. Bulletin - United States National Museum. Science. yia. 153. P. Tar. Cuoperi. or so wide, and apparently miles in length, where the surface was thickly strewn with bleached shells, as though an army of these mol- lusks had been overtaken on the march by universal ; Jaw (strigosa) long, low, slightly arcuate; anterior surface smooth excepting near the lower margin, where there are numerous, crowded, subobsolete ribs or coarse strire, crenelating the cutting edge. There is a very strong muscular attachment to the upper margin. The jaw of extreme forms of Cooperi is t
. Bulletin - United States National Museum. Science. yia. 153. P. Tar. Cuoperi. or so wide, and apparently miles in length, where the surface was thickly strewn with bleached shells, as though an army of these mol- lusks had been overtaken on the march by universal ; Jaw (strigosa) long, low, slightly arcuate; anterior surface smooth excepting near the lower margin, where there are numerous, crowded, subobsolete ribs or coarse strire, crenelating the cutting edge. There is a very strong muscular attachment to the upper margin. The jaw of extreme forms of Cooperi is the same. The lingual dentition of each form is alike, but I figure that of each. In P. strigosa (Terr. Moll., Y, Plate IV, Fig. II) there are 50-1-50 teeth, with 15 perfect laterals; c is an extreme marginal. P. Coopen has (Terr. Moll., Y, Plate lY, Fig. G) 29-1-29 teeth, with 11 perfect laterals,. 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.
Size: 1266px × 1974px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
