546 PLIOCENE MOLLUSCA. 



1871. Scalaria hamulifera, Nyst, Auu. Soc. malac. Belg., vol. vi, p. 112, no. 140. 



1872. Scalaria hamulifera, A. and E. Bell, Proc. Greol. Assoc, vol. ii, p. 204.. 

 1890. Scalaria hamulifera, C. Reid, Plioc. Dep. Brit., p. 256. 



1912. Boreoscala haiiiulifera, Cossmanu, Ess. Pak'ocoucli. couipar., vol. ix, p. 56. 

 1918. Scalaria {Cirsutrema) hamulifera, de Bourj, MS. 



Specific Characters. — Shell minute, turriculate, imperforate; wliorls 8 or 9, 

 convex ; ornamented by numerous, very fine, closely-set, longitudinal and lanielli- 

 form costre, occasionally varicose, acutely pointed or liook-sliaped at the suture, 

 with delicate spiral ridges ; spire regularly tapering ; suture distinct ; basal ridge 

 nearly obsolete ; mouth subcircular. 



Dimeiislons. — L. 17 mm. B. 6 mm. 



Distribution. — Not known livinof. 



Fossil: Coralline Crag: Sutton. Gourbesville, 'Normandy {fide 

 de Boury). 



Reuiarl's. — Only one example of this small and delicate species was known to 

 Wood. M. Cossmann groups it with Bureuscala, but in a private letter received 

 from M. de Boury the latter informed me that, having examined the type-specimen 

 in the British Museum, he adopted Wood's view and associated it with the fimhi-iosa 

 {Girsotreina) group. Jeffreys regarded it as a variety of that species — a view, 

 however, I am unable to accept. M. Cossmann reports it from the Crag of 

 Gourbesville in Normandy, on the authority of M. de Boury. 



The imperfect specimen now figured belongs to the Reed Collection at the York 

 Museum. It is probably the one identified some years ago by Mr. A. Bell. Although 

 not very satisfactory I do not know any other Crag Scala to which it can be more 

 probably referred. The fine transverse lines characteristic of this species, which 

 do not appear on my figure, are distinctly though somewhat obscurely shown in the 

 specimen itself. The figure hardly does justice to the latter. It ought to have 

 been enlarged, but unfortunately it was broken in the process of figuring. The 

 identification must therefore remain a doubtful one. It is to be hoped that 

 another specimen may turn up hereafter. 



Scala (Cirsotrema) signata, de Boury, MS. Plate XL VIII, figs. 15, 10. 



1879. Scalaria cjeniculata (Brocchi), S. V. Wood, Mou. Crag Moll., 2ud Suppl., p. 26, pi. iv, fig. 11. 

 1890. Scalaria geniculata /, C. Reid, Plioc. Dej). Brit., p. 256. 



Specific Characters. — Shell small, rather fragile ; whorls distinctly convex ; 

 ornamented by numerous fine but prominent longitudinal costas, placed obliquely, 

 and by short well-marked spiral ridges in the interspaces, with a small basal disc; 

 spire short, regularly tapering ; suture deep. 



Dimensions. — (Of Crag specimen) L. 6 mm. B. 3 mm. 



Distribution. — Not known living. 



