352 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [May 20, 



tz 21. Odostomia excavata, Philippi. 



Rissoa excavata, Phil. Moll. Sic. i. p. 154, t. x. f. 6. 



O. excavata, B. C. iv. p. 158 ; v. p. 213, pi. lxxv. f. 6. 



'Porcupine' Exp. 1870 : Atl. St. Vigo B., 26 ; Med. 55. 



Distribution. Great Britain and Ireland, N. and W. France and 

 Spain, Mediterranean and Adriatic ; 5-600 fms. 



Fossil. Pliocene : Coralline Crag, Italy, and Rhodes. Post- 

 tertiary : Largs, Ayrshire (Landsborough) ; 5-10 ft. 



Rissoa trinodosa of Eayneval, hesides the synonyms given in 

 ' British Conchology.' 



22. Odostomia humboldti, Risso. 



Turbonilla humboldti, Kisso, Hist. Nat., de l'Eur. mer. 1826, t. iv. 

 (Suppl.) p. 394, f. G3. 



'Porcupine ' Exp. 1870 : Atl. St. Tangier B. ; Med. 50, 50a, off 

 Jijeli, G. Tunis. 



Distribution. Mediterranean and Adriatic (Risso, Stossich, and 

 others), Madeira (Watson) ; 15-120 fms. 



Fossil. Miocene : Vienna and Bordeaux Basins. Pliocene : Nice 

 and Italy. Post-tertiary : Leghorn and Pozzuoli. 



There are several obsolete and useless synonyms. 



O. humboldti has a tooth-like fold on the pillar, placed differently 

 from that in Menestho and Actceon or Tornatella, to which genera 

 this species has been assigned by some conchologists. 



(, 23. Odostomia decussata, Montagu. 



Turbo decussatus, Mont. Test. Br. (ii.) p. 322, t. 12, f. 4. 



O. decussata, B. C. iv. p. 145 ; v. p. 212, pi. lxxiv. f. 8. 



' Porcupine' Exp. 1870 : Atl. St. Vigo B., 36. , 



Distribution. Shetland to Guernsey, N. and W. France, Algiers, 

 and Sicily ; 12-70 fms. 



Fossil. Pliocene : Coralline Crag, Monte Mario, and Sicily. 



Helix arenaria of Maton and Rackett, 1 Pyramis spirolinus of 

 Brown. 



i/ 2-4. Odostomia eximia, Jeffreys. 



Rissoa eximia, Jeffr. in Ann. & Mag. N. H. new ser. iv. p. 299. 

 O. eximia, B. C. iv. p. 155 ; v. p. 213, pi. lxxv. f. 4. 

 ' Lightning ' Exp. St. 2, 5. 

 ' Porcupine ' Exp. 1869: 23a. 



Distribution. Vadso and Hammerfest to Shetland and the Minch 

 in Ross-shire ; 10-100 fms. 



Fossil. Post-tertiary: Christiania (Sars) ; 100 ft. 

 Not Turbonilla eximia of A. Adams from Japan. 



25. Odostomia spiralis, Montagu. 



Turbo spiralis, Mont. Test. Br. (ii.) p. 323, t. 12, f. 9. 



O. spiralis, B. C. iv. p. 154, pi. ii. f. 5 ; v. p. 213, pi. lxxv. f. 3. 



' Porcupine' Exp. 1870 : Atl. St. 3, Vigo B. ; Med. 50. 



