116 DR. GWYN JEFFREYS ON THE MOLLTJSCA OF THE [Feb. 19, 



same as my variety of R. abyssicoUt, but also satisfied me that the 

 latter was another variety of R. testce, whicli is a much older name 

 than abyssicola. 



Alvania asperula of Bruguone appears to be the young. 



B. Flemingia. Ribbed lengthwise and spirally striated ; 

 outer lip thickened and reflected. 



14. RissoA ZETLANDICA, Montagu. 



Turbo zetlandicm, Muut., in Tr. Liuu. Soc. xi. p. 194, t. xiii. 

 f. 3. 



R. zetlandica, B. C, iv. p. 20 ; v. p. 207, pi. Ixvii. f. 1. 



' Lightning ' Exp. : St. 2, 5. 



' Porcupine ' Exp. 1869: St. 13, 14. 1870: Atl. 2, 3, 13, 16, 

 17«, off C. Sagres, 27, 28 ; Med. Adventure Bank. 



Distribution. Loffoden I. to the Mediterranean and Adriatic ; 

 12-200 fms. 



Fossil. 1 Miocene : Vienna Basin ( Homes), Transylvania {Bauer 

 and Stache), Modena (Manzoni). Pliocene : Coralline and Red 

 Crag, Biot, and Italv. Post-tertiary : Norway (Crosskey and 

 Robertson); 100 ft. 



Among the synonyms are R. carinata of Aradas and R. cana- 

 licnlata of Philippi. This species is probably not the R. zetlandica 

 of Homes, which has a shorter spire and more tumid shape, with 

 stronger and coarser sculpture ; R. scalaris of Dubois comes nearer 

 to our species. R. crispa of Watson, from Madeira, is more closely 

 allied to R. zetlandica. 



^ 15. RissoA COST ATA, Adams. 



Turbo costatus. Ad. in Tr. Linn. Soc. iii. p. 65, t. xiii. f. 13, 14. 



R. costata, B. C. iv. p. 22 ; v. p. 207, pi. Ixviii. f. 2. 



'Porcupine' Exp. 1870; Atl. St. Vigo B., 26, 36; Med. Ad- 

 venture Bank. 



Distribution. Norway, Sweden, Great Britain, and Holland to the 

 Mediterranean and Adriatic, Canaries, and Madeira ; low water 

 at spring-tides to 70 fms. 



FossiL Pliocene : Italy and Rhodes. Post-tertiary : Clyde Beds 

 and Selsea. 



The principal synonyms are R. exigua of Michaucl andii. carinata 

 of Philippi. Not Turbo cos/a<M« of Lamarck, which is R. violacea, 

 nor R. costata of Desmarets, which is R. variabilis of v. Miihlftld. 



Mediterranean and Teueriffe specimens are smaller than northern 

 specimens. 



C. RissOA. Mostly ribbed lengthwise and spirally striated; outer 

 lip usually strengthened by a rib. 



V 16. EissoA MONODONTA, Bivona. 



R. monodonta (Biv.), Phihppi, INIoll. Sic. i. p. 151, t. x. f. 9. 

 'Porcupine' Exp. 1870 : Med. St. Algeciras B. 



