INDEX. 
Moreh, O. A. L., on the genus Chev- 
reulius, 313. 
Mollusca, on the terrestrial and flu- 
viatile, of Trinidad, 42; on the 
multiplicity and termination of the 
nerves in the, 157 ; on new Pleis- 
tocene, from California, 274. 
Mugil, new species of, 318. 
Murenoid fishes, on the swimming- 
bladder and sexual organs of the, 
388. 
Mustelus, new species of, 320. 
Natural-history specimens, on a new 
fluid for preserving, 385. 
Nematode worms, on the develop- 
mental history of the, 331, 447. 
Nephanes, new species of, 148. 
Noctilionidz, synopsis of the genera 
of, 92. 
Notulz Lichenologice, 58, 183, 270, 
348, 437. 
Nylander, Dr. W., on the reaction of 
iodine in Lichens and Fungi, 58, 
190; on new British Lichens, 59, 
348. 
Odax, new species of, 319. 
Ollulanus, description of the new ge- 
nus, 332. 
Opalia, new species of, 277. 
Opegrapha, new British species of, 
62; on the saxicolar species of, 
437. 
Oreodera, new species of, 433. 
Owen, Prof., on the parturition of 
the Marsupials, 382. 
Pagurus, on the British species of, 25. 
Palinurus, on the structure of the 
antenne of, 26. 
Paludicella Ehrenbergi, on the occur- 
rence of, in Shropshire, 237. 
Parapistus, characters of the genus, 
318. 
Parasitism, on a new mode of, 155. 
Pediculus, on the structure of the 
mouth in, 213. 
Pentaceros, new species of, 311. 
Perch, on the spawn of the, 79. 
Perna, new species of, 178. 
Pertusaria, new British species of, 
61, 349. 
Peters, Prof., on a fossil Lizard in 
copal, 78; on the systematic posi- 
tion of the Lepidosirens, 473. 
Phza, new species of, 367. 
Phasianus, on a probably new species 
of, 150. 
479 
Phthiriasis, observations on, 213. 
Pinna, on the subdivisions of the ge- 
nus, 81. 
Pinnipedes, observations on the, 444. 
Pisania, new species of, 277. 
Plateau, F., on the muscular force of 
insects, 139. 
Platycephalus, new species of, 312. 
Plectropoma, new species of, 317. 
Plekocheilus, new species of, 51, 
Plicatula, new species of, 176. 
Polypes, on the urticating capsules 
of some, 387. 
Polystichum, on a new species of, 
287. 
Polythalamia, on the morphological 
structure and the motory pheno- 
mena of the contractile substance 
of the, 351. 
Pretilia, description of the new ge- 
nus, 302. 
Pristolepis, note on the genus, 153. 
Prymnosis, characters of the new ge- 
nus, 288. 
Pterodactyles, on the ornithic nature 
of the, 321. 
Pyrenidium, new British species of, 
60. 
Pyrenopsis, new British species of, 
349. 
Quatrefages, A. de, on the classifica- 
tion of the Annelides, 1, 107. 
Ransom, Dr. W. H., on purifying the 
water for the purpose of fish- 
hatching, 77; on the spawn of the 
Perch, 79. 
Reichert, M., on the morphological 
structure and the motory pheno- 
mena of the contractile substance 
of the Polythalamia, 351. 
Rhynchonella Geinitziana, on the 
structure of, 306. 
Richardsonia, characters of the new 
genus, 319, 
Royal Institution, proceedings of the, 
375. 
Salenia, new species of, 180. 
Saurornia, on the new subclass, 321. 
Schjodte, Prof. J. C., on phthiriasis, 
and on the structure of the mouth 
in Pediculus, 213. 
Schmidt, Prof. O., on the occurrence 
of bones of Marmots near Graz, 
392. 
Schuettea, characters of the new ge- 
nus, 320. 
