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



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



Eulima unifasciata, Forb. Rep. Mg. 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 and Azores ('Talisman' Exp.), New 

 Enj<land(Fem7/); 30-1622 fms. 



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

 E. testa turrita, iBevigata, ])olita, alba, fascia fulva cincta : an- 

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

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

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

 notice ; tliis 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. 



Syi-nola 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. 

 c/ 20. Odostomia tricincta, Jeffreys. 



O. tricincta, Jeffr. in Ann. & Mag. N. H. Febr. 1856, p. 185, 

 pi. ii. f. J 2, 13. 



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



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

 Adriatic, Canaries {McAndrew), &nA Madeira {Watson); 25-120 

 fms. 



Fossil. Pliocene: Monte Pellegrino, Sicily (3/o?t^e?'osff<o). 



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

 of Philippi ; but his description and 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 only two bands. 

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

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

 scribed or even named. 



24* 



