Cyclopecten distinctus (E. A. Smith, 1885)
SMITH, E. A. 1885. Report on the Lamellibranchiata collected by H.M.S. Challenger during the years 1873-76. In C. W. Thomson & J. Murray: Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873-1876. Zoology, 13: 1-341, pls. 1-25 [p. 304, pl. 22, figs. 3, 3a]
1885 Pecten distinctus E. A. Smith, 1885
E. A. Smith, 1885, plate 22.
|
«Testa parva, compressa, paulo inaequivalvis, tenuis, subpellucida, haud nitida, sordide albida. Valva dextra parum convexa, concentrice tenuissime lamellato-striata, sinistra paulo convexior, liris concentricis fortioribus instructa, liris radiantibus paucis indistinctis ornata. Auriculae inaequales, definitae, anticis majoribus, illa valvae dextrae radiatim lirata, inferne haud profunde sinuata.
This little species is slightly inequivalve, the left valve being rather deeper than the other. It is compressed, thin, a little transparent, not glossy, of a dirty white colour, and has differently sculptured valves. The right has much finer concentric lirae than the left, and has no radiating lines, which, however, are not particularly conspicuous in the other valve. The umbones are rather acute, the straight or feebly incurved sides forming an apical angle of about 105°. The ears are unequal, the front ones being the larger. That in the right valve is ornamented with six or seven fine lirae, which cover the greater part of the surface, leaving only a narrow plain groove at the moderately deep sinus.
Length 8 mm., height 7½, diameter 2. Habitat.— Off Marion Island, in 100 fathoms. In this species the ears are depressed and well marked off from the rest of the surface.» EDGAR ALBERT SMITH, 1885
|