PROC. BIOL. SOC. WASH. 101(3), 1988, pp. 676-681 NEOPILINA GOESI, A NEW CARIBBEAN MONOPLACOPHORAN MOLLUSK DREDGED IN 1869 Anders Waren Abstract.— K new monoplacophoran species, Neopilina goesi, dredged NW of the Virgin Islands, from the upper part of the continental slope, is described. This new species resembles A^. oligotropha Rokop and A^. zografi (Dautzenberg & Fischer), but has a more marginal apex than the former and a finer sculpture than the latter species. Axel Theodor Goes (1835-1897) was a Swedish physician and zoologist whose main zoological interest was Foraminifera. Dur-ing 1862-1870 he was employed at the gar-rison at St. Barthelemy, Leeward Islands, then a Swedish colony. In 1866 and 1869 Goes dredged around St. Barthelemy at depths down to 400 fathoms (720 m). This yielded rich material of different groups of animals. A very brief description of the dredgings was given by Goes (1 882:8). These collections were given to the Swedish Mu-seum of Natural History in 1870 (Theel 1916:205) and formed the base for several reports on Caribbean invertebrates. The molluscs, however, were only roughly sort-ed to species by N. Odhner and never pub-lished upon, although he labelled many species with manuscript names. A consid-erable part of the molluscan species col-lected by Goes is undescribed and will prob-ably remain so until better material becomes available, because most of it consists of bro-ken juveniles extracted from shell gravel. The monoplacophoran, here described as a new species, had been labelled ""Acmea sp., " by Odhner, an irony of fate, as it was Odhner who named the class Monoplacophora {in Wenz 1940; not Wenz in Knight 1952, as often is quoted). Neopilina Lemche, 1957 Neopilina goesi, new species Figs. 1-3, 6-1 1 Type material. —Holotype, Swedish Mu-seum of Natural History type collection no. 3635a, the shell figured in Figs. 2, 6, 7. Para-type, type collection no. 3635b, the shell figured in Figs. 1, 3, 8-1 1. Type locality. —"'Win&ward off the east-em keys of the Virgin Islands, 200-300 fath-oms (360-540 m)," upper continental slope of the western Caribbean. Distribution. —Known only from the type locality and type material. Description. —Shell very small, colorless, fragile, regularly ovate and depressed, with apex reaching slightly outside margin. Api-cal region consisting of central part without sculpture, but rather rough and with signs of wear, 0.13 x 0.16 mm (Figs. 3, 6); sur-rounded by smooth area, diameter 0.3 mm, sculptured only by numerous pores or pits and 2 or 3 incomplete anterior concentric ridges. Outside this area more regular sculp-ture of concentric and radial ridges starting, giving surface distinctly reticulated appear-ance, with distinct tubercules at intersec-tions of concentric and radial ridges. Con-centric ridges somewhat more close-set and irregular at edge of shell, but very regular at central part of shell. Shell interior very smooth with no muscle scars visible and only some traces of radial sculpture appar-ent by transparency. Shape regularly convex with apex distinctly overhanging anterior ventral margin. Dimensions: Holotype 1.79 x 1.40 x 0.56 mm. Paratype 1.54 x 1.21 x 0.46 mm. Remarks. —The two specimens are small-er than the maximum dimensions known for any other monoplacophoran species
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