1884.] ' LIGHTNING' AND ' PORCUPINE ' EXPEDITIONS. 351 



18. Odostomia unifasciata, Forbes. (Plate XXVI. fig. 8.) 

 Eulima unifasciata, Forb. Rep. JEg. Inv. (Rep. Brit. Assoc. 1843), 



p. 188. 



'Porcupine' 1870: Med. St. Adventure Bank. 



Distribution. Bay of Biscay ('Travailleur' Exp.), throughout the 

 Mediterranean, off the Sahara aud Azores ('Talisman' Exp.), New 

 England (Ferrill); 30-1622 fins. 



Forbes's description is as follows : — "Eulima unifasciata, sp. nov. 

 E. testa turrita, laevigata, polita, alba, fascia fulva cincta : an- 

 fractibus 1 1 planiusculis ; apertura ovata. Long O^ unc. Lycia. 

 Reg. viii." This description was evidently intended for the shell 

 which is now figured, although the tooth must have escaped his 

 notice ; this was also the case with several species of Odostomia, 

 described by Philippi as Rissoa. 



The mouth is angular or sharply pointed above and below. A 

 specimen from the Gulf of Naples, which has a conspicuous band 

 and tooth, shows also a grooved or crenated mouth. 



It is the Eulimella smithii of Verrill. 



19. Odostomia minuta, H. Adams. 



Syrnola minuta, H. Ad. in P. Z. S. 1869, p. 274, pi. xix. f. 10. 



'Porcupine' Exp. 1870: Atl. St. 14, 30; Med. Adventure 

 Bank. 



Distribution. Bay of Biscay ('Travailleur' Exp. 1882), Medi- 

 terranean {Susini, Monterosato, Spratt, 'Shearwater' Exp. and 

 'Washington' Exp.), Orotava (McAndrcw); 54-249 fms. 



Fossil. Pliocene : Altavilla {Brugnone). 



O. macella, Brugnone. 



The operculum is of a pale yellowish colour. The coloured band 

 is not always present. I do not know what character justified the 

 separation of this species as a distinct genus, nor what is meant by 

 the name Syrnola. 



B. Striated lengthwise or reticulated, and dentated. 



20. Odostomia tricincta, Jeffreys. 



O. tricincta, Jeffr. in Ann. & Mag. N. H. Febr. 1S56, p. 185, 

 pi. ii. f. 12, 13. 



' Porcupine ' Exp. 1870 : Med. St. off Rinaldo's Chair. 



Distribution. N.W. France {Cailiiaud), Mediterranean and 

 Adriatic, Canaries (Mc Andrew), and Madeira {Watson) ; 25-120 

 fms. 



Fossil. Pliocene : Monte Pellegrino, Sicily {Monterosato) . 



Variable in size. It may possibly have been the Rissoa doliolum 

 of Philippi ; but his description aud figure show no coloured band 

 nor the tooth-like fold on the pillar, and the ribs are fewer in that 

 species. Some specimens of the present species have onlv two bands. 

 O. tricincta was apparently figured in Savigny's unfinished work, 

 ' Histoire Naturelle de l'Egypte,' 1805-12, but it was never de- 

 scribed or even named. 



24* 



