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Show 586 DR. R. V O N L E N D E N F E L D O N T H E SYSTEMATIC [Dec. 21, 8. Group Euchalinince, Lendenfeld. Slender, regularly digitate forms with a fine-meshed network and slender spicules. Chalina, auctorum, and Dactylochalina, Euchalina, Euchalinopsis, and Chalinodendron, Lendenfeld. 3. Familia HETERORHAPHID^E, Ridley and Dendy. Megasclera of various forms; microsclera commonly present, but never chelae. Marine sponges, without gemmulae. 1. Subfamilia Phloeodictyinee, Carter. Sponge divisible into body and fistulae, with a strong spicular rind. Megasclera oxea or strongyla ; microsclera (when present) sigmata. Rhizochalina, Schmidt; Oceanapia, Norman. 2. Subfamilia Gelliince, Ridley and Dendy. Megasclera oxea or strongyla. Microsclera always present, viz. sigmata. No rind or fistulae. Gellius, Gray ; Gelliodes, Ridley. 3. Subfamilia Tedaniince, Ridley and Dendy. Megasclera of two forms: monactinal, styli, forming the main skeleton ; and diactinal, tylota. Microsclera long, hair-like trichites. Tedania, Gray ; Trachytedania, Ridley. 4. Subfamilia Desmacellina, Ridley and Dendy. Megasclera styli to tylostyli. Microsclera sigmata or toxia, or both. Desmacella, Schmidt. 5. Subfamilia Hamacanthina?, Ridley and Dendy. Megasclera oxea or styli; microsclera diankistra, to which others may be added. Hamacantha, Gray ; Vomerula, Schmidt. 4. Familia DESMACIDONID.E, Vosmaer, auct. Megasclera of various forms. Microsclera chelae, to which others may be added. 1. Subfamilia Esperellince, Ridley and Dendy. Fibre not echinated by laterally projecting spicules. Esperia, Nardo ; Esperella, Vosmaer ; Esperiopsis, Carter; Cla-dorhiza, Sars; Axoniderma, Ridley and Dendy; Chondrocladia, Wyv. Thomson; Desmacidon, Bowerbank; Homceodictya, Artemi-sina, Vosmaer; Phelloderma, Ridley and Dendy; Sideroderma, Ridley and Dendy ; Iophon, Gray ; Amphilectus, Vosmaer ; Melonanchora, Carter; Guitarra, Carter. |