| OCR Text |
Show 1867.] DR. J. E. GRAY O N SPONGES. 551 the rays. Spicules of ovisacs birotate ; rotulse crenated; shaft spinose, often rudimentary. 1. DOSILIA PLUMOSA. B.M. Spongilla plumosa, Carter, I. c. xii. p. 5, t. 1. f. 2; Bowerb. B. S. f. 168-171, 208-212; P. Z. S. 1863, t. 38. f. 5. Hab. Bombay. 2. DOSILIA BAILEYI. Spongilla baileyi, Bowerb. P. Z. S. 1863, t. 38. f. 6. Hab. United States, North America. See also Bowerb. B. S. f. 241. II. The ovisacs tessellated on the surface, armed with fusiform spicules arranged parallel to and beneath the outer surface of the sac; disk with a central boss or imperfectly developed irregular subbirotate spicules on the inner surface of the sac. 3. METANIA. Sponge ? Spicules fusiform, smooth, curved. Outer spicules of ovisac like those of the skeleton, smooth or spinulose. Spicules of parietes birotate; shaft short, smooth, or spinose, stout; rotulse equal, subequal, or very unequal. * Shaft of birotate spicula smooth. 1. METANIA GREGARIA. Spongilla gregaria, Bowerb. B. S. f. 206, 213-216 ; P. Z. S. 1863, t. 38. f. 7 (disk of ovisac-spines equal). Hab. River Amazons. 2. METANIA PAULATA. Spongilla paulata, Bowerb. B. S. f. 221, 222. Hab. Brazil. ** Shaft of birotate spicula spinose. 3. METANIA RETICULATA. Spongilla reticulata, Bowerb. ib. i. p. 38, f. 223, 322, 323 ; P. Z. S. 1863, t. 38. f. 9. Hab. Brazil. 4. ACALLE. Sponge-spicules fusiform, smooth. Ovisac-spicules of outer surface equibihamate, hooks four or five, recurved, large; of wall birotate, rotulse very unequal, inner one rudimentary, shaft very slender. |
