. Bulletin - United States National Museum. Science. GEOLOGY AND PALEONTOLOGY OP THE CANAL ZONE. 109 central in position, the periproct is elongate oval, its anterior border is 13 mm. posterior to the border of the mouth opening. Poste- riorly the periproct is confluent with the infolded depression of the interambulacral lunule. The ambulacral petals are rather narrow in this specimen, measur- ing 13 mm. in width. The odd anterior ambulacral petal is longer than the others, and measures 36 mm. in length, whereas the pos- terior petals of the trivium measure 28 mm. in length. The petals of the
. Bulletin - United States National Museum. Science. GEOLOGY AND PALEONTOLOGY OP THE CANAL ZONE. 109 central in position, the periproct is elongate oval, its anterior border is 13 mm. posterior to the border of the mouth opening. Poste- riorly the periproct is confluent with the infolded depression of the interambulacral lunule. The ambulacral petals are rather narrow in this specimen, measur- ing 13 mm. in width. The odd anterior ambulacral petal is longer than the others, and measures 36 mm. in length, whereas the pos- terior petals of the trivium measure 28 mm. in length. The petals of the bivium, or I and V, are longer than the posterior pair of the. 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
