. Bulletin - United States National Museum. Science. PACIFIC TUXICATA OF NATIONAL MUSEUM 63. Figure 20.—a-c, Didemnum (Didemnum) candidum (Savigny); a, common cloacal aperture fringed with lobules, Hawaiian colony; b, patterns made by pigmentless areas around branchial apertures, Palau specimen; c, spicule from colony from the Palau Islands, X 1800. d, Dide7?inum {Didemnum) moseleyi (Herdman): colony heavily pigmented dark brown, common cloacal apertures well defined on white hypoabdominal layer, Palau Islands, sta. 134. e, /, Didemnum {Didemnum) moseleyi f. granulatum Tokioka; e, cloacal
. Bulletin - United States National Museum. Science. PACIFIC TUXICATA OF NATIONAL MUSEUM 63. Figure 20.—a-c, Didemnum (Didemnum) candidum (Savigny); a, common cloacal aperture fringed with lobules, Hawaiian colony; b, patterns made by pigmentless areas around branchial apertures, Palau specimen; c, spicule from colony from the Palau Islands, X 1800. d, Dide7?inum {Didemnum) moseleyi (Herdman): colony heavily pigmented dark brown, common cloacal apertures well defined on white hypoabdominal layer, Palau Islands, sta. 134. e, /, Didemnum {Didemnum) moseleyi f. granulatum Tokioka; e, cloacal aperture supported by riblike structures made of spicules;/, spicule from colony from sta. 220, X 1800. Galapagos Islands were examined. The largest specimen in (lie collec- tion is 40 nnii. in extent; thickness usually 1 nun., but some- times up to 2 mm. around the periphery or in some parts of the colonies. The animal encrusts reef corals, brown algae, the carapaces of crabs, or the surface of solitary ascidians (, Polycavpa crypto- carpa^ as in the present material). They are usually irregularly lobed and, as a whole, the surface is smooth, though it may be depressed slightly at the branchial aperture of each zooid or, contrastingly, slightly elevated above strongly contracted zooids so that it assumes a rough appearance as seen in one of the specimens from Palau. Gen- erally, the superficial spicide-free layer is extremely thin or practically. 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 United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
