INDEX. 



4<35 



Nocturnal lizards, ii. 152. 

 North American sirens, ii. 97." 

 Nostrils of fishes described, i. 14. 

 Notocanthins, characters of, ii. 37. 

 Notopterus, characters of, i. 283. 



O. 



Odontognathus, characters of, i. 



288. 

 Oken's arrangement, i. 92. 

 Omobranchus filamentosus,figurec:^ 



ii. 79. 

 Operculum, structure of, i. 12. Use 



and structure, 41. 

 Ophides, general characters of, ii. 



107. 155. Arrangements of, 136. 



Primary groups of, 138. 

 Ophidians, general characters of, ii. 



100. 

 Ophidonidae, general characters of, 



ii. 48. 

 Osteoglossum, characters of, i. 266. 

 Osteoglossum bicirrhosum, tigured 



and described, i. 287. 

 Ostracinee, general characters of, i. 



195. 



P. 



Pachypterus, characters of, i. 346. 



Paradise fish, ii. 27. 



Parr, i.251. 



Parrot fish, ii. 26. 



Pectoral fins described, i. 15. Re- 

 present the fore-feet of quadru- 

 peds and wings of birds, 15. Pro- 

 cesses ofin the genus Polynemus, 

 19. 



Pedal ion gigas, figured and des- 

 cribed, i. 199. 



Pelor, figured, ii. 56. 



Perca, characters of, il 17. 



Perches described, ii. 14, 15. 



Perches, mailed, ii. 21. 



Perches, true, described, ii. 15. 



Percidffi, general characters of, ii. 

 14, 15. 



Percinee, general characters of, ii. 

 16. Divisions of, 17. 



Petromyzon, its natural situation 

 considered, i. 217. 



Petromyzonidee, general characters 

 of, i 223. 



Phycinae, general characters of, ii. 

 321. 



Phycis longepennis, figured, i. 322. 



Physis of the ancients, supposed to 

 be the goby, ii. 81. 



Piabucus, characters of, i. 255. 



Picked dog-fish, its singular mode 

 of defence, i. l47. 



Pikes, described, i. 293. 



Pikes, fluviatile, habits and vora- 

 city of, i. 302. Doubtful story of 

 a huge one caught at Heilbiun, 

 302. Large one caught in Scot- 

 land, 303. 



Pilchard, natural histories of, i. 

 271. Fishery, 273. 



Pilot-fish, ii. 38. 



PimelodinEB, general characters of, 

 i.331. 338. 



Pimelodus, characters of, i. 340. 



Pipe-fish, described, i. 'ZOS. 



Plaice, i 313. 



Piatycephalus, characters of, ii. 57. 



Platydactyli, general characters of, 

 ii. 152. 



Platygaster, characters of, i. 278. 



Plecostomus, characters of, i. 336. 



Plectognathes, general characters 

 of, i. 102. 189. Arrangement of, 

 191. 



Plesiosaurus, general characters of, 

 ii. 122. 



Pleuronectidee, general characters 

 of, i. 230. 310. 



Plotosus, figured, i. 331. Charac- 

 ters of, 349. 



Poecilina multilineata, figured and 

 described, i. 365. 



Pcecilinee, general characters of, 

 i. 365. 



Polynemus, processes of the pecto- 

 ral fips in, i. 19. 



Polyodon reticulatus, figured and 

 described, i. 123. 



Polypterus niloticus, figured and 

 described, i. 203. 



Pond loach, habits of, i. 362. 



Poor, i. 317. 



Potemkin, instance of the extra- 

 vagance of, i. 125. 



Pout, i. 317. 



Pre-operculum described, i. 41. 



Preservation of fish for museums. 

 i.68. 



Pristis, figured and described, i. 135. 



Pristogaster, figured and described, 

 i. 266. Characters of, 277. 



Proteus described and figured, ii. 

 95. 



PteraclidsR, ii. 47. 



Pteridium, characters of, i. 323. 



Pterocephaliuffi, general characters 

 of, i. 174. 



Pterodactyl!, connection of birds 

 and reptiles by the, i. 9. Gene- 

 ral characters of, ii. 124. Station 

 of, 19.8. Analogies of, ii. ISO. 



Pusichthys, characters of, i. 348. 



Q. 



Quadrupeds, relations of to fishes, 

 i. 8. Fore-feet of, represented by 



F F 2 



