. Bulletin. Natural history; Natuurlijke historie. SYSTEMATICS 71 Sollas (1888) used Cydonium as a genus for geodiids in which the oscules and pores could not be distinguished. Sollas' classification of the family Geodiidae merits recon- sideration. Geodia (Cydonium) papyracea n. sp. (Text-fig. 13; plate VIII, figs. 1, 2). Fig. 13.—Spicules of Geodia papyracea. A. Oxeas. B. Distal end of plagiotriaene. C. Distal end of anatriaene. D. Small spherasters. E. Thick-rayed subcortical oxyaster. F. Oxyaster. G. Sterrasters. H. Surface sculpturing of portions of sterrasters enlarged. A: scale I. B, C:
. Bulletin. Natural history; Natuurlijke historie. SYSTEMATICS 71 Sollas (1888) used Cydonium as a genus for geodiids in which the oscules and pores could not be distinguished. Sollas' classification of the family Geodiidae merits recon- sideration. Geodia (Cydonium) papyracea n. sp. (Text-fig. 13; plate VIII, figs. 1, 2). Fig. 13.—Spicules of Geodia papyracea. A. Oxeas. B. Distal end of plagiotriaene. C. Distal end of anatriaene. D. Small spherasters. E. Thick-rayed subcortical oxyaster. F. Oxyaster. G. Sterrasters. H. Surface sculpturing of portions of sterrasters enlarged. A: scale I. B, C: scale II. D, E, F: scale III. G: scale IV. H: scale V. YPM 5045. Holotype. HoLOTYPE. YPM 5045. Mangrove boat channel, July 13, 1961. Habitat. Common on mangrove roots along the main boat channel. Shape. Massive, often fist-sized. A few specimens attain a diameter of 8-10 cm. Color. The living sponges are off-white to light gray. Purple tinges are sometimes present. Preserved specimens have similar colors. Consistency. Firm to compressible. When pressure is exerted many specimens col- lapse. The cortex is rather brittle. The endosome is pulpy and easily crumbled. Surface. Rough to the touch. The surface may be even, wrinkled, or folded. No macroscopic oscules are present. Considerable areas of the surface have a punctiform appearance. The sponge is hispid as seen under a dissecting microscope at a magnifica- tion of 60 X- EcTOsoME. The cortex is 400-600 ^ in thickness. A thin ectochrote of strongylospheras- ters is pierced by openings which are 35-50 fx in diameter. The openings form the cribriporal roofs of chone canals. A diin lacunar layer separates the ectochrote from the sterrastral crust. The cavities are crossed by broad columns which contain megascleres and a few strongylospherasters. A distinct basal fibrous layer is absent. Numerous thick. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - col
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Keywords: ., bookcentury1900, bookcollectionbiodiv, booksubjectnaturalhistory
