126 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [Feb. 19, 



V 37. RissoA sunsTRiATA, Philippi. 



n. 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 



{Mario7i). 



Fossil. Pliocene: Tuscany {de Stefani), Calabria (Tiberi), and 

 Sicily (Philippi and Monterosato') . 



Some specimens have the outer lip thickened by a sHght rib. 

 PhiUppi 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. 



v^ 38. RissoA soLUTA, Philippi. 



B. soluta, Phil. Moll. Sic. ii. p. 130, t. xxiii. f. 18 : B. C. iv. 

 p. 45 ; V. p. 208, pi. Ixviii. 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. Phocene : Central and Southern Italy. Post-tertiary : 

 Norway, Rhodes ; 0-100 ft. 



Cantraine described the mouth of his ii. obtusa as "obliqua," 

 and the peristome as " continuo " ; and neither he nor Pliilippi 

 noticed the spiral striae or the umbihcal 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. 



1/ 39. RissoA TTJRGiDA, 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 {Verrlll); 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. RlSSOA SEMISTRIATA, MoutagU. 



Turbo semistriatus, Mont. Test. Br. Suppl. p. 136. 

 R. semistriata, B. C. iv. p. 46 ; v. p. 208, pi. Ixviii. 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- 



