. Bulletin of the British Museum (Natural History), Geology. 'ALAEOZOIC ANOMALODESMATA ndividuals of this or a number of other British species. As we ire unable to decide to which of the smoother species they belong, we provisionally reject Phillips' species Cypricardia ?labrata as a nomen dubium. Description. Both the lunule and the escutcheon are defined ?y a distinct carina. The escutcheon is two-thirds of the shell ength and the distance from the umbones to the posterior nargins is five-sixths of the shell length. The dimensions of specimen BM L24545 are: L 42 mm, H 28-5 mm, U-P 35 mm. [Ti
. Bulletin of the British Museum (Natural History), Geology. 'ALAEOZOIC ANOMALODESMATA ndividuals of this or a number of other British species. As we ire unable to decide to which of the smoother species they belong, we provisionally reject Phillips' species Cypricardia ?labrata as a nomen dubium. Description. Both the lunule and the escutcheon are defined ?y a distinct carina. The escutcheon is two-thirds of the shell ength and the distance from the umbones to the posterior nargins is five-sixths of the shell length. The dimensions of specimen BM L24545 are: L 42 mm, H 28-5 mm, U-P 35 mm. [Tie umbones are prosogyral and confluent with a convex lorsum on both valves, whereas Sanguinolites is concave in his area. The ligament nymph is visible in BM L13446 and 3M L13481; it is separated from the dorsal edge of the :scutcheon by a distinct narrow groove, and its dorsal margin ies just below the margin of the escutcheon. The internal surface is visible in BM L47500. The anterior idductor is well impressed into a raised area of the inner shell urface. The pallial line is partly visible in this specimen but is 'ery faint; it does not have a sinus. Two radiating, fine, low ibs are present between the escutcheon and the low radiating ine delimiting the corselet, which distinguishes the species rom Pleurophorella visetensis de Rychkholt (sensu Hind, 900) which has three such ribs. Closely related species which are not thought to be ynonyms are: Sanguinolites striatolamellosus de Koninck, emu Hind (1900: 398; pi. 43, fig. 11 & 11a) (Fig. 39) (non Zypricardinia striatolamellosa de Koninck, 1842: pi. H, fig. ia-c); Isocardia transversa de Koninck (1842: pi. 1, fig. 3a-b); Sanguinolites oblongus Hind (1900: pi. 43, figs 6-7); and >ossibly Sanguinolites visetensis (de Rychholt, 1847) sensu iind (1900: 395; pi. 43, figs 1-4). We consider, however, that Sanguinolites striatogranulatus Hind (1900: 393; pi. 42, figs 6-22) may well be a synonym and the differences in shape nd g
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