372 Mr. E. A. Smith on the Genera 



^fesalia {nterm'^dia (Desl)ayes), 



1832. TurriteJla intermedia, Deshayes, Coq. foss. Environs Paris, vol. ii. 



p. 283, pi. xxxvii. fig-s. 17, 18, pi. xxxviii. iigs. 3, 4. 

 1888. Turritella rohusta, Sowerby, Proc. Zool. Soc. p. 21], pi. xi. 



fi-. 18. 



I have includerl this Paris Basin fossil in this list to call 

 attention to tlie fact that the shell desciibed as recent by- 

 Mr. Sowerby is merely a well-preserved and nicely cleaned 

 spechnen of Deshayes's species. 



I perceived at a glance it was quite distinct from Tiirn~ 

 tella, and it occurred to nie it mi<ilit be an extinct forni, 

 since it was so unlike any known liviii<^ species. I therefore 

 submitted it to Mr. R. Knllen Newton, who at once identified 

 it with this species. He kindly placed a series of specimens 

 at my disposal for comparison and, consequently, I am in a 

 position to confirm his determination. Mr. Sowerby^s type, 

 now in the British Museum, was, as might be expected, 

 described without a locality. 



The figure of it is very crude and inaccurate, tlie whorls 

 being represented too narrow and too convex, and contracted 

 at the lower part. The labrum being broken back some- 

 what gives the mouth a rounder look than in perfect speci- 

 mens, and the anterior or ba^sal sinus is less apparent. 



TURRITELLOPSIS, Sars. 



1878. Turritellopsi.", Sars, Moll. Reg. Arct. Norveg. p. 186 (shell and 



radula figured). 

 1885. Turriiellopsis, Fischer, Man. Conch, p. 694, as subgenus of 



Turritella. 

 1883. Turritellopsis, Tryon, Struct. Syst. Conch, vol. ii. p. 224, pi. Ixvii. 



fig. 56 (shell). 

 1897. Turritellopsis, Kobelt, Conch. Cab., Turritella, p. 67, pi. xx. 



fio-s, 10, 1 1 (shell ), regarded as a distinct genus. 



This genus in form and sculpture is very like Turritella, 

 but differs in regard to the character of the radula. The 

 opeiculum is circular, multispiral, with central nucleus. 



Turritellopsis acicuJa (Stlmpson). 



1851. Tiirritella acicula, Stimpson, Proc. Boston Soc. Nat. Hist. 



vol. iv. p. 15. 

 1851. Turritella acicula, id. Shells of New England, p. 35, pi. i, 



fig. 5. 



1870. Turritella acicula: Gould, Invert. Massachusetts, ed. 2, p. 319, 

 fig. 588. 



1871. Mesalia acicula : Dall, Amer Journ. Conch, vol. vii. p. 118. 

 1878. Turritellopsis acicula : Sars, Moll. Reg. Arct. Norveg. p. I8G, 



pi. X. tigs. 14, n b ; radula, pi. vii. figs. 2, a e. 



