OCR Text |
Show 126 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [Feb. 19, 37. RISSOA SUBSTRIATA, Philippi. R. substriata, Phil. Moll. Sic. ii. p. 132, t. xxiii. f. 20. 'Porcupine'Exp. 1870: Atl. St. 27, 28, 30, 36, Tangier B.; Med. 50. Distribution. G. Lyons (Martin, f. Monterosato), and Marseilles (Marion). Fossil. Pliocene: Tuscany (de Stefani), Calabria (Tiberi), and Sicily (Philippi and Monterosato). Some specimens have the outer lip thickened by a slight rib. Philippi says, " labrum simplex." The spiral striae are occasionally stronger than the longitudinal striae ; and in such cases there is no regular reticulation, as described by him. 38. RISSOA SOLUTA, Philippi. R. soluta, Phil. Moll. Sic. ii. p. 130, t. xxiii. f. 18 : B. C iv. p. 45 ; v. p. 208, pi. lxviii. f. 7. 'Lightning' Exp. St. 4. ' Porcupine ' Exp. 1870 : Atl. St. Vigo B., 26, Tangier B.; Med. Adventure Bank. Distribution. Finmark to the Archipelago and Adriatic; 20-300 fms. Fossil. Pliocene : Central and Southern Italy. Post-tertiary : Norway, Rhodes ; 0-100 ft. Cantraine described the mouth of his R. obtusa as " obliqua," and the peristome as " continuo " ; and neither he nor Philippi noticed the spiral striae or the umbilical chink. His description, therefore, is not quite applicable to the present species ; and I still think tbe name given by Philippi should be retained, especially as the latter illustrated his description by a figure. 39. RISSOA TURGIDA, Jeffreys. R. turgida, Jeffr. in Ann. & Mag. Nat. Hist. 1870, p. 8: G. O. Sars, Moll. arct. Norv. p. 183, t. 10. f. 12, a-b. ' Porcupine' Exp. 1870 : Atl. St. 3, 6, 27, 28, 34. Distribution. North Cape to Christianiafiord, Bay of Biscay ('Travailleur' Exp. 1882), N e w England (Verrill); 100-187 fms. Fossil. Pliocene : Sicily (Monterosato and Seguenza). The slight ridge or line which encircles the periphery is less distinct in some than in other specimens. 40. RISSOA SEMISTRIATA, Montagu. Turbo semistriatus, Mont. Test. Br. Suppl. p. 136. R. semistriata, B. C. iv. p. 46 ; v. p. 208, pi. lxviii. f. 8. ' Lightning' Exp. St. 4. 'Porcupine' Exp. 1870 : Atl. Vigo B., 36. Distribution. Norway, Faroe Isles, Denmark, Great Britain and Ireland, northern and western coasts of France and Spain, Mediter- |