INDEX, 



503 



Ornithorhynchus, on the eggs of, 75. 

 Orvotoblattina, new species of, 411. 



Owen, Sir R., ou the resemblance 

 of the upper molar teeth of Neo- 

 plagiaulax to those of Tritylodon, 

 265 ; on Ihe remains of filephas 

 primigenius from the Creswell 

 Bone-cave, 266. 



Pachastrella, new species of, 403. 



Pachycrasrus, new species of, 462. 



Pachylopus, new species of, 469. 



Palaeoblattina, new species of, 355. 



Paramicippa, on the species of, 12. 



Paraspongia, new species of, 318. 



Paromalus, new species of, 466. 



Paromylaeris, characters of the new 

 genns, 409. 



Pascoe, F. P., on some new Asiatic 

 Longicornia, 49. 



Pedoptila, description of the new 

 genus, 341. 



Pelagic fauna of the Baltic and Gulf 

 of Finland, on the, 498. 



Peltogaster, on the existence of a 

 nervous system in, 495. 



Periphragella Elisae, observations on, 

 394. 



Petalomouas, new species of, 438. 



Petrablattina, new species of, 412. 



Pidgeon, D., on some recent discove- 

 ries in the submerged forest of 

 Torbay, 69. 



Placodes, new species of, 458. 



Plaice and Flounders, on the mul- 

 tiple tumours of, 436. 



Plants, on some fossil, from the La- 

 narkshire Coal-field, 473. 



Platysoma, new species of, 459. 



Podophrya, new species of, 44(1 



Polyzoa, new marine, 244. 



Poroblattina, description of the new 

 genus, 413. 



Potts, E., on the wide distribution 

 of some American freshwater 

 Sponges, 20 ; on a new species of 

 freshwater Sponge, 425. 



Pouchet, G., on the pelagic fauna of 

 the Baltic, 498. 



Promylacris, characters of the new 

 genus, 409. 



Pseudoceratina, new species of, 204. 



Racodiscula asteroides, on the struc- 

 ture of, 400. 



Renia, characters of the new rreiuis, 

 467. 



Reptiles, uew, from Brazil, 191. 



Rhino^capha, new species of, 382. 



Rhizopoda of the deep-water fauna 

 of the Lake of Geneva, on the, 

 427. 



Riley, C. V., on a new insect inju- 

 rious to wheat, 356. 



Rotifer vulgaris, on the reproduction 

 and development of, 125. 



Samia cecropia, on a specimen of, 

 with a fifth aborted wing, 426. 



Sarcocornea, characters of the new 

 genus, 214. 



Sarcopsyllidse, on a new genus of 

 the family, 270. 



Scarabasus, new species of, 377. 



Schimkewitsch, W., on a new genus 

 of Sarcopsyllidse, 270. 



Schizoporella, new species of, 250. 



Schulze, F. E., on the relationship 

 of the Sponges to the Choano- 

 fiagellata, 365. 



Scorpion, on a fossil, from the Silu- 

 rian formation of Sweden, 76. 



Scudder, S. H., on new genera and 

 species of fossil Cockroaches, 408. 



Sigillaria, new species of, 357. 



Sniicra, new species of, 244. 



Solenophrya, new species of, 447. 



Sollas, Prof., on the structure of the 

 skeleton in the Anomocladina, 

 236. 



Sotira, characters of the new genus, 

 54. 



Southwell, T., on the reproduction of 

 the Monotremata, 75. 



Spiders, contributions to the biology 

 of, 70. 



Spiloblattina, new species of, 410. 



Spongelia, new species of, 219. 



Sponges, on some freshwater, 13, 18, 

 20 ; on the development of, 73 ; 

 on the mode of circulation in the, 

 117 ; new, 107, 196, 301, 387, 

 425; on the structure of the 

 skeleton in some, 236 ; on the re- 

 lationship of the, to the Choano- 

 Hagellata, 365 ; observations on, 

 453. 



Spongilla, new species of, 19, 425. 



Spongilke, on the development of 

 the, 73. 



Spongiophaga communis, observa- 

 tions on, 315. 



Stebbing, Rev. T. R. R., on a new 

 English Amphipodous Crustacean, 

 59. 



Stelospongus, new species of, 305. 



Sth^nias, new species of, 52. 



