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Show 1884.] 'LIGHTNING'AND'PORCUPINE' EXPEDITIONS. 355 ' Porcupine ' Exp. 1870 : Atl. St. Tangier B. Two specimens. Distribution. Algiers, a fragment (Joly, f. Monterosato), Palermo, a fragment (Monterosato) ; 1 63| fms. This species differs from O. indistincta in having fewer and larger ribs with more numerous and much finer spiral stria?; the whorls are not so convex, and the suture is consequently slighter or shallower. But I must admit that it is not a satisfactory and well-established species. 30. ODOSTOMIA FLEXUOSA1, Jeffreys. (Plate XXVI. fig. 10.) S H E L L oblong, rather thin, semitransparent, and glossy : sculpture' sharp and flexuous longitudinal ribs, of which there are about 20 on the last whorl and 15 on the next or penultimate whorl ; these commence in a nodose and abrupt manner from just below the suture, and almost disappear at the periphery, where they are crossed by a few spiral striae : colour white: spire turreted; apex truncated : whorls 5, compressed ; the last occupies more than half the shell with the mouth placed upwards: suture narrow but distinct, nearly straight: mouth oval, inflected above and rounded below : outer lip angular above and gently curved in the middle: inner lip filmy on the upper part and reflected on the lower part of the pillar, behind which is a small and narrow chink. L.0'1. B. 0*05. 'Porcupine' Exp. 1870: Med. St. 55. Two specimens. 31. ODOSTOMIA CLATHRATA, Jeffreys. O. clathrata, Jeffr. in Ann. & Mag. N. H. 2nd ser. ii. p. 345 : B. C. iv. p. 148; v. p. 212, pi. lxxiv. f. 9. 'Porcupine' Exp. 1870: Med. St. Adventure Bank (fragment). Distribution. Birterbuy B., Connemara (Barlee and J. G. J.), throughout the Mediterranean and Adriatic, Madeira (Watson), Canaries (McAndrew) ; 20-25 fms. Fossil. Miocene: Vienna Basin (Coll. Homes in mus. Vind.)! Pliocene : Monte Mario and Sicily. 32. ODOSTOMIA SCALARIS, Philippi. Melania (afterwards Chemnitzia) scalaris, Phil. Moll. Sic. i. p. 157, t ix f 9. ' 6. scalaris, B. C. iv. p. 160; v. p. 213, pi. lxxv. f. 7, and var. •Porcupine' Exp. 1870: Atl. St. Vigo B.; Med. 45, Rasel Amoush. All typical specimens _ Distribution. Typical form : Norway (McAndrew), Unst, in Shetland (J. G. J.), western and southern coasts of England and Ireland northern and western coasts of France, Spain and Portugal, Mediterranean and Adriatic, Madeira; 8-108 fms. Var. rufescens. Finmark southwards to the Hebrides and county Antrim ; 10-90 ^Fossil Pliocene: Coralline Crag and Italy. Post-tertiary: M '(var rufescens); 70-100 feet. Not Odontostoma scalaris of SandTerger from the Mayence Basin. 1 Having flexuous ribs. |