. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. Disk of rays with corona superior (s) at base. 2. Corona superior with two hair scars (h). - 3. Corona inferior. Phylum Chlorophyta Class Ulvophyceae Order Dasycladales Family Polyphysaceae Avrainvillea digitate* unier & mm. Littler Thallus: gregarious, nger- like, occasionally club- shaped or pointed, to 6 cm high, cm diam., dull dark brown-green. Blades loosely woven, spongy; zonation absent; interior and surface siphons strong-walled, 40-55 urn (to 75 urn at growing margins) diam., slightly mon
. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. Disk of rays with corona superior (s) at base. 2. Corona superior with two hair scars (h). - 3. Corona inferior. Phylum Chlorophyta Class Ulvophyceae Order Dasycladales Family Polyphysaceae Avrainvillea digitate* unier & mm. Littler Thallus: gregarious, nger- like, occasionally club- shaped or pointed, to 6 cm high, cm diam., dull dark brown-green. Blades loosely woven, spongy; zonation absent; interior and surface siphons strong-walled, 40-55 urn (to 75 urn at growing margins) diam., slightly moniliform (bead- like), apices bulbous or rounded. Stipe absent. Rhizoidal mass large, prostrate. Common: on carbonate sediments or mangrove peat, growing as large mats in shallow waters (less than 1 m), often interspersed among Thalassia testudinum or at the edges of mangrove islands; deeper forms (greater than 3 m) have narrow uprights with bluntly pointed apices, Puerto Rican specimens have more club- shaped uprights; to 5 m deep. Highborne Cay Distribution: only encountered on the reef at. 1992:379, g. 3. 1. Surface siphons of blade. 2. Habit. Phylum Chlorophyta Class Bryopsidophyceae Order Bryopsidales Family Udoteaceae. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Press; National Research Council (U. S. ). Pacific Science Board; Smithsonian Institution; National Museum of Natural History (U. S. ); United States. Bureau of Sport Fisheries and Wildlife. Washington, D. C. : [Smithsonian Press]
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