1831.] ' lightning' AND ' porcupine' EXPEDITIONS. 349 



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

 culars and P. maximus. 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), iEgean (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 species 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 0*15 to - O75 in length, and pro- 

 portionably in breadth. 



O. erjaveciana of Professor Brusina. 



i/ 13. Odostomia diaphana, Jeffreys. 



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

 B. Civ. p. 141 ; v. p. 212, pi. lxxiv. f. 5. 



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

 and slender variety. 



Distribution. Bergen to the eastern coasts of the Mediterranean 

 and the x\driatic ; 12-80 fms. 



Fossil. Pliocene : Sicily. 



- 14. Odostomia insculpta, Montagu. 



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



O. insculpta, B. C. iv. p. 139; v. p. 211, pi. lxxiv. 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 (Groshey and Robertson) ; 0-100 ft. 



Turbonilla obliqua, Loven (ex spec. Orsted). 



15. Odostomia plicata, Montagu. 



Turbo phcatus, Mout. Test. Brit, (ii.) p. 325, t. 21, f. 2. 



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



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

 fossilized). 



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

 (Mc Andrew) : 0-120 fms. 



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

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

 fossil. 



Eulima bulimus of Scacchi, Rissoa clongata of Philippi, O.fusulus 

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



Proc. Zool. Soc— 1884, No. XXIV. l>4 



