Pecten landsburgi Forbes in J. Smith, 1839
SMITH, J. 1839. On the last changes in the relative levels of the land and sea in the British Islands. Memoirs of the Wernerian Natural History Society, 8: 49-113. [p. 106, pl. 2, fig. 2]
«2. PECTEN LANDSBURGI. N. S.— Smith.
P. testa subaequivalvi, suborbiculari, radiis minimis longitudinaliter rugoso-striatis, striis transversis regulariter undulatis, auriculus inaequalibus. Lon. ½ un. Lat. 5/12 un.
A very beautiful species, allied to Pecten obsoletus, first observed by the Rev. Mr Landsborough, on the coast of Ayrshire, afterwards dredged by Mr Smith, off the coast of Bute. In colour it resembles Pecten obsoletus, but is somewhat more triangular in form; from that species, however, it is easily distinguished by the lineations of its surface, which is adorned by numerous regular minute rays rugosely striated, and crossed by regular undulated transverse somewhat distant striae. The rays on the upper surface are furnished with short broad obtuse spines, crowning the convex flexure of the undulated striae; the spines only exist towards the margin on the lower valve. The rugose appearance of the longitudinal striae is caused by the interstices being punctate. Fig. 2.* represents a portion of the surface magnified.— F.» EDWARD FORBES IN JAMES SMITH, 1839
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J. Smith, 1839, plate 2.
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