INDEX. 



The more important references are indicated by heavier figures. 



Acanthascus, n. gen., 145, 375. 



„ cactus, n. sp., 148, 375 (PI. Ivii.). 



„ duhius, n. sp., 147, 375 (PI. Ivii.). 



,, (jrossularia, n. sp., 145, 375 (PI. Ivi.). 



Acantlwspomjia, Salt, 14, 184. 

 Acanthospongioe, 56. 

 Actiniae, Eurete marshallt, 297. 



„ Eurctc semperi, 292. 

 Adrasta, 7. 



Aega spongiopliila, 56. 

 Afferent passages, 20. 

 Agassiz, 61. 



,, exploration by, 427. 

 Aleyoncellum speciosum, 5, 54. 

 Amphidiscs, 36, 48; firtree-Iike, 212; largest, 202; 



peculiar, 192. 

 Amphidiscophora, 178, 380 ; phylogeny, 492. 

 Ancora, 48. 



Anderson, T., 18; on Japanese sponges, 276. 

 Annular thickening, 171, 173, 192. 

 Anomocladina, 16. 

 Antarctic Ocean, Balanifes, 122; Holascus, 368; 



Polyrhahdus, 121. 

 Antilles Islands, Aplirocallistes, 395; Cyrtaulon, 400; 

 Euplectella, 366; Regadrella, 367; Rliahdo- 

 peetella, 371. 

 Aphrocallisfes, Gray, 305, 306, 310, 395. 



heatru; Gray, 305, 311, 396 (PI. 

 Ixxxiv.). 

 „ hocagei, Wright, 306, 313, 395 (Pis. 



Ixxxiii., Ixxxiv.). 

 „ ramosus, n. sp., 319, 396 (PL l.xxxvi.). 



Aplirocallistes vastus, n. sp., 311, 315, 317, 396 (PI. 

 Ixxxv.). 

 „ tubulosus, 311. 



Apical cone, Hyalonema tkomsoni, 213. 

 Ascension, Aplirocallistes, 313. 

 Asconema, Sav. Kent, 113. 

 „ kentii, 207. 



„ setuhalense, Sav. Kent, 116, 371 (PI. xxi.). 

 Asconematidse, 371. 



„ defined, 113. 



„ bathymetrical distribution, 456, 458. 



,, geographical, 436. 



„ phylogeny, 494. 



Asconematins, 113, 371. 

 Astylospongidfe, Zittel, 12, 18. 

 Asynauloidae, 10, 487. 

 Aulascus, n. gen., 118, 372. 



„ johnstoni, n. sp., 118, 372 (PI. xxii.). 

 Aulocalyx, u. gen., 174, 380. 



„ irregularis, n. sp., 174, 380, 491 (PL Lx.). 

 Aulochone, n. gen., 168, 378. 



„ cylindrica, n. sp., 168, 171, 379 (Pie. 

 Ixvi., Ixviii.). 

 Uliuw, 170, 171, 379 (PI. Ixviii.). 

 Aulocystis, n. gen., 405. 



„ grayi, Bwk., 357, 405 (PL civ.). 



zitteUi (Marshall), 361, 406 (PL civ.). 

 Aulodictyon, Saville Kent, 269. 



,, woodward a, 286. 



Australia, Holascus, 87, 89, 368; Hycdonema, 209, 



383. 

 Autodermalia, 43, 49. 



