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Page 72 THE FESTIVUS Vol. XXXIX: Supplement
Plate 1
Figure 1a Acar gradata (Broderip & Sowerby, 1829).
Île Clipperton, (10°17’17”N, 109°12’01”W), live, attached with byssus to underside of dead Porites sp., 15 m (50
ft), H 2 O 83°F, leg. K.L. Kaiser (ICF-15-94), diving from M/V Royal Star, 19 Apr. 1994. KLK Coll. 201221. Size:
20.2 mm. Photograph by P. Sadeghian.
Figures 1b, 1c Acar gradata (Broderip & Sowerby, 1829).
Île Clipperton, (10°17’09”N, 109°14’00”W) SW side, beach terrace, live, H 2 O 83-84°F, leg. H.W. Chaney, diving
from M/V Royal Star, 17 Apr. 1994, intertidal to 1 m, reef terrace, under rubble. SBMNH 353524. Size: 21.1 mm.
Photographs by P. Sadeghian.
Figures 2a, 2b Barbatia reeveana (d’Orbigny, 1846).
Île Clipperton, (10°17.490’N, 109°13.566’W) S side, single valve, turnable dead coral in sand, SCUBA, 15-51 m
(50-167 ft), H 2 O 80-82°F, leg. K.L. Kaiser (ICF-021-05), Jean-Louis Etienne Expedition, 27 Jan. 2005. KLK Coll.
210382. Size: 13.0 mm. Photographs by P. Sadeghian.
Figures 3a, 3b Barbatia sp. 1.
Île Clipperton, (10°17’04”N, 109°12’46”W) S-SE side, live, attached with byssus in crevices on underside of dead
coral head, 18 m (60 ft), H 2 O 84°F, leg. K.L. Kaiser (ICF-6-98), diving from R/V Urracá, 21 Apr.- 5 May 1998.
KLK Coll. 201229. Size: 4.5 mm (SEMs by D. L. Geiger). Byssus showing in image 3b.
Figure 4 Barbatia sp. 1.
Île Clipperton, (10°18’06”N, 109°14’08”W), right valve, shakings of dead coral, 12-15 m (40-50 ft), H 2 O 83°F, leg.
K.L. Kaiser (ICF-17-94), diving from M/V Royal Star, 19 Apr. 1994. KLK Coll. 201232. Size: 4.6 mm (SEM by D.
L. Geiger).