IV CONTENTS. 



Tetraxonida — Continued. 



Hadromerina — Continued. Page 



Family Donatiidae 333 



Donatia Nardo 335 



ingalli (Bowerbank), var. seychellensis (E. P. Wright) __ 335 



Tuberella Keller 340 



ciliata, new species 341 



Family Spirastrellidae 342 



Spirastrella O. Schmidt 343 



vagabunda Ridley 343 



Placospongia Gray 346 



melobesioides Gra} r 346 



Family Polymastidae 347 



Trichostemma Sars 347 



straticulatum, new species 347 



Family Suberitidae 351 



Rhizaxinella Keller 351 



nuda, new species 352 



Family Clionidae 353 



Family Stylocordylidae 353 



Family Chondrosidae 353 



Family Astraxinellidae 354 



Sigmatophora 355 



Family Samidae 355 



Family Tetillidae 355 



Tetilla O. Schmidt 355 



dactyloidea Carter 358 



ciliata, new species 360 



spinosa, new species 361 



(Tetilla) Cinachyrella, new subgenus 363 



(Cinachyrella) hirsuta Dendy 363 



(Cinachyrella) clavigera (Hentschel) 365 



(Cinachyrella) crustata, new species 367 



(Cinachyrella) crustata, forma hispida, new form 370 



(Cinachyrella) crustata, var. aperta, new variety 371 



(Cinachyrella) crustata, var. patellae-spinosae, new 



variety 373 



(Cinachyrella) paterifera, new species 375 



Craniella O. Schmidt 377 



C. simillima (Bowerbank) 378 



Paratetilla Dendy 380 



arcifera, new species 380 



Cinachyra Sollas 383 



Amphitethya Lendenfeld 384 



Fangophilina O. Schmidt 385 



(Tethyopsilla Lendenfeld) 385 



Craniellopsis Topsent 385 



Halichondrina 385 



Family Haploscleridae 386 



Subfamily Gelliinae 386 



Gellius Gray 387 



varius (Bowerbank), var. fibrosa, new variety 388 



angulatus (Bowerbank), var. vasiformis, new 



variety 390 



