NEWTON AND HARRIS : ISRITISn EOCENE SCAPUOPODA. 65 



FusTiARiA LTJciDA, Desliayes. 



JDentalium lucidum, Desli. — Desc. Anim. sans Vert. 1861, vol. ii. 

 p. 214, pi. i. figs. 18-20. 



Dentalium [Fmtiaria) lucidum^ Cossm. — Ann. Soc. 11. Mai. Belgique, 

 1888, vol. xxiii. p. 10. 



Fustiaria lucida, R. B. Newton. — Syst. List Edwards Coll. British 

 Museum, 1891, p. 285. 



This species differs from F. Jissura in having a much longer posterior 

 fissui'e, in being less arch-shaped, and narrower generally. We 

 agree with M. Cossmann that the specimen figured by J, de C. 

 Sowerby as Bcntalmm nitens in Dixon's " Sussex." pi. vii. fig. 3, 

 ought properly to be referred to F. fissura : this conclusion we have 

 arrived at after comparing a number of British specimens with some 

 fi'om the Paris basin. We may remark that F. lucida is confined to 

 the Lower Eocene of the Paris basin. Very rare ; one specimen only 

 in the Museum. 



Formation. — Bracklesham Beds. Locality. — Bracklesham Bay. 



Fustiaria pelltjcens, Desliayes. 



Bentalium pellucens, Desh. — Desc. Anim. sans Vert. 1861, vol. ii. 

 p. 214, pi. i. figs. 21-23. 



Dentalium {Fustiaria) pellucens, Cossm. — Ann. Soc. R. Mai. 

 Belgique, 1888, vol. xxiii. p. 10. 



Fustiaria pellucens, E. B. Newton. — Syst. List Edwards Coll. 

 British Museum, 1891, p. 286. 



This is a slender form, having a greater curvature than either 



F. Jissura or F. lucida. It is much inflated anteriorly, and very 

 rapidly decreases in diameter towards the posterior region. The 

 specimen from Stubbington is so fragmentary that some doubt exists 

 as to its proper determination. Common ; but perfect specimens are 

 rather rare. 



Formations and Localities. — Barton Beds: Barton and Highcliff. 

 Bracklesham Beds : Bracklesham Bay and Stubbington. 



Fustiaria subeburnea, Orbigny. 



Dentalium ehurneum, G. B, Shy. — Genera Bee. Foss. Shells, 1825, 

 No. 15, fig. 6 i^non Linnaeus, nee Lamarck, 1818). Desh. — Mem. Soc. 

 Hist. Nat. Paris, 1826, vol. ii. pt. 2, p. 368, pi. xvii. figs. 8-11. 



G. B. Shy.— ZooL Journ. 1829, voL iv. p. 198. 



Dentalium suheburneum, Orb. — Prod. Pal. Strat. 1850, vol. ii. 

 p. 372. 



Dentalixim ehurneum, Desh. — Desc. Anim. sans Vert. 1861, vol. ii. 

 pp. 215, 216, pi. ii. figs. 8-13. 



Dentalium {Fustiaria) ehurneum, Cossm. — Ann. Soc. R. Mai. Belgique, 

 1888, vol xxiii. p. 10. 



Fustiaria circinata, R. B. Newton. — Syst. List Edwards Coll. 

 British Museum, 1891, p. 284. 



This species differs from F. circinata of the Paris basin in being 

 shorter, its diameter is proportionately larger, and the annulations are 



