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Show 1884.] 'LIGHTNING'AND'PORCUPINE ' EXPEDITIONS. 351 18. O D O S T O M I A UNIFASCIATA, Forbes. (Plate XXVI. fig. 8.) Eulima unifasciata, Forb. Rep. Mg. Inv. (Rep. Brit. Assoc. 1843), p. 188. 'Porcupine' 1870: Med. St. Adventure Bank. Distribution. Bay of Biscay ('Travailleur' Exp.), throughout the Mediterranean, off the Sahara and Azores (' Talisman' Exp.), New England (Ferrill); 30-1622 fms. Forbes's description is as follows :-"Eulima unifasciata, sp. nov. E. testa turrita, laevigata, polita, alba, fascia fulva cincta: an-fractibus 11 planiusculis; apertura ovata. Long 0 j3^ une Lycia. Reg. viii." This description was evidently intended for the shell which is now figured, although the tooth must have escaped his notice ; this was also the case with several species of Odostomia, described by Philippi as Rissoa. The mouth is angular or sharply pointed above and below. A specimen from the Gulf of Naples, which has a conspicuous band and tooth, shows also a grooved or crenated mouth. It is the Eulimella smithii of Verrill. 19. ODOSTOMIA MINUTA, H. Adams. Syrnola minuta, H. Ad. in P. Z. S. 1869, p. 274, pi. xix. f. 10. 'Porcupine' Exp. 1870: Atl. St. 14, 30; Med. Adventure Bank. Distribution. Bay of Biscay ('Travailleur' Exp. 1882), Mediterranean (Susini, Monterosato, Spratt, ' Shearwater' Exp. and 'Washington' Exp.), Orotava (McAndrew); 54-249 fms. Fossil. Pliocene : Altavilla (Brugnone). O. macella, Brugnone. The operculum is of a pale yellowish colour. The coloured band is not always present. I do not know what character justified the separation of this species as a distinct genus, nor what is meant by the name Syrnola. B. Striated lengthwise or reticulated, and dentated. 20. O D O S T O M I A TRICINCTA, Jeffreys. O. tricincta, Jeffr. in Ann. & Mag. N . H. Febr. 1856, p. 185, pi. ii. f. 12, 13. ' Porcupine ' Exp. 1870 : Med. St. off Rinaldo's Chair. Distribution. N . W . France (Cailliaud), Mediterranean and Adriatic, Canaries (McAndrew), and Madeira (Watson); 25-120 Fossil. Pliocene : Monte Pellegrino, Sicily (Monterosato). Variable in size. It may possibly have been the Rissoa doliolum of Philippi; but his description and figure show no coloured band nor the tooth-like fold on the pillar, and the ribs are fewer in that species. Some specimens of the present species have only two bands. O. tricincta was apparently figured in Savigny's unfinished work, 'Histoire Naturelle de l'Egypte,' 1805-12, but it was never described or even named. 24* |