126 DR. GWYN JEFFREYS ON THE MOLLTJSCA 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 Lave the outer lip thickened by a slight rib. 

 Philippi says, " labrum simplex." The spiral striee are occasionally 

 stronger than the longitudinal stria? ; and in such cases there is no 

 regular reticulation, as described by him. 



v 38. Rissoa soltjta, 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 the name given by Philippi should be retained, especially as 

 the latter illustrated his description by a figure. 



V 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), New 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- 



