NASSA (UZITA) R PIT I COS A. 519 



have l)efore pointed out tlie im})ortaiice of the Hoytoii fauna as forming' a link 

 between t 

 and Oakley. 



between the Coralline ('rag of Sutton and (jjedgrave and the lied Cvag of Walton 



Var. costata, S. V. Wood. Plate XLVI, fig. 7. 



1848. Nassa reticosa, var. costata, S. V. Wood, Mou. Crag Moll., pt. i, p. 3o, pi. iii, tig. lO//. 

 1914. Nassa reticosa, var. costata, F. W. Hanuer, Plioc. Moll. Gt. Britain, vol. i, p. 63, pi. iii, 

 fig. 16. 



Remarks. — The specimen figured hy Wood under this name is a small shell 

 with strong longitudinal costa3. It is not unconnnon, cither in the Coralline Crag 

 of Boyton or in the Waltonian of Walton and Little Oakley. My own fossil, 

 fig. 7, comes from Walton. It is not unlike the var. rugosa, but is smaller and more 

 delicately striated. 



Var. tiara, S. V. Wood. Plate XLVI, fig. 10. 



1842-48. Nassa reticosa, var. tiara, S. V. Wood, Ami. Mag. Nat. Hist. [1], vol. ix, p. 539, 1842 ; 

 Mou. Crag Moll, pt. i, p. 33, pi. iii, fig. 10 d, 1848. 



Bemarl-s. — This distinct variety is rare in the Crag and is not often obtained 

 perfect. 



Var. fenestralis, S. V. Wood. Plate XLVI, fig. 5. 



1848. Nassa reticosa, var. fenestralis, S. V. Wood, Mon. Crag Moll., pt. i, p. 33, pi. iii, fig. 10 e. 



Remarks. — This variety occurs both in the Coralline Crag of Boyton and in the 

 Red Crag of Oakley and elsewhere. It is specially characterised by its turreted 

 spire and its granulated sculpture. 



Var. concinna, S. V. AVood. Plate XLVI, fig. 9. 



1848. Nassa reticosa, var. concinna, S. V. Wood, Mou. Crag Moll., pt. i, p. 33, pi. iii, fig. 10 ij. 



Remarks. — This variety is small and slender with delicate sculpture, longitudinal 

 and transverse, the latter extending to the base. It occurs also in the Belgian 

 Crag, as do most of the varieties found in that of East Anglia. 



Var. deformis, S. V. Wood. 



1848. Nassa reticosa, var. deformis, S. V. Wood, Mou. Crag Moll., pt. i, p. 33, pi. iii, fig. 10/. 



Remarks. — This form may possibly be an abortive growth. I have never met 

 with it myself. 



