. Bulletin - United States National Museum. Science. GEOLOGY AND PALEONTOLOGY OP THE CANAL ZONE. Ill genus, fossil or living. It is striking that this great size of the lunule, a progressive character, should be associated with small and shallow ambulacral notches which, for the genus, is a relatively primitive character. The ambulacral petals are beautifully distinct and well preserved for part of their extent in the type and one other specimen. The. Pig. 3.—a, Encope megatrema. Holotype, natuhal size. The area showing part op ambulacrum ii is drawn from a feagment. restorations are indicated
. Bulletin - United States National Museum. Science. GEOLOGY AND PALEONTOLOGY OP THE CANAL ZONE. Ill genus, fossil or living. It is striking that this great size of the lunule, a progressive character, should be associated with small and shallow ambulacral notches which, for the genus, is a relatively primitive character. The ambulacral petals are beautifully distinct and well preserved for part of their extent in the type and one other specimen. The. Pig. 3.—a, Encope megatrema. Holotype, natuhal size. The area showing part op ambulacrum ii is drawn from a feagment. restorations are indicated by dotted lines. 1), Section of lunule to show the inclined faces, drawn from two fragments. posterior pair, I and V, are long and narrow with a relatively wide poriferous area and narrow median interporiferous area. The width of the petal of ambulacrum V is 11 mm. and its length is 50 mm. It extends posteriorly in a wide curve around the lunule of interambu- lacrum 5 and reaches a line coincident with the posterior end 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
