. Bulletin. Natural history; Natuurlijke historie. SYSTEMATICS 53 Halichondria magniconulosa n. sp. (Text-fig. 11; plate V, fig. 1). 100// Fig. II.—Spicules of Halichondria magniconulosa. Oxeas. YPM 5039. Holotype. HoLOTYPE. YPM 5039. Rasta's Wreck, June 24, 1961. Habitat. Several specimens were found on pilings at Port Royal. Shape. Massive to lobate, reaching a height of as much as 11 cm. Color. The surface and interior of the living sponge is yellow. In alcohol, exposed surfaces become mottled grayish-brown to dark brown. The interior becomes a dull yellow. Consistency. The sponge is tough
. Bulletin. Natural history; Natuurlijke historie. SYSTEMATICS 53 Halichondria magniconulosa n. sp. (Text-fig. 11; plate V, fig. 1). 100// Fig. II.—Spicules of Halichondria magniconulosa. Oxeas. YPM 5039. Holotype. HoLOTYPE. YPM 5039. Rasta's Wreck, June 24, 1961. Habitat. Several specimens were found on pilings at Port Royal. Shape. Massive to lobate, reaching a height of as much as 11 cm. Color. The surface and interior of the living sponge is yellow. In alcohol, exposed surfaces become mottled grayish-brown to dark brown. The interior becomes a dull yellow. Consistency. The sponge is tough and only slightly compressible. Surface. The skin is wrinkled, but smooth to the touch. It can be detached only with difficulty. The surface is frequently thrown into thick, sharp-pointed conules. The conules are 1-7 mm in height, several millimeters in width at the base, and typically about 1 mm in thickness. They may be sparsely scattered or spaced only a few millimeters apart. In the two smaller specimens, the infrequent oscules are 1-3 mm in diameter. The largest specimen has two apical vents, each being 1 cm in diameter. Ectosome. The dermal membrane receives the terminal tufts of radial spicule tracts. It also contains rather sparsely scattered tangential spicules of all sizes. Small spicules are particularly abundant. The dermal pores range in size from 40 x 30-100 x 60 yu,. They are divided into ill-defined groups by bands of flesh which are 15-60 p. in diameter. The spicules within the partitions may be scattered or organized into loose bundles. Some areas of the skin seem to lack pores. Endosome. The interior skeleton includes a feltwork of scattered spicules and also spicule bundles, 30-100 [x in diameter. The well-developed radial tracts end in dermal tufts. Numerous spicule bundles enter each conule. Subdermal spaces are infrequent. Spicules. Oxeas, mostly straight, occasionally slightly curved, 108-369 x 3-7 fi. They may be fusiform or somewhat hastate. Small sp
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Keywords: ., bookcentury1900, bookcollectionbiodiv, booksubjectnaturalhistory
