natural, history

Trochomorpha eudora Angas, CLAPP 1923, Bull. Mus. Compo Zool., 65: 365.Trochomorpha hidalgoiana Crosse, CLAPP 1923, Bull. Mus. Compo Zoo!., 65: 368.Remar~s. A species of wide distribution in the Solomon Group. I cannotdifferentiate hidalgoiana Crosse and eudora Angas from zenobia Pfeiffer. All werederived originally from the Island of New Georgia.This is the most coarsely sculptured species of Trochomorpha occurring in theSolomon Islands. The whorls are generally well rounded both above and below thesharply keeled periphery. So far as known, this species is the only one in the Solomonsto extend over several of the larger islands. Most of the species are localized onsingle islands.Specimens examined. San Cristobal: Kira-Kira; Kavo River;Wainoni Bay.Choiseul: Choiseul Bay. Guadalcanal: L 346, west of Honiara. This species hasbeen reported from New Georgia by PFEIFFER, ANGAS, CROSSE and PILSBRY.Trochomorpha florideosis ClappTrochomorpha floridensis CLAPP 1923, Bull. Mus. Compo Zool., 65: 367 (FloridaIsland, Solomon Islands) .. Specimens examined. Rennell: L 364; L 385, L 357, Lavanggu.Trochomorpha meleani, new species(Plate 17, fig. 6)Description. Shell reaching 30 mm in width, subdepressed, carinated and umbilicated.Color a straw-yellow with a subperipheral band of dark brown. Whorls 5 1 / Z to6, convex, the last whorl moderately carinated. Spire depressed, dome-shaped andforming an angle of about 110". Aperture subquadrate with the lip simple and notnoticeably thickened. No columella. Umbilicus wide and deep. being 1/, the greaterdiameter of the shell. Suture moderately indented. Sculpture consisting of numerous,oblique growth lines. Nuclear whorls 11/z and smooth.Height Greater diameter Lesser diameter15 mm 30 mm 25.5 mm Holotype14.5 - 30.4 - 25.5 - Paratype15.5 - 30 25Ty pe S. The holotype is in the American Museum of Natural History no. 79016 from10 miles inland from Su'u, Malaita Island, Solomon Islands, collected by the WhitneyExpedition. Paratypes from the same locality in the American Museum and theMuseum of Comparative Zoology, no. 93070, and from 20 miles inland from Su'u'Malaita Island.Rem ark S. This species is, perhaps, nearest in relationship to T. conCQlIQ Clapp.179