Cerion (Multistrophia) lewisi Clench, 1961
"Cerion (Multostrophia) lewisi, new species
Plate 43, fig. 5
Description. Shell cylindrical, rather elongate, rather light in structure, smooth to finely ribbed and rimately perforate. Color a shining reddish brown and irregularly marbled with white. Whorls 10½ to 11, slightly convex, the first 7 whorls forming the tapering apex. Suture well defined. Aperture ovate to subcircular. Lip slightly thickened, narrowly reflected and recurved. Parietal ridge moderately to well developed. Parietal tooth centered and extending backwards for t whorl. Columella tooth formed well within the aperture and extending backward for ½ whorl. Umbilicus small. Sculpture consisting of fine, irregular, axial ribs.
32mm. 12.4 mm. Holotype
32 12.5 Paratype
30.5 11 Paratype
29.5 11 Paratype
Types. The holotype is in the United States National Museum, no. 610286, from Pine Cay, Caicos Islands, Bahama Islands. Paratypes from the same locality are in the Museum of Comparative Zoology, no. 221564, Paul Bartsch collector, July 24,1930.
Remarks. C. lewisi is not closely related to any other species of Cerion in the Turks and Caicos Islands. It appears to be nearest to C. lepidum Clench and Aguayo of Punta de Mulas, Banes, Cuba, the same species which may be ancestral to the C. rubicundum Menke complex on Great Inagua. It is to be noted that this species is limited to the northwestern cays of the Caicos Islands.
It is quite possible that all species in the subgenus Multotrophia are derivatives of C. lepidum from Cuba. In general, the species in this subgenus are rather light in structure, most are finely ribbed or smooth, and in the Bahamas occur on the western sides of the large islands or the western cays of the small island groups.Specimens examined
. CAICOS ISLANDS: Pine Cay; Parrot Cay; Water Cay; Fort George Cay; Burnets Bay, West Caicos; Southeast Point, Providenciales; Sugarloaf Hill, Providenciales (all USNM). " (Clench, 1961:255-256)