. Bulletin - United States National Museum. Science. Fig. 128.—Schizomavella Canu and Bassler, 1917 A, B. S. cornuta, new species. Opercula, X85, showing variations. C. S. ambita granulosa, new variety. Operculum X85. D, E. S. simplex, new species. Operculum X85 and another example highly magnified. decorated with a very small median carina and a large circular area, and closed by the operculum. Measurements.— Apertura!^ =0-12 mm' Zooeciajf* -°'^™ mm' \la = mm. \lz = mm. Affinities.—The small median avicularium is lacking sometimes; it is then replaced by a large spathulate avicul
. Bulletin - United States National Museum. Science. Fig. 128.—Schizomavella Canu and Bassler, 1917 A, B. S. cornuta, new species. Opercula, X85, showing variations. C. S. ambita granulosa, new variety. Operculum X85. D, E. S. simplex, new species. Operculum X85 and another example highly magnified. decorated with a very small median carina and a large circular area, and closed by the operculum. Measurements.— Apertura!^ =0-12 mm' Zooeciajf* -°'^™ mm' \la = mm. \lz = mm. Affinities.—The small median avicularium is lacking sometimes; it is then replaced by a large spathulate avicularium arranged later- ally. The operculum is fragile. This species differs from Schizomavella auriculata Hassall, 1842, in its broader and shallow rimule and in its triangular instead of pori- form avicularium. It differs from Schizomavella linearis Hassall, 1841, in the presence of a median avicularium, in its suborbicular operculum of quite different form and in the absence of small lateral avicularia. The arrangement of the zooecia in linear series is general in this genus; it appears to form a secondary, generic characteristic more constant than the arrangement of the avicularia. Biology.—Our specimens were living. They were in reproduction and fixation in November, 1904, and February, 1908. This species is. 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: 1449px × 1725px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
