INDEX. 
Polythalamia from inland salt water 
in Hungary, on, 307. 
Polyzoa of the Queen Charlotte 
Islands, on the, 49, 203; on Prof. 
Seguenza’s list of Tertiary, 265 ; 
on new marine, 356, 
Porella, new species of, 51, 212, 
361. 
Potts, E., on freshwater Sponges as 
improbable causes of the pollution 
of river-water, 486. 
Priocnemis, new species of, 408. 
Pseudoboletia, on the species of, 
108. 
Pterothamnion, on the fertilization 
of, 22. 
Ptilocaulis, characters of the genus, 
130. 
Ptycholepis, new species of, 835, 
Quelch, J. J., on new Stylasteride, 
with remarks on some reéently 
described forms, 111, 267; on 
Schizoporella Ridleyi and S. sim- 
plex, 215; on new genera and 
species of reef-corals, 292. 
Rana, new species of, 397. 
Rana esculenta, on the influence of 
physico-chemical agencies upon 
the development of the tadpoles of, 
2 
Reptiles, new, 596, 
Rhizomopteris, remarks on the genus, 
76. 
Rhizostoma, on the development of 
the ephyre of, 175. 
Rhytidosteus capensis, observations 
on, 481. 
Ridley, 8. O., on growth and budding 
in the Madreporide, and on a new 
genus, 284. 
Rotatoria, new genera and species of, 
309. 
Salatura, new species of, 58. 
Sandalolitha, characters of the new 
genus, 294, 
Schizaspidia, new species of, 403. 
Schizocerca, characters of the new 
genus, 309. 
Schizoporella Ridleyi and S. simplex, 
observations on, 215. 
Schmitz, Prof. F., on the fertilization 
of the Floridez, 1, 80. 
Schnetzler, J. B., on an aerial Alga 
inhabiting the bark of the vine, 
232. 
495 
Schutzia, new species of, 77. 
Scinaia, on the fertilization of, 13. 
Scotosia, new species of, 275. 
Seguenza’s, Prof. G., list of Tertiary 
Polyzoa from Reggio, observations 
on, 265, 
Sharpe, Dr. B., on visual organs in 
Solen, 148. 
Smittia, new species of, 52. 
Solen, on visual organs in, 148, 
Spheerarthrum, characters of the new 
genus, 281. 
Spiders, on two new Californian, 
229, 
Spiramia, new species of, 202. 
Spiropteris, remarks on the genus, 
74. 
Sponges, on some freshwater, 96; 
characters of new genera of, 129 ; 
on the gemmules of the freshwater, 
163; on the branched and un- 
branched forms of the freshwater, 
269; notes on some freshwater, 
486. 
Spongia paradoxica, on the so-called, 
298. 
Staurastrum, new species of, 146. 
Stenostoma, new species of, 596. 
Stromatopora, on the assumed rela- 
tionship of Parkeria to, 553. 
Stylaster, new species of, 112. 
Stylasteride, on new, with remarks 
on some recently described forms, 
111, 218, 267. 
Sympheedra, new species of, 59. 
Syringopora, on the structure of the 
skeleton in, 29. 
Tadpoles, on the influence of physico- 
chemical agencies upon the deve- 
lopment of, 72. 
Tephrosia, new species of, 275. 
Terias, new species of, 196. 
Tichoseris, characters of the new 
genus, 295. 
Tomes, R. F., on the Madreporaria 
of the White Lias, 483. 
Traquair, Dr. R. H., on the genus 
Gyracanthus, 87. 
Triballus, new species of, 137. 
Trichoplax adherens, observations 
on, 381. 
Trilobite, on the injured eye of a, 69. 
Tritylodon longevus, on the skull 
and dentition of, 61. 
Tryponzus, new species of, 138. 
