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Show 114 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [Feb. 19, and stouter shell and has much coarser sculpture. Philippi's figure represents quite another species, and he describes the outer hp as thickened and grooved within. 8. RISSOA LANCLS:, Calcara. B. lancice, Calc. Moll. viv. e foss. Sicilia, 1845, p. 29, t. 4. f. 12. R. nhilippiana, Jeffr. in Ann. & Mag. N. H. 1856, p. 182, pi. 11. f. 4, 5. 'Porcupine' Exp. 1870: Med. St. Algeciras B., Adventure Bank. Distribution. Mediterranean and Adriatic ; var. Alvania tessellata, (Schwartz v. Mohrenslern) ; Algiers (Weinkauffi) ; 8-10 fms. Although Calcara's description is too short and does not give all the characters, it sufficiently agrees with mine, and I therefore adopt his name, which is prior in date. 9. RISSOA CANARIENSIS, d'Orbigny. R. canariensis, d'Orb. Moll. Can. 1837, p. 78, pi. vi. f. 5-7. ' Porcupine' Exp. 1870 : Atl. St. 16. A single specimen. Distribution. Mediterranean from the Gulf of Marseilles to Sicily, Canaries, and Madeira ; 0-120 fms. Fossil. Miocene : Madeira (Mayer). 10. RISSOA PUNCTURA, Montagu. Turbo punctura, Mont. Test. Brit. p. 320, t. 12. f. 5. B. punctura, B. C. iv. p. 17 ; v. p. 207, pi. lxvi. f. 8. 'Porcupine' Exp. 1869: St. 18. 1870: Atl. 3a, Vigo B., 36, Tangier B. (var.) ; Med. 50, Adventure Bank. The Tangier specimens are smaller and slender, with more delicate sculpture. Distribution. Finmark and Faroe Isles to the Mediterranean and Adriatic, Canaries (McAndrew) ; 0-130 fms. Fossil. Pliocene: Coralline Crag, S.W. France, Italy, Rhodes. Post-tertiary : Scandinavia, Ayrshire, Portrush, Selsea; 0-100 ft. There are some obscure and obsolete synonyms. 11. RISSOA PARVULA1, Jeffreys. (Plate IX. fig. 2.) S H E L L oblong, comparatively solid, semitransparent, nearly lustreless : sculpture consisting of about 20 longitudinal and somewhat curved riblets on the body-whorl, which are not continued much below the periphery ; each of the two succeeding whorls has 14 to 16 similar riblets ; all of these are crossed by spiral riblets or striae, of which there are about 10 on the body-whorl and 4 to 6 on the penultimate and next whorls ; the topmost whorl is encircled by microscopic lines ; the intercrossing of the longitudinal and spiral riblets does not form tubercles or prickles at the points of junction; the interstices are square: colour pale yellowish : spire rather slender: whorls 4, slightly convex, the last occupying two thirds of the spire ; apex blunt: suture distinct, but not deep: mouth metre round than 1 Very small. |