INDEX. 



503 



Peribasis, new species of, 373. 

 Perieria, characters of the new 



genus, 111. 

 Petrolisthes, new species of, 397. 

 Pholcus, new species of, 451. 

 Phyciodes, new species of, 2G0. 

 Phygasia, new species of, 231. 

 Plants, on fossil, from Grinnell Land, 



95. 

 Platytroctes, chamcters of the new 



genus, 249. 

 Podoceropsis, new species of, 367. 

 Polycheles, new species of, 277. 

 Polyonyx, new species of, 405. 

 Pomelia, description of the new 



genus, 3S5. 

 Porcellana, new species of, 405. 

 Porcellanidea of the west coast of 



North America, 394. 

 Portheus, on some remains of, 93. 

 Prasonia, new species of, 230. 

 Prasyptera, characters of the new 



genus, 411. 

 Prawns, on the Nauplius stage of, 



79, 233, 426. 

 Procolophon, new species of, .342. 

 Pseudonaclia, new species of, 293. 

 Pycnopsis, new species of, 374. 

 Pygopterus, note on the genu^, 90. 

 Rhizopoda, on a new order of extinct, 



297. 

 Salenidfe, on the, 59. 

 Salviu, O , on new species of Rhopalo- 



cera, 257. 

 Sanson, A., on parthenogenesis in 



bees, 497. 

 Saribia, characters of the new genus, 



289. 

 Sarotes venatoriu^, on the probable 



distribution of, by the trade-winds, 



270. 

 Saurocephalus, remarks on the genus, 



345. 

 Saurus lucioceps, note on, .348. 

 Schiodte, M., on the propagation and 



metamorphoses of the Cymotho- 



adae, 195. 

 Scopelus, new species of, 184. 

 Scopida, new species of, 297. 

 Scyllium, new species of, 18. 

 Seals, on the Ascarides of the, 430. 

 Seeley, H. G., on new species of 



Procolophon, 342. 

 Selaginopsis, new species of, 435. 

 Sertularella, new species of, 447. 

 Sertidaria, new species of, 446. 

 Setarches, new species of, 179. 



Sharp, D., on the Dasciilidas of New 



Zealand, 40. 

 Shells, on some British land and 



freshwater, 377 ; new, 482. 

 Sim, G., on Diastylis bimarginatus, 



453. 

 Siphonia, on the structure and affi- 

 nities of the genus, 91. 

 Sirerabo, new species of, 19. 

 Smith, E. A., on two new species of 



land-shells, 482. 

 Sollas, W. J., on the genus Siphonia, 



91 ; on the genus Catagma, 353. 

 Sozuza, new species of, 457. 

 Spiders, new, 451. 

 Spidia, characters of new genus, 



460. 

 Sponges, new family of calcareous, 



35; studies on fossil, 113, 235, 



324, 385, 467 ; on the embryology 



of, 139; on the parasites of, 157, 



427 ; on a new genus of, 353. 

 Spongiophaga communis, description 



of, 168. 

 Sqiulla, new species of, 466. 

 Staphylopteris Peachii, observations 



on, 90. 

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



species of x\mphipodous Crusta- 

 ceans, 364 ; on Amphipoda in 



sponges, 427. 

 Stelleiida, on the classification of the, 



103. 

 Stibolepis, characters of tlie new 



genus, 463. 

 Stromatopora, on the structure of, 



28, 85. 

 Stromatoporidse, on the, 304, 342, 343. 

 Suctoria, on the Nauplius and pupa 



stage of, 233. 

 Symmerista, new species of, 179. 

 Srringospha3ridae, on the new order, 



'297. 

 Systena, new species of, 229. 

 Tapparone-Canefri, C, on the Mol- 



luscan fauna of New Guinea, 



110. 

 Teichouellidce, on the new familv, 



35. 

 Temnosternus, new species of, 371. 

 Teracolus, new species of, 178. 

 Tethea muricata, observations on, 



174. 

 Thalasfciinidea of the Pacific coast, on 



the, 299. 

 Theridion, new species of, 452. 

 Tithorea, new species of, 269. 



