Parvamussium octodecimliratum Melvill & Standen, 1907
MELVILL, J. C. & R. STANDEN. 1907. The marine Mollusca of the Scottish national Antarctic expedition I. Transactions of the Royal Society of Edinburgh, 46 (5): 119-157, 1 pl. unnumbered. [p. 147, pl. 46, figs. 17, 17a]
1907 Amussium [sic] octodecimliratum Melvill & Standen, 1907
J. C. Melvill & R. Standen, 1907, unnumbered plate.
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«A. testa compressa, albo-lactea, subpellucida, tenui, rotunda, feré aequilaterali, inaequivalvi, valvis diversé sculptis, dextra pulcherrimé cancellata, striis multis erectis concentricé radiantibus, simul ac arctissimé longitudinaliter striatula, interstitiis quadratulis, valva sinistra delicaté et arctissimé concentricé striata, auriculis utrimque feré aequalibus, tenuisculptis, umbonibus ambobus acutis, subprominulis, pagina interna alba, nitida, liris in valvâ utraque octodecim, ad margines extensis, praedita.
Alt. 9, lat. 11, diam. 2.5 mm. Hab.— Station 291, lat. 67° 33' S., long. 36° 35' W., trawl, 2500 fathoms.
A very thin, milky-white, delicately papyraceous Amussium, the valves almost equilateral, slightly unequal, auricles subequal, straight, finely sculptured; the left valve beautifully concentrically radiately striate, the striae very close and fine; and the right with finely cancellate upright striae, with quadrate interstices. Within, each valve exhibits an equal number of strong lirations, say 18, whence the specific name.» JAMES COSMO MELVILL & ROBERT STANDEN, 1907
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