INDEX. 
Prawns, on the Nauplius stage of, 
481. 
Pterygospidea, new species of, 344. 
Ptilophora, new species of, 231. 
Ptilopus, new species of, 349. 
Pulvillus, new species of, 137. 
Purisiphonia Clarkei, observations on, 
376. 
Pyrausta, new species of, 235. 
Radinacra, new species of, 161. 
Raphia, new species of, 193. 
Raphidhistia, new species of, 140. 
Rhizopoda of the Salt Lake of Sza- 
mosfalva, on the, 423; on the Re- 
ticularian and Radiolarian, of the 
North-Polar Expedition, 1875-76, 
425, 
Rhizopodan masons, on the archi- 
tectural achievements of, 284. 
Reclada, characters of the new genus, 
370. 
Remigia, new species of, 295. 
Renaut, J., on the dorsal chord in 
Amphioxus, 492. 
Retepora, observations on the genus, 
with descriptions of new species, 
353. 
Salda, new species of, 373. 
Scedopla, new species of, 201. 
Schneider, Prof., on the structure of 
Amphioxus lanceolatus, 262. 
Scops, new species of, 174. 
Scudder, S. H.,on sexual dimorphism 
in butterflies, 184, 
Sebastes, new species of, 485. 
Selaginopsis, notes on, 189, 421. 
Selenis, new species of, 294. 
Selidosema, new species of, 406. 
Semiophora, new species of, 166. 
Sertularella, new species of, 330. 
Sertularia, new species of, 331. 
Shrews, on the migrations and meta- 
morphoses of the tapeworms of 
the, 258. 
Silex, on the replacement of, by 
calcite, 134, 412, 417. 
Smith, E. A., on a new species of 
Spatangide, 67; on a remarkable 
new form of Ophiuride, 463. 
Solitaire, on the, 87. 
Sollas, W.J., on two new and remark- 
able species of Cliona, 54. 
Spelotis, new species of, 164, 233. 
Spheria, new species of, 50. 
Spiders, notes on British, with de- 
sciptions of new, 105. 
Sponges, on the affinity of the, 1; 
499 
new, 79, 279; on new, from the 
Carboniferous of the S.W. of 
Scotland, 128; on the position of 
the sponge-spicule in the, 170; on 
calcareous, in the Devonian Lime- 
stone, 412. 
Squamulina scopula, on the nature 
of, 1, 170, 267. 
Stebbing, Rev. T. R. R., on sessile- 
eyed Crustaceans, 31. 
Sternotomis cornutor, on the locality 
and synonyms of, 424. 
Stilbum, new species of, 27. 
Stimpsonia chelifera, observations 
on, 34, 
Syrichthus, new species of, 346. 
bee new species of, 166, 
Tapeworms of the shrews, on the 
migrations and metamorphoses of 
the, 258. 
Technitella, characters of the new 
genus, 279. 
Tephrosia, new species of, 397. 
Thalassodes, new species of, 399. 
Thalera, new species of, 399. 
Thera, new species of, 236. 
Thiopsyche, characters of the new 
genus, 393. 
Thysanochilus, new species of, 404. 
Toxocampa, new species of, 290, 
Trichobasis, new species of, 26. 
Triphenopsis, characters of the new 
genus, 163. 
Turbellaria, on a new class of ani- 
mals parasitic on, 181; of the deep 
fauna of the Lake of Geneva, on 
the origin and distribution of, 490. 
Turdus, new species of, 374. 
Urapteryx, new species of, 392. 
Vanessa, new species of, 227. 
Vernet, H., on a new genus of Ostra- 
code Crustacean, 352. 
Villot, A., on the migrations and 
metamorphoses of the tapeworms 
of the shrews, 258. 
Wachsmuth, C., on the structure of 
aleeozoic Crinoids, 379, 453. 
agnerella, description of the new 
genus, 70, 
Waterhouse, C. O., on the locality 
and synonyms of Sternotomis cor- 
nutor, 424; on a new species of 
Dryops, 491. 
White, Dr. F. B., on new species of 
heteropterous Hemiptera, 365. 
Winther, G., on the geographical 
