natural, history

197Eustomopsis quercina (Pfeiffer)(Plate 19, fig. 8)Helix quercina PFEIFFER 1856 [1857], Proc. Zool. Soc. London, p. 382, (AdmiraltyIsland); PFEIFFER 1859, Novit. Conch., I: 108, pI. 31, fig. 1-2; PFEIFFER 1859,Mono. Helic;eorum Viven., 4~ 247.Hadra quercina Pfeiffer, ALBERS 1860, Die Heliceen, 2: 165.Helix (Chloritisj quercina Pfeiffer. PILSBRY 1890, Man. of Conch. (2), 6: 257, pI. 37,fig. 48-49.Chloritis quercina Pfeiffer, PILSBRY 1894, Man. of Conch., (2), 9: 121.Chloritis (Su/cobasisj quercina Pfeiffer, GUDE 1906. Proc. Mala. Soc. London, 7:114; CLAPP 1923, Bull. Mus. Compo Zool., 65: 382.Chloritis (Sulcobasisj camaratus DALl 1910, Field Mus. Nat. Hist. Zool., Ser. 7,p. 220, pI. 4, fig. 2-4 (Bougainville Island, Solomon Islands).Remarks. This species is well distributed throughout the islands. It completelyinte rgrades with the subspecies hombroni which is the more common of the twoforms. There is a wide variation in size, not only in specimens from different localitiesbut in material obtained in a single region.C. camaratus Dall appears to be an absolute synonym of C. quercina. Comparison~as made with a paratype in the United States National Museum.Specimens examined. Bougainvilfe: Kieta at 3000 feet. Choiseuf: Bambatana;Choiseul Bay; Luti; headland of the Wurulata River. San Cristobal:mountains at 1000-2000 feet.Eustomo~is quercina form hombroni (Pfeiffer). (Plate 19, fig. 4)He/ixjane/lii 'Homb. & Jacq: ROUSSEAU 1854. Voy. au Pole Sud .. 5: 8, atlas. pI. 4,fig. 15-18, (Solomon Islands); non H.janellei LE GUILLOU 1842. Rev. Zool.. p. 137 1 •Helix homhroni PFEIFFER 1856 [1857], Proc. Zool. Soc. London, p. 382. new name forH.janellii 'H. & J.' ROUSSEAU 1854, non H.jannellei LE GUILLOU 1842: PFEIFFER1859. Novit. Conch., I: III, pI. 31. fig. 9-11; PFEIFFER 1859, Mono. HeliceorumViven., 4: 262; PFEIFFER 1868, ibid. 5: 340; DOHRN 1880. Conchy.-Cab .• I, pt.12, sec. 4, p. 583. pI. 172, fig. 1-4.Helix Janellei. PFEIFFER 1856 [1857], [err. typo = janellii], Proc. Zool. Soc. London,p.382.Hodra hombroni Pfeiffer, ALBERS 1860, Die Heliceen, 1: 165.Helix (Camaellaj hombrOlli Pfeiffer, SMITH 1885. Proc. Zool. Soc. London. p.594;Guppy 1887, The Solomon Islands and Their Natives, London, I: 345.Helix (Chloritisj quercilla var. hombroni Pfeiffer, PILSBRY 1890, Man. of Conch.,(2), 6: 258, pI. 37, fig. 45-47.I. HelilC janellii and H. jannellei are homonyms according to A.rticle 36 in the International Rules.This justifies the use of hombroni for this subspecies.