The posterior extremity of the spinal 

 chord sometimes enlarged. 1214. Three pairs of rounded lobes in the brain of 

 the Conger Eel. 1215. Description of them. 1216. The optic lobes. 1217. 

 The cerebral hemispheres. 1218. The olfactory tubercles. 1219. Size of the 

 optic lobes in Trigla lyra. 1220. Development of the optic lobes. 1221. The 

 medullary walls. 1222. Comparison of the optic lobes of Fishes with human 

 optic lobes. 



LESSON LXXXIY. NERVOUS SYSTEM IN REPTILES, p. 271. 



1223. Preliminary observations. 1224. Continued: concluded. 1225. Ner- 

 vous system of the Tadpole : description continued. 1226. Description con- 

 cluded. 1227. Development of nervous system in the higher amphibia com- 

 pared with the human embryo. 1228. Nervous system of adult Frog, and its 

 developing condition. 1229. The Reptile brain, and the brain of Fishes, con- 

 trasted. 



LESSON LXXXY. NERVOUS SYSTEM IN THE BIRDS, p. 273. 



1230. Condition of the brain in the class. 1231. The Cerebellum. 1232. 

 The optic ganglia. 1233. The Cerebral hemispheres. 1234. The connection 

 of Birds and Reptiles in the Old World. 1235. The brain of the Chick, after 



