VI CONTENTS. 



Tetraxonida— Continued. 



Halichondrina — Continued. Page. 



Family Axinellidae 444 



Axinyssa Lendenfeld 445 



aculeata, new species 445 



Lithistida 447 



Family Theonellidae 447 



Theonella Gray 447 



swinhoei Gray 448 



swinhoei, var. verrucosa, new variety 450 



invaginata, new species 451 



cylindrica, new species 454 



Discodermia Bocage _"_ _ 455 



emarginata Dendy 455 



emarginata, var. lamellaris, new variety 456 



Jereopsis O. Schmidt 457 



f ruticosa, new species 458 



Family Coscinospongiidae 459 



Coscinospongia Bowerbank 460 



thomasi (Sollas) 461 



Family Pleromidae 460 



Costifer, new genus 461 



vasif oralis, new species 461 



Family Scleritodermidae 463 



Aciculites O. Schmidt 463 



ciliata, new species 463 



Family Leiodermatiidae 465 



Leiodermatium O. Schmidt 465 



pfeifferae (Carter) 465 



Appendix to Leiodermatiidae 467 



Taprobane Dendy 468 



herdmani Dendy 468 



Family Neopeltidae 469 



Family Siphonidiidae 469 



Family Vetulinidae 470 



Family Desmanthidae 470 



Lithistida incertae sedis 471 



Brachiaster simplex, new genus and species 471 



Macerated and unidentifiable lithistids 471 



Lophacanthus Hentschel 472 



Keratosa ' ~ - 



Family Darwinellidae !~ ; ! 



Ianthella Gray 473 



flabelliformis ( Pallas) 474 



basta (Pallas) 475 



Family Spongelidae 475 



Spongelia Nardo 476 



fragilis (Montagu), var. fasciculata, new variety 476 



Family Spongidae 470 



Subfamily Eusponginae 179 



Phyllospongia Ehlers 480 



foliascens (Pallas) 180 



aliena, new -pecies 181 



Euspongia Bronn 484 



officinalis (Linnaeus) 484 



irregularis Lendenfeld, var. suriganensis, new variety.. 4S6 



