1834.] ' lightning' AND ' porcupine' EXPEDITIONS. 349 



The peculiar habitat of this species is the " ears " of Pecten oper- 

 eularis and P. maxinms. There are several varieties. 



1/ 12. Odostomia nitens. Jeffreys. (Plate XXVI. fig. 5.) 



O. nitens, Jeffr. in Ann. & Mag N. H. July 1870, p. 79. 



' Porcupine ' Exp. 1869: St. 15. 1870: Atl. 3, 8, 9, 27, 28; 

 Med. Adventure Bank. 



Distribution. Palermo (Monterosato), ^gean {Spratt), Adriatic 

 (Brusina), Fayal ('Challenger' Exp.); 130-450 fms. 



Differs from O. (Syrnola) minuta of A. Adams, which is cylin- 

 drical, and has more whorls as well as a golden band encircling the 

 periphery, and a strong tooth. In the present specit-s the tooth is 

 represented by a broad but not conspicuous fold on the pillar. The 

 peristome is entire or continuous ; operculum of a pale yellow colour. 

 It varies greatly in size, from O'lo to 0-075 in length, and pro- 

 portionably in breadth. 



O. erjaveciana of Professor Brusina. 



1/ 13. Odostomia diaphana, Jeffreys. 



O. diaphana, Jeffr. in Ann. & Mag. N. H. 2nd ser. ii. p. 341 : 

 B. Civ. p. 141 ; V. p. 212, pi. Ixxiv. f. 5. 



'Porcupine' Exp. 1870: Med. St. Adventure Bank. A small 

 and slender variety. 



Distribution. B'ergen to the eastern coasts of the Mediterranean 

 and the Adriatic ; 12-80 fms. 



Fossil. Pliocene : Sicily. 



V 14. Odostomia insculpta, Montagu. 



Turbo insculptus, Mont. Test. Br. Suppl. p. 129. 



O. insculpta, B. C. iv. p. 139 ; v. p. 211, pi. Ixxiv. f. 4. 



' Lightning' Exp. St. 4, 5. 



'Porcupine' Exp. 1870: Atl. Vigo B., 26. 



Distribution. Iceland and Lofoten I. to the Bay of Biscay; 10- 



586 fms. 



Fossil. Pliocene : Coralline Crag, Ficarazzi (Brugnone). Post- 

 tertiary : Norway {Croskey and Robertson) ; 0-100 ft. 



Turbonilla obliqua, Loven (ex spec. Orsted}. 



I 15. Odostomia plicata, Montagu. 



Turbo plicatus, Mont. Test. Brit, (ii.) p. 325, t. 21, f. 2. 



O. plicata, B. C. iv. p. 137 ; v. p. 21 1, pi. Ixxiv. f. 3. 



'Porcupine' Exp. 1870: Med. St. Adventure Bank (semi- 

 fossilized). . -^ , . 



Distribution. Bergen {Friele) to Sicily and the Adriatic, Madeira 

 (McAndrew) : 0-120 fms. 



Fossil. Pliocene : Coralline and Red Crag, Biot, and Italy. Post- 

 tertiary : Selsea. Not Odontostoma plicatum of Hiirnes, a Miocene 



fossil . . 



Eulima bulimus of Scacchi, Rissoa elongata of Philippi, O./usulus 

 of Monterosato, and other synonyms. Not O. vitrea of Brusina, as 



Proc. Zool. Soc— 1884, No. XXIV. 24 



