THE 



GEOLOGICAL MAGAZINE, 



NEW SERIES. DECADE II. VOL. IX. 



No. v.— MAY, 1882. 



I. — Contributions to the Paleontology of the Yorkshire 



Oolites. 



By Wilfrid H. Hudleston, M.A., F.G.S. 



President Geologists' Association. 



[Continued from page 151.) 



(PLATE V.) 



Genns Fusus, Lamarck, 1799. 



THE number of fossil species of Fusus is considerable, but they 

 do not date back from a very high antiquity. None are 

 enumerated by Tate and Blake from the Lias of Yorkshire. Certain 

 forms from the Upper Lias of Normandy, referred by Deslong- 

 champs to Fusus, have not been accepted as such, and the first of 

 the genus admitted by D'Oi'bigny is Fusus noclulosus, Desl., from the 

 Great Oolite of Langrune. Even this almost comes within the genus 

 Brachytrema of Lycett (Ool. Moll. p. 24), instituted to include some 

 small turbinated forms with highly ornamented whorls and a short 

 oblique canal. 



Fusus multicostatus, M. and L., from the Great Oolite of Minchin- 

 hampton, has a better claim to be admitted into the genus. This 

 species is recognized by Brauns as occurring in what may be 

 regarded as the equivalents of the Great Oolite in N.W. Germany. 

 But the most thorough Fusus, perhaps, of the Jurassic rocks is 

 F. Piette, Heb. and Desl., from the Callovian of Montreuil-Bellay.^ 



Seeing that there is little encouragement to expect a Fusus in the 

 Superior Oolite of Yorkshire, it is not altogether without hesitation 

 that I have introduced 



1.— Fusus, sp. PL V. Figs, la, lb. 



Description. — Specimen from the Dogger (Zone 1) Peak (Blue 

 Wyke). My Collection. 



Length 27 millimetres. 



Width 15 



Spiral angle 65°. 



The shell tapers towards either extremity. Body-whorl, including 

 the canal, about 3-5 times the length of the rest of the spire. No 

 umbilicus. Aperture oval-elongate and curving anteriorly. The 

 1 BuU. Soc. Linn. Norm. v. p. 172, pi. viii. fig. 6. 



DECADE II. — VOL. IX. NO. V. 13 



