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Show 1886.] POSITION AND CLASSIFICATION OF SPONGES. 577 2. Subfamilia Uteince, Lendenfeld. With simple unbranched ciliated chambers, the distal'ends of which are imbedded in a continuous cortex. Grantessa, Lendenfeld, Ute, Polejaeff, and Amphoriscus, Polejaeff, and those subgenera of the Syconidae in Hackel's system which terminate with the syllable "usa." 3. Subfamilia Granting, Lendenfeld. With branched ciliated chambers. Grantia, Heteropegma, and Anamixilla, Polejaeff. 5. Familia SYLLEIBID^E, Lendenfeld. With complicated exhalant canals, leading from the cylindrical ciliated chambers into the gastral cavity. 1. Subfamilia Vosmaerina?, Lendenfeld. The ciliated chambers are radially situated, and form a regularly cylindrical zone. They are connected with the gastral cavity by a network of anastomosing exhalant canals. Vosmaeria, Lendenfeld, and Leucetta, Polejaeff. 2. Subfamilia Polejna?, Lendenfeld. The ciliated chambers form a much-folded layer. The exhalant canals are wide, and do not anastomose to form a reticulation. The genera Polejna, Lendenfeld, and Leucilla, Polejaeff, constitute this group. 6. Familia LEUCONIDJE, Hackel. Heteroccela with ramified canal-system and spherical ciliated chambers. Leucetta, Leucissa, Leucaltis, Leucortis, Leuculmis, and Leu-candra, Hackel. Leuconia, auctorum, and Leuconia and Pericharax, Polejaeff. 7. Familia TEICHONID.E, Carter. Heteroccela without gastral cavity. The inhalant pores are situated on the one, and the exhalant on the other side of the lamellar sponge ; with spherical ciliated chambers. Teichonella, Carter, and Eilhardia, Polejaeff. II. Subclassis SILICEA, nov. Sponges with a skeleton composed of siliceous spicules and their derivatives; possessing a horny skeleton or no skeleton at all, but never supported by calcareous spicules. Comprises the Non-Calcarea of Grant and other authors. I. Ordo HEXACTINELLIDA, O. Schmidt. Silicea with triaxon spicules and soft mesoglcea. Strengthened by siliceous cement, generally joining the spicules. P R O C . Z O O L . Soc-1886, No. XXXVIII. 38 |
