Report on the zoological collections made in the Indo-Pacific Ocean ...

74 COLLECTIONS FROM MELANESIA.have a somewhat radiating disposition on the spire. Eoth speciineushave a series of small patches around tlie periphery of the bodywhorland a second below it on the under surface. They are considerablysmaller than those described by Pischer, but may not befull-grown ; this is probably the case, as the umbilicus is moreopen than in the shells from Lifu. The whorls also exhibit little orno trace of an angle above the middle.94, Trochus (Monodonta) labio.Linn., Pkilipjn in Kiister^s Cun.-Cah. p. 166, pi. 27. figs. 1-3, & pi. 44.fig. 8. .Hah. West Island, Prince of Wales Channel, Torres Straits {Coppinger); Daruley Island (Brazier).95. Trochus (Labio) zebra, Menhe.Hah. Port Jackson (Coppinger Sf Angas).This species is the T. tceniatus of Quoy & Gaimard, 1S34 (notT. tceniatus, Wood, 1828), and Lahio porcata of A. Adams is only aslight variety.Philippi (Con.-Cab. p. 160) is inclined to consider T. zehra merelya variation of T. constrictus, and possibly he is correct ; still I thinkfurther evidence is requisite in order to place this supposition beyonda doubt.Specimens of this species are in the British Museum from N.E.Australia, Port Jackson, Port Phillip, Tasmania, and New Zealand.96. Trochus (Perrinia) elisus.Trochus elisus, Gould, ProcBost. Soc. Nat. Hist. 1840, vol. iii p. 92 ;Otia Conch, p. 57 ;Wilkes, Explor. Exped. Moll. p. 178, Atlas,pi. 13. figs. 216-216 c.Thalotia elisa, Goidd, Otia, p. 245.Hah. Port MoUe, Queensland, 12-20 fms. {Coppinger); Singapore(Gould) ; Island of Capul, Philippines, on the reefs at low water(Cuming).The two specimens of this beautiful species from Port Molle arepeculiar in having four spiral lira; instead of three upon the upperwhorls, and those beneath the periphery of the last rather finer thanin the Philippine examples. The deep suture and the character ofthe sculpture rather suggest Perrinia than Thalotia as the sectionfor this species.97. Trochus (Euchelus) atratus.Turbo atratus, Gmelin, Syst. Nat. p. 3601.Trochus atratus, Philippi, Conch.- Cah. p. 174, pi. 27. fig. 14.^Monodonta canaliculata, Lamarck, An. s. Vert. no. 20 ; Dekssert,Pecueil, pi. 37. fig. 1; Quay Sf Gaimard, Voy. Astrvlahe, pi. 64.figs. 21-25 (as Trochus).